PREVALENCE HIV INFECTION AMONG TUBERCULOSIS AND NON TUBERCULOSIS PATIENTS - CASE CONTROL STUDY
Posted by on Monday, 12th January 2015
PREVALENCE OF HIV INFECTION AND IT’S AMONG TUBERCULOSIS PATIENTS AND NON-TUBERCULOSIS PATIENTS – CASE CONTROL STUDY
DR.S.ABBAS ALI
MD, DFM, DNB, MNAMS
FCGP, MCCP (CARDIOLOGY)
PGDHSc (Ultrasonography)
PGDHSc (Echocardiogram)
M : 9412178773
Email: dr_s_abbas20@yahoo.co.in
Abstract
Objectives: To determine the prevalence of HIV infection and its clinical profile among tuberculosis patients (Cases) and Non-TB patients (Controls)
Methods: A case-control study study was conducted at District Hospital, Mathura, Uttar Pradesh during the period September 2009 to February 2011. 252 proven Tuberculosis patients as cases and 252 non-tuberculosis patients (having similar clinical features like TB) as controls selected stratified random sampling method
Results: Out of 252 tuberculosis patients 26 were HIV seropositive and none was positive in Non-TB patients. The percentage of prevalence in TB patients was 10.3%. The prevalence in males 13.2% (19/143) and in females, 6.4% (7/252), 12 (46.15%) were married and 14 (53.85%) were singles, 17 (65.38%) patients were Hindus and 9 (34.62%) were Muslims. 14 (53.85%) patients were from rural areas and 12 (46.15%) patients were from urban areas. 96.2% HIV –TB patients has income below 10000/Rs and all most all HIV – TB patients has heterosexual sexual behavior and not used protective measures during unprotected extramarital sex. The most peculiar clinical features of HIV seropositive TB patients of this study were chronic diarrhea (73%) aphthous ulceration (92.3%), pain in abdomen (38.4%) oral candidiasis (26%) lymphadenopathy (39.8%).
Conclusions: HIV seroprevalence was higher among TB patients and calls for routine HIV screening and counseling of TB suspects for holistic management.
INTRODUCTION
Tuberculosis is a major opportunistic infection of HIV patients’ world wide and despite the synergy between the human immunodeficiency virus (HIV) and tuberculosis (TB) epidemics; the public health responses have largely been separate. Detection of HIV among TB patients is crucial to the holistic management of HIV-TB co-infected patients. The joint statement by the American Thoracic Society, Centers for Disease Control and Prevention, and Infectious Diseases Society of America recommends that all patients with tuberculosis (TB) undergo testing for human immunodeficiency virus (HIV) infection after Counseling (Blumberg et al 2003).
As per NATIONAL AIDS CONTROL ORGANIZATION, HIV/AIDS epidemiological surveillance and estimation report for the year 2005. (Available from: http:// www.nacoonline.org/fnlapil06rprt.pdf [Last accessed on 2010 Sep 20]) an estimated 5% TB patients were HIV infected. Routine HIV testing in tubercular patients is NOT the national policy. Many patients were being treated for tuberculosis under programme conditions without knowledge of the presence or absence of concurrent HIV infection. Relapse rate is high in HIV-TB, which may be due to re-infections rather than true relapse of TB. This thesis finding stresses the importance of HIV screening of high risk TB patients such as drivers, labors, businessmen at least, to avoid confusion during management and treatment of Tuberculosis patients.
OBJECTIVES:
To determine the prevalence of HIV infection and its clinical profile among tuberculosis patients (Cases) and Non-TB patients (Controls). The parameters evolved were socio-demographic factors, habits, sexual behavior, clinical and radiological features.
Methods
Setting: DISTRICT HOSPITAL, MATHURA, UTTAR PRADESH
Duration: September 2009 to February 2011
Study design: Retrospective case control study
ESTIMATION OF SAMPLE SIZE: Sample size estimated on 50% power, 95% of confidence level 10% exposure in TB patients (Cases) and 5% exposure in non-ill group (controls) by statistician calculator (Epi Info version 6 November 1993). This had given a sample size of 252 patients for each group such as cases and controls. Services of Eminent Statistician utilized in estimation of sample size.
Method of sampling: Stratified systematic Random sampling system
Identification of cases and controls: From OPD register, 252 Tuberculosis patients (all three categories) were drawn. Stratified random sampling technique was used in the selection of cases. Only proven TB patients whose HIV status was not known at the time of TB diagnosis were included in the analysis to draw the true prevalence of HIV infection among TB patients. TB diagnosis was done on the basis of smear microscopy, chest radiography, and clinical signs/symptoms as per the Revised National Tuberculosis Control Programme (RNTCP).
The controls are free from disease under study but have similar symptomatology. From OPD register controls were drawn from diagnosed cases of acute bronchitis, allergic bronchitis, and acute exacerbation of chronic bronchitis, bronchiectasis, chronic bronchitis, emphysema and malignant pleural effusion. I selected one control for each case (252) from the eligible source population, matched on age, gender and calendar year. Stratified Random sampling technique was used in the selection of controls.
DATA COLLECTION:
The study was clinic based and data collected by me. The study protocol includes the information regarding life style and socio-demographic factors ( patient age, gender, religion, occupation, marital status, income, place of residence, education, habits), detailed history of the disease and physical examination of each patient (both cases and controls) included in the study was done and following information such as clinical features, radiological features, category TB, Sputum AFB status, type of TB, Risk factors responsible for the spread of HIV, HIV Virus subtype responsible for HIV infection and CD4 cell count of HIV patients were recorded. A chest X-ray was taken from all patients to study the radiological pattern. Information collected about them was treated as confidential and the study did not interfere with the normal management of the patients
Data were collected between September 2009 and February 2011, and a total of 504 (252 cases and 252 controls) participants were recruited as study subjects. Informed consent in their own language was obtained from the patients prior to enrolment. For those below 20 years, permission was sought from their parents/guardians.
HIV DETECTION:
During a regular follow-up visit and after pretest counseling, blood samples were collected for HIV antibodies screening and were tested initially by the three Rapid card tests as per the guidelines laid down by NACO (Testing strategy III) and positive test result was disclosed to the patients by post test. The results were again confirmed by ELISA test for HIV antibodies was done on all patients (cases and controls) included in the study. A patient was said to be positive for HIV when tested for positive by two different HIV test kits done on different occasions. Western Blot was not done due to lack of availability. All the ethical issues were observed during data collection. The HIV positive TB patients referred to nearest ART centre (convenient to patients) either Delhi or Agra and they are carefully and patiently followed and their CD4 cell count collected and studied during the follow up of ATT treatment at DOTS centre and the response with ART observed.
STATISTICAL ANALYSIS:
The data of cases and controls were analyzed using EPI info software version 6 (1993) and SPSS soft ware version 17. The socio-demographic variable differences in prevalence of HIV infection between cases and controls was statistically assessed using Chi-square test. Qualitative data was compared and analyzed in terms of percentages. Results of the two groups were compared using appropriate statistical technique. The statistical significance of the values was expressed through p – values, where ever the p – values are not significant, the odds ratio was expressed. A two-tailed p-value of <0.05 was considered as statistically significant results.
Results:
252 confirmed and microbiologically proven TB patients (cases) and 252 non TB patients having similar clinical features like cases, aged between 18 – 57 years were screened for HIV-1/2 antibodies by ELISA method. Of these, 26 cases were found to be HIV-positive in TB patients and none was found in controls. Seroprevalence of HIV infection among TB patients was 10.3% (26/252). HIV seropositivity observed 10.9% (6) were in the age group of 18-27 ( 4 females and 2 males), 14.7% patients (11 males and 3 females) were in the 28-37 age group, 10% (6 males) were in the age group of 38 – 47 and none was found in the age group of 48 – 57. The mean age of prevalence of HIV infection was 34.5 years. Out of 252 controls no HIV seropositive were found in any age group.
The HIV infection was found to be more in males i.e. 13.2% (19/143) than in females, 6.4% (7/252), 12 (46.15%) were married and 14 (53.85%) were singles, 17 (65.38%) patients were Hindus and 9 (34.62%) were Muslims. 14 (53.85%) patients were from rural areas and 12 (46.15%) patients were from urban areas. 25 (96.2%) HIV-TB patients income was below Rs.10000/month and majority were transport drivers 8 (30.8%) labors 5 (19.3%), businessmen, farmers and house wives of these occupations and they have low literacy levels.
All the 26 (100%) HIV-TB patients had given heterosexual sexual behavior, and all are not using condoms and practicing unsafe sex. 77% (20) patients had given extra-marital unsafe sex with sex worker and multiple partners. None gave homosexual history, blood transfusion, and IV drug abuse or using unsterilized needles. 19.2 %( 5) patients had given history of migration. Six (23.9%) female patients had acquired the infection probably by heterosexual contact with infected spouse. past history of unprotected extra-marital sex was revealed in 77% (20) of HIV seropositive tuberculosis patients and it will be major risk factor for transmission of HIV infection and Alcoholism 73% (19/26), migration to cities or metros for work, low literacy, and poverty were the other factors fuelling the spread of HIV infection according to this study.
The most peculiar clinical features of HIV seropositive TB patients of this study were chronic diarrhea (73%) aphthous ulceration (92.3%), pain in abdomen (38.4%) oral candidiasis (26%) lymphadenopathy (39.8%). The fever, loss of weight, loss of appetite, cough were common to both TB and HIV-TB. The difference in signs and symptoms among the HIV positive and HIV negative TB patients was found to be statistically significant. 17 (65.4%) HIV seropositive TB patients had sputum AFB negative and 9 (34.6%) had sputum AFB positive.
. In this study extensive cavitatory lesions were common in Tuberculosis patients but in Co-infected (HIV-TB) patients’ ill-defined fibrotic lesions on upper lobe were more common and HIV-1 was the predominant viral subtype. Out of 26 HIV seropositive TB patients, 16 (61.5%) had Pulmonary tuberculosis patients, 6 (20.1%) had extra-pulmonary tuberculosis and 4 (15.4%) had combined variety. The main site of extra-pulmonary involvement was mesenteric lymphadenopathy and abdomen (8 patients) followed by pleural (1) and cervical lymphadenopathy (1) and brain (1). In this study we found 69.2% of cases (18 patients) were found in Category I, 27% of cases (7 patients) found in Category 2, and 3.8% of cases (1 patient) found in category 3. Maximum number of cases observed in category 1
In this study of CD4 cell count, 7 (26.9%) patients were found in the category range of 51 – 100 which includes 5 (21.3%) males and 2(28.6%) females. In this range we found 3 (18.8%) pulmonary, 2 (33.3%) extra pulmonary and 2(50%) combined tuberculosis patients. In the range 101 – 200, we found 12 (46.2%) (10 (52.6%) males and 2 (28.6%) females) cases, in which 9 (56.2%) were pulmonary, 2 (50%) combined and 1 (16.7%) extra-pulmonary. In the range 201 – 300 we found 7 (26.9%) (4 (21.1%) males and 3 (42.8%) females) cases, of which 4 pulmonary and 3 extra-pulmonary. The mean CD4 cell count was 182.
Discussion:
The present study demonstrated prevalence of HIV infection among tuberculosis patients was 10.3%. No HIV infection found in controls. Mohanty et al. (Ind.j.tub 1994) reported 5.89% of HIV infection in tuberculosis patients from Mumbai. Vasudevaiah et al. (Indian j.tub 1997) reported HIV seropositivity in tuberculosis patients attending the Govt.Hospital for chest diseases, Gorimedu, Pondicherry was 4% in 1994, 3.5% in 1995 and 4.9in 1996. The HIV/AIDS epidemiological and surveillance project 2005 conducted by National AIDS control organization, Ministry of health and family welfare, Govt. of India, estimated 9% of HIV infection among tuberculosis patients. The findings of above studies are very much agreement of this project and indicating that the risk of HIV infection among tuberculosis patients was increasing. The HIV seroprevalence of 10.3% among TB patients in our study is a cause for alarm, especially in view of the fact that HIV seroprevalence among TB patients is a good indicator of the spread of HIV infection in the general population.
The prevalence of HIV seropositivity in tuberculosis patients in the present study was 10.3%, which is higher than the HIV prevalence found in other studies in India. In the twin studies from Pondicherry, Siva Raman et al (1992) and Arora et al (1993) reported HIV seroprevalence of 2.7% and 3.4% respectively in tubercular patients. Mohanty et al (1994) reported a seroprevalence of 5.89% from Mumbai. The high prevalence of HIV infection in tubercular patients in these two places, Mumbai and Pondicherry is because of prevalence of HIV infection there. Mumbai is a metropolitan city and prostitution is rampant there. Immigrant populations who come here in search of work were easy target to the prostitutes, from whom they contact the HIV infection. Infact, the prostitutes in Mumbai have been reported to have a very high sero prevalence of HIV infection up to 51% (Lal et al 1994). Though, Mathura is less industrialized and the higher seropositivity (10.3%) in tuberculosis is causing concern. In this study, the most of the HIV-TB patients were drivers, labors, and cattle businessmen. These people do not have proper sex and health education, and most of the time they were away from their families and homes, befalls easy prey to the prostitution, which may be the cause of significantly higher HIV seropositivity. As compared to previous reports from Delhi of 4.4% in 1995-1999, 9.4% in 2000-2002, and 8.3% in 2003-2005. Ramachandran et al (Indian J Med Res 2003) have reported a seroprevalence of 4.7% in Tamil Nadu in 1997-1998. The trend observed over the years highlights the importance of continuous surveillance and in-time appropriate preventive measures.
In this study, 252 controls of unknown HIV status having similar symptomatology to cases had screened for HIV antibodies. No HIV infection was identified in controls. The percentage of diseases collected as controls were allergic bronchitis 22.3%, acute exerbations of chronic bronchitis 10.3%, COPD 26.2%, emphysema 12.6%, acute bronchitis 17.9%, malignant lung disease 5.5%, malignant pleural effusion 5.2% and bronchiectasis 4.8%. Few authors like J cadranel, D Garfield et al (2010) reported lung cancers were reported in higher frequency in HIV patients. These study findings were contrary to the findings of above author. It may be possible; we screened lung cancer patients of unknown HIV status and not in confirmed HIV patients.
SOCIODEMOGRAPHIC CHARACTERISTICS
AGE AND SEX
The study population comprised of 252 confirmed TB patients as cases, who were screened for presence of HIV antibodies. Of these, 143 (56.7%) were males and 109 (43.7%) were females. The HIV prevalence in relation to gender in TB patients was 13.2% (19) in males and 6.4% (7) in females. The overall male: female ratio was 2.7:1. The overall prevalence of HIV infection in TB patients was 10.3%. No HIV infection was found in controls. In control group the distribution of males 59.2% (149) and females 40.8% (103). The mean age of prevalence of HIV infection was 34.5 years and the main age group affected was 18 – 47 which is the sexually active age and is also the most productive in one's life. In Mumbai, Mohanty et al. (Ind.j.tub 1993) reported highest seroprevalence (71.7%) in the 21 – 40 year age group. Talib et al (Journal of infectious diseases, 1993) also reported maximum HIV cases in the age group of 20 – 39 years. So the findings of this project were very much agreement of the above studies. The HIV prevalence in relation to gender in TB patients was 13.2% (19) in males and 6.4% (7) in females. The overall male: female ratio was 2.7:1. NACO epidemiological report – 2005, reported 39% were females and 61% were males. The striking male predominance noted in the present study has also been reported by other authors. Such as Deivanayagam CN et al, (Ind.J.Tuberculosis:2001) Bhagyabati DS et al (Journal, Indian Academy of Clinical Medicine 2005), and Swaminathan S et al (2002). So the findings of this study were very much in agreement of the above studies.
MARITAL STATUS
Out of the 26 tubercular patients with HIV seropositive TB patients 14 (53.85%) were singles and 12 (46.15%) were married which includes unmarried singles and married singles due to divorce and separation. Prevalence was significantly high among singles. This finding is also consistent with previous reports, which found single, unmarried persons more vulnerable to HIV infection. Single unmarried persons are more likely to maintain multiple sex partners or be involved in high risk sexual behaviors (homosexuality, commercial sex work, alcohol use and intravenous drug abuse) that make them vulnerable to infection with HIV.
RELIGION
Out of 26 HIV seropositive tubercular patients, 17 (65.38%) patients were Hindus and 9 (34.62%) were Muslims. In 226 HIV seronegative tubercular patients 125 (55.31%) were Hindus, 76 (33.63%) were Muslims and 25 (11.06%) were others which includes Christians and Punjabis. No HIV seropositives were identified in controls. Dermal et al. (Indian J Community Med 2002) reported HIV positivity was seen equally among all religions and both sexes.
PLACE OF RESIDENCE
Out of 26 HIV seropositive tubercular patients, 14 (53.85%) patients were from rural areas and 12 (46.15%) patients were from urban areas. It signifies that prevalence was higher in rural areas. It may be due to change in life styles, behavior, migration and effective ways of communication like transport, travel including tourism. The epidemiological report of NACO – 2005, reported HIV infection in rural areas was 58.7% and in urban areas was 41.3%. These findings were very much in agreement with the findings of this study.
INCOME
Out of 26 HIV seropositive tubercular patients, 14 (53.85%) patients were found their income below 3000/-Rs and nil, 8 (30.76%) patients were found their income below 5000/-Rs/month, 3 (11.54%) were found their income below 10000Rs/month and 1 (3.85%) was identified income below Rs20000/month. The majority of HIV patients were found low income groups. Theur et al. (J.infectious diseases 1990) from California and Prasad et al (2003) from India reported HIV infection was more common in poor socio-economic status.
LITERACY
Out of 26 HIV seropositive TB patients 7 (26.92) were illiterates, 9 (34.62%) were studied up primary level, 5 (19.23%) were studied up to upper primary level, 4 (15.38%) were completed secondary education and 1 (3.85%) was found graduate. In this study we observed majority of HIV-TB patients were having low levels of literacy.
OCCUPATION
Out of 26 HIV seropositive TB patients 7.7% (2) were businessmen, farmers 7.7% (2) drivers were 30.8% (8), labors 19.3 (5) housewives 26.8% (7) professionals 7.7 (2). The occupational profile of our patients revealed that a majority of them were transport drivers, laborers, businessmen and house wives of these occupations. Mohanty et al. (Ind.j.tub 1993) reported 36.8% patients working as manual laborers while Rajsekaran et al. found majority (55.6) of patients working as farm labors. Jenkins et al. (Clin Infect Dis 2000) reported high prevalence of HIV infection in occupations involving mobility. Other authors have found seropositivity rate was highest among those who were unemployed (40%) followed by the business professionals (35%). The percentage of the professions is thus seen to vary in different studies, largely due to the differences in the occupational patterns and the source from where the patients were selected.
LIFE STYLES AND RISK FACTORS
HABITS
Out of 26 HIV-TB patients, 69.3% (18) of patients were alcoholics 73% (19) were smokers, 100% (26) patients had given history of tobacco chewing and substance abuse was not seen in seropostive TB patients. In comparison of cases and controls the percentage of prevalence of bad habits was more in HIV seropositives. In this study alcoholism was found to be contributing factor for visiting commercial sex workers and thus seems to the risk factor. Similar observations reported by Katarina et al. (Med J Armed Forces India 2000)
RISK FACTORS
Heterosexual route and extra-marital sex and unsafe sex with single/multiple partners and commercial sex workers were most important risk factors of this thesis study. Arora et al (Indian chest diseases, Allied science 1993) reported a history of heterosexual promiscuity in 75% of the HIV seropositive cases. Mohanty et al (Ind.j.tub 1993) reported 95%, and Talib et al (1999) reported 100% of heterosexual promiscuity. All these were in concordance with the findings of this project. The heterosexual transmission (100%) remains the commonest mode of transmission in this study since other sexual practices being very uncommon in my area. Six females seemed to have acquired infection from their infected husbands. More than 77% had extra-marital relations. There was however no case of transmission that could be attributed to blood transfusion or IV drug abuse, contrary to several studies reported from other parts of India and abroad.
CLINICAL FEATURES
In this study, General weakness or asthenia was common in both TB and HIV-TB patients (100%) but General weakness is observed in higher degree in HIV-TB patients. Asthenia observed 41.7% in controls. Fever was observed (100%) both in TB and HIV-TB patients but in controls it was observed in 11.9%. Cough, dyspnoea and chest pain observed in more or less same proportion in controls, TB and HIV-TB patients. Haemoptysis was present in 34% of TB patients which was massive in some patients, 19.2% in HIV-TB patients and 8% in controls. Loss of appetite was observed in equal proportions (100%) both in TB and HIV-TB patients but it was observed in 49% of controls. Loss of weight more than 10% was observed in equal proportions (100%) in TB and HIV-TB patients. Ascitis and herpes zoster was observed in equal proportions in TB and HIV-TB patients. The most peculiar clinical features of HIV-TB in this study were recurrent fever (100%), chronic diarrhea (73%) aphthous ulceration (92.3%), pain in abdomen (38.4%) oral candidiasis (26%) lymphadenopathy (39.8%). The fever, loss of weight, loss of appetite, cough were common to both TB and HIV-TB. The mean duration of the most common presenting symptom (cough) was 12 weeks while fever and weight loss had mean duration of about 14 and 12 weeks, respectively, at the time of presentation. Mean duration of anorexia was 15 weeks and for dyspnoea it was about 8 weeks. The average (mean) duration of symptoms at the time of presentation was 12.2 weeks, which is in overall suggestive of late presentation and contributing to the delay in the diagnosis of TB. The duration of illness in the present study ranged from 2 weeks to 2 years. In controls the mean duration of cough and dyspnoea ranged from 2 weeks to 5 years. General weakness or asthenia was more intense in HIV seropositive TB patients in comparison of Controls and cases. Kenya medical research institute, cohort study in 1990, reported cough, fever, dyspnoea, loose motions, loss of weight, loss of appetite, candidiasis, and itchy rash were common symptoms in HIV-TB patients. Saumya Swaminathan et al in their study reported haemoptysis 18%, oral candidiasis 38% of HIV-TB patients. Bissue F et al (J.Inter.med.1994) in their study quoted fever in91%, cough 84%, and weight loss > 10kg in 70% in HIV-TB patients. Similar observations were reported by K.C.Mohanty. (Ind.j.tub 1993)These findings were very much in agreement with the results of this study. The average duration of symptoms was 12.2 weeks, indicating that there was a delay in diagnosing tuberculosis and starting treatment. Whether the delay was at the patient or provider level needs further investigation. The duration of illness in our patients ranged from 2 weeks to 2 years. Swaminathan et al. found that the duration of illness in their cases before seeking treatment was 12 weeks. Fever, weight loss, cough, and lymphadenopathy which were consistent with studies by Kumar et al (2002) and by Putong et al.(2002) But Dey et al (2003) found rapid weight loss was most common presentation in seropositive patients, and cough was the most common symptom of TB in immunocompetent subjects. In the series reported by Mohanty et al. fever was the most common complaint, while Deivanayagam et al. (Ind.J.Tuberculosis:2001) reported cough with expectoration in majority of their patients.
TYPE OF HIV VIRUS
In this study all the 26 HIV-TB patients were found HIV-1 infection (100%). Migliori et al. (1992) found 59 (18.3%) out of 323 tuberculosis patients seropositive for HIV-1 antibody. Similar reports observed by Bonney EY et al (2008). The screening of 200 blood samples at National Institute of Virology, Pune by Indian council of medical research in 1992, identified HIV-1 infection was more frequent as compared to HIV-2 infection was very much similar to the findings of this project.
SPUTUM AFB
Out of 26 HIV seropositive tubercular patients, 17 (65.4%) patients had sputum AFB negative and 9 (34.6%) had sputum AFB positive. Beauliev et al (1993) reported sputum smear positivity in 22.8% of HIV-TB patients and in 56.2% of patients sputum AFB negative. Elliot et al (1993) similarly reported 76% sputum negative in comparison with 24% of sputum positive. Similar observations made by Kiel et al, (Chest:1989:95) Col. A K Praharaj et al (MJAFI 2004) and Levy R et al (Am.J.of Public health 1991) in their study. These studies findings were very much in agreement of findings of this project. The reason could be attributed to predominance of non-cavitatory lesions and extra-pulmonary tuberculosis in HIV patients
RADIOLOGICAL FEATURES
In this study, out of 26 seropositive TB patients 6 (23.1%) patients had normal x-ray, 12 (46.2%) patients had unilateral lesions on upper lobe, and 8 (30.7%) patients had bilateral lesions on upper lobe. 4 (15.3%) patients had cavitatory, 13(50%) patients had ill defined fibrotic lesion, 1(3.8%) patient had mililary and 2 (7.6%) patients had pleural thickening. In seronegative TB patients 29 (12.8%) had normal x-ray, 86 (38.1%) patients had unilateral lesions on upper lobe, and 111 (49.1%) patients had bilateral lesions on upper lobe. 149 (65.9%) patients had cavitatory, 35 (19.02%) patients had ill defined fibrotic lesion, 11(4.7%) patient had mililary and 16 (7.9%) patients had pleural thickening and 22 (8.7%) had hydropneumothorax. In this study we observed extensive cavitatory lesions were common in Tuberculosis patients but in Co-infected (HIV-TB) patients’ ill-defined fibrotic lesion on upper lobe were more common. The results were similar to the study published by K C Mohanty et al. (Ind.j.tub 1993). Many other studies have also reported a lower prevalence of radiological presentations in HIV-TB patients. According to Park text book of S.P.M. 16th edition, chest radiography may be less useful in people with HIV because they have less cavitations. Cavities usually develop because the immune response to tubercular bacilli leads to some destruction of lung tissue. In people with HIV, who do not have a fully functioning immune system, there is less tissue destruction and hence less cavitations was very much agreement of findings this study. The pattern of pulmonary involvement and the frequency of extra pulmonary involvement in this study were not different from other Indian reports.
DISEASES CLASSIFICATION
Out of 26 HIV seropositive TB patients, 16 (61.5%) had Pulmonary tuberculosis patients, 6 (20.1%) had extra-pulmonary tuberculosis and 4 (15.4%) had combined variety. The main site of extra-pulmonary involvement was mesenteric lymphadenopathy and abdomen (8 patients) followed by pleural (1) and cervical lymphadenopathy (1) and brain (1). ). Anuradha et al (1993) reported pleuro-pulmonary tuberculosis is more common. Houston et al (1994) reported extra-pulmonary tuberculosis more common than pulmonary tuberculosis. NACO, Govt. of India has reported in 200, TB as the commonest opportunistic infection (62.3%) in the HIV infected persons. The incidence of combined pulmonary and extra pulmonary TB infection was significantly higher in the seropositive patients, a finding that is consistent with a study by Jones et al. (Am Rev Respir Dis 1993) The findings of this thesis were very much agreement of the above studies.
CATEGORY OF TB
In this study we found 69.2% of cases (18 patients) were found in Category I, 27% of cases (7 patients) found in Category 2, and 3.8% of cases (1 patient) found in category 3. Maximum number of cases found in category I. Range et al (1996) reported an increase of HIV reactivity in newly registered tuberculosis patients 33% to 46%. Mohanty et al. (Ind.j.tub 1993) reported 5.89% of new cases of pulmonary tuberculosis HIV infection. Anastasias et al (International journal of tuberculosis and lung diseases 1997) made a retrospective study of 295 patients from 1991 to 1994 in Durban among the group of highest risk for HIV infection and reported the prevalence of HIV infection was 13.1% in patients with drug resistant tuberculosis and 14.9% in patients with drug sensitive tuberculosis. The above finding were very much agreement of findings of dissertation.
CD4 CELL COUNT
In this study of CD4 cell count, 7 (26.9%) patients were found in the category range of 51 – 100 which includes 5 (21.3%) males and 2(28.6%) females. In this range we found 3 (18.8%) pulmonary, 2 (33.3%) extra pulmonary and 2(50%) combined tuberculosis patients. In the range 101 – 200, we found 12 (46.2%) (10 (52.6%) males and 2 (28.6%) females) cases, in which 9 (56.2%) were pulmonary, 2 (50%) combined and 1 (16.7%) extra-pulmonary. In the range 201 – 300 we found 7 (26.9%) (4 (21.1%) males and 3 (42.8%) females) cases, of which 4 pulmonary and 3 extra-pulmonary. The mean CD4 cell count was 182. In this study we observed, CD4 Cell count was lowest less than 100/cmm in those patients with combined (pulmonary and extra pulmonary) lesions and all 26 our patients presented with an initial CD4 count of less than 300/µl consistent with many studies such as Sharma sk et al ((2004). Badri et al from South Africa reported most of the TB affected patients (67%) had CD4 level of more than 200/cmm. This could be attributed to late presentation primarily due to patient ignorance and lack of suspicion at primary health care level.
CONCLUSIONS
The present study has shown that the prevalence of HIV infection among tuberculosis patients was very high in compare of non-tuberculosis patients having similar clinical features. The extent of prevalence was 10.3% in tuberculosis patients. This is of great concern especially as it might affect both patient management and public health prospective.
Despite the synergy between the human immunodeficiency virus (HIV) and tuberculosis (TB) epidemics, the public health responses have largely been separate. Intensive efforts and early diagnosis of HIV infection among tuberculosis patients was crucial for holistic management of HIV-TB patients. With this study screening of HIV antibodies in TB patients adds one more classification, which will be more helpful in predicting prognosis of disease.
Classification
TB: it is assumed all TB cases (pulmonary and extra-pulmonary) were curable. It can be easily diagnosed by AFB sputum and x-ray chest PA View
Resistant TB: it includes MDR-TB and XDR-TB, which can be easily predicted with the help of previous prescriptions. Management of Resistant TB was beyond the reach of family physician and can be referred higher centre.
HIV-TB: Can be easily diagnosed in TB patients by rapid card tests. Beside ATT it requires services of nearest ART centre.
Knowledge of HIV status in a TB patient is critical from both patient and public health perspectives. In those patients who test seropositive for HIV, better care can be provided in the form of effective combined antitubercular (ATT) therapy and antiretroviral treatment. ATT was alone insufficient for the treatment of HIV seropositive TB and it was observed during this study that curative outcome was more with addition of antiretroviral therapy. If a HIV-positive TB patient on ATT worsens or fails to improve with therapy, the possibility of other co-existing opportunistic infections or immune reconstitution syndrome should be considered. Knowledge of a person's HIV serostatus also provides the opportunity to administer prophylaxis for opportunistic infections and thereby reduces morbidity and mortality. The spouse and relatives of HIV-seropositve patients may also be counseled on HIV infection and its modes of transmission and prognosis, preventing the spread of infection. Spouses may be educated on safe sex practices and may be offered testing themselves.
What is already known on the topic?
Tuberculosis is the commonest opportunistic infection of HIV infection or AIDS
What this study adds
HIV – TB was on the rise. So routine screening of TB suspects were necessary for Holistic management of TB and HIV-TB patients.
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