Risk factors for hepatitis C virus infection in male adults in Rawalpindi-Islamabad, Pakistan

High HCV seroprevalence and HIV drug use risk behaviors among injection drug users in Pakistan

Introduction

HIV and HCV risk behaviors among injection drug users (IDUs) in two urban areas in Pakistan were identified.

Methods

From May to June 2003, 351 IDUs recruited in harm-reduction drop-in centers operated by a national non-governmental organization in Lahore (Punjab province) and Quetta (Balochistan province) completed an interviewer-administered survey and were tested for HIV and HCV. Multivariable logistic regression identified correlates of seropositivity, stratifying by site. All study participants provided written, informed consent.

Results

All but two were male; median age was 35 and <50% had any formal education. None were HIV-positive; HCV seroprevalence was 88%. HIV awareness was relatively high, but HCV awareness was low (19%). Injection behaviors and percutaneous exposures such as drawing blood into a syringe while injecting ('jerking'), longer duration of injection, and receiving a street barber shave were significantly associated with HCV seropositivity.

Discussion

Despite no HIV cases, overall HCV prevalence was very high, signaling the potential for a future HIV epidemic among IDUs across Pakistan. Programs to increase needle exchange, drug treatment and HIV and HCV awareness should be implemented immediately.

Population beliefs about the efficacy of injections in Pakistan's Sindh province

OBJECTIVE

Reused syringes have been identified as a major risk factor for hepatitis B and C in Pakistan, a country facing a growing epidemic of these infections. We conducted this study to identify factors associated with receiving at least one injection during the past 3 months in an urban and a rural area in the Sindh province of Pakistan.

METHODS

A population-based cross-sectional study of individuals aged 3 months was conducted in 34 clusters in an urban and a rural setting. Information was obtained on the number of contacts with healthcare providers and the number of injections received during the past 3 months. Beliefs about the efficacy of injections were also tested. Multivariable logistic regression analysis was performed to identify factors associated with receiving at least one injection during the past 3 months.

RESULTS

Of 1150 subjects who participated in the study, 848 (74%) reported having received at least one injection during the past 3 months. Seventy-one percent (815/1150) believed that injections act faster than oral drugs and relieve symptoms quickly. There was a lack of risk perception among the participants: 19% (222/1150) believed that injections involve less risk than do oral drugs. Multivariable logistic regression analysis revealed that individuals who had visited unqualified practitioners (adjusted OR=6.1; 95% CI: 2.6-14.1) or general practitioners (adjusted OR=3.4; 95% CI: 1.9-6.0) were more likely to have received an injection. Belief that 'injections act faster and relieve symptoms quickly' had a multiplicative interaction with the area of dwelling: people in rural areas who held this belief were more likely to receive injections than people who did not hold this belief and were living in urban areas.

CONCLUSIONS

In Pakistan, people's lack of awareness of risks associated with injections and their strong belief in the fast action of injections are driving injection overuse. These factors are supplemented by general practitioners' and unqualified providers' inclinations to prescribe more injections. Efforts must be made to include the unqualified practitioners in any interventions aimed to reduce injection overuse in Pakistan.

Hepatitis B and C: prevalence and risk factors associated with seropositivity among children in Karachi, Pakistan

Background

Infections with hepatitis B virus (HBV) and hepatitis C virus (HCV) can lead to chronic liver disease and hepato-cellular carcinoma (HCC). This cross-sectional study estimated the prevalence and identified risk factors associated with Hepatitis B surface antigen (HBsAg) and HCV antibody (anti-HCV) sero-positivity among children 1 to 15 years of age.

Methods

The study targeted the low to middle socioeconomic population that comprises 80% to 85% of the population. Consent was obtained from parents of the eligible children before administering questionnaire and collected a blood sample for anti-HCV and HBsAg serology.

Results

3533 children were screened for HBsAg and anti-HCV. 1826 (52 %) were males. 65 (1.8 %) were positive for HBsAg, male to female ratio 38:27; mean age 10 ± 4 years. 55 (1.6 %) were positive for anti-HCV with a mean age 9 ± 4 years. 3 (0.11%) boys were positive for both HBsAg and anti-HCV. The overall infection rate was 3.3 % in the studied population. Hepatitis BsAg was more prevalent in subjects who received therapeutic injections 45 (69.2%) positive [Odd Ratio OR = 2.2; 95% Confidence interval CI: 1.3–3.6] inspite of using new needle and syringe 44 (67.7%) positive [OR = 2.2; 95% CI: 1.3–3.7] and vaccination in the government healthcare facilities 46 (70.7 %) positive with [OR = 3.0; 95% CI: 1.4–6.4]. These factors were not significant in anti-HCV positive cases.

Conclusion

There is a need to educate general population regarding HBV and HCV infection and risks associated with inappropriate therapeutic injections. Hepatitis B vaccine should be administered to all newborns regardless of maternal HBsAg status.

Epidemiologic study of chronic hepatitis B virus infection in male volunteer blood donors in Karachi, Pakistan

Background

The magnitude of chronic infection with hepatitis B virus (HBV) varies substantially between the countries. A better understanding of incidence and/ or prevalence of HBV infection and associated risk factors provides insight into the transmission of this infection in the community. The purpose of this investigation was to estimate the prevalence of and to identify the risk factors associated with chronic infection with HBV, as assessed by HBV surface antigen (HBsAg) positivity, in asymptomatic volunteer male blood donors in Karachi, Pakistan.

Methods

Consecutive blood donations made at the two large blood banks between January 1, 1998 and December 31, 2002 were assessed to estimate the prevalence of HBsAg positivity. To evaluate the potential risk factors, a case-control study design was implemented; cases (HBsAg positives) and controls (HBsAg negatives), were recruited between October 15, 2001 and March 15, 2002. A pre-tested structured questionnaire was administered through trained interviewers to collect the data on hypothesized risk factors for HBV infection. Sera were tested for HBsAg using commercially available kits for enzyme linked Immunosorbant assay-III.

Results

HBsAg prevalence in the male volunteer blood donors was 2.0 % (7048/351309). Multivariate logistic regression analysis showed that after adjusting for age and ethnicity, cases were significantly more likely than controls to have received dental treatment from un-qualified dental care provider (adjusted odds ratio (OR) = 9.8; 95% confidence interval (CI): 2.1, 46.1), have received 1–5 injections (adjusted OR = 3.3; 95% CI: 1.1, 9.6), more than 5 injections (adjusted OR = 1.4; 95% CI: 1.4, 12.7) during the last five years or have received injection through a glass syringe (adjusted OR = 9.4; 95% CI: 2.6, 34.3). Injury resulted in bleeding during shaving from barbers (adjusted OR = 2.3; 95% CI: 1.1, 4.8) was also significant predictor of HBsAg positivity.

Conclusion

Prevalence of HBsAg positivity in the male volunteer blood donors in Karachi was 2%. Infection control measures in health-care settings including safe injection practices and proper sterilization techniques of medical instruments and education of barbers about the significance of sterilization of their instruments may reduce the burden of HBV infection in this and similar settings. There is also an urgent need of developing locally relevant guidelines for counseling and management of HBsAg positive blood donors.

Injection use in two districts of Pakistan: implications for disease prevention

OBJECTIVE

To estimate the annual number of injections per person in Sindh province of Pakistan and to describe their distribution with regard to prescribers, settings, and safety.

DESIGN

A population-based cross-sectional study in July-September 2001.

SETTING

Lyari, an urban town in Karachi district; and Digri, a rural subdistrict in Mirpur Khas district.

STUDY PARTICIPANTS

We selected a population-based cluster sample of 1150 individuals aged > or =3 months. We interviewed one person per household for the number of encounters they had with health care providers, number and types of injections received, safety circumstances, and cost of injections during the past 3 months. Main outcome measure. The number of injections per person per year.

RESULTS

After adjusting for age and sex, 68% of participants had received at least one injection in the previous 3 months (13.6 injections/person/year). The majority of the respondents received injections at the clinics of qualified general practitioners (n = 571, 67%) by dispensers (644, 76%). Most of the injections (n = 3446, 96%) were for curative purposes. A freshly opened syringe was used for only 454 (53%) of the injections. The average fee for receiving an injection was Rs. 51 (US$ 0.8).

CONCLUSION

Injections are overused in Pakistan's Sindh province and the ratios of injection per capita that we found are among the highest ever reported.

INTERVENTIONS

are needed to substantially reduce injection prescription among private health care providers who prescribe most of the injections received by the population.

Innovation, diffusion and safety of a medical technology: a review of the literature on injection practices

The rapid uptake of the hypodermic syringe as a medical technology by physicians in Europe and America since its introduction in the middle of the 19th century has led to a level of medical and public acceptance seldom reached by other therapeutic techniques. Presently, the developed world has clear guidelines regarding injection use and safety; in contrast, developing countries are facing the brunt of risks associated with the use of this technology, which was introduced into their societies during the early 20th century. There is now a popular demand for injections, and an alarming number of unnecessary and unsafe injections are being administered. The problem of unsafe injections is not restricted to curative injections, but includes immunizations too. The association of unsafe injections and infection transmission is quite clear, and there is an urgent need to reduce the number of required injections and make them safe. An understanding of the determinants of current injection practices in the socio-cultural-economic context is necessary in order to plan relevant and effective interventions.

Association between smallpox vaccination and hepatitis C antibody positive serology in Pakistani volunteers

GOALS

To determine whether the smallpox vaccination program has significantly contributed to the widespread prevalence of hepatitis C infection in Pakistan.

BACKGROUND

Hepatitis C virus has become a worldwide pandemic and has especially devastated developing nations such as Pakistan. There continues to be an increase in fatalities due to hepatitis C-related cirrhosis in Pakistan.

STUDY

We studied 523 volunteers in the city of Lahore to determine whether the smallpox vaccination program, which ran from 1964 to 1982 in Pakistan, may be responsible for the national surge in hepatitis C viral infection, perhaps because of repetitive use of vaccination devices without proper sterilization or to contaminated vaccine contents.

RESULTS

There was a significantly higher likelihood of hepatitis C antibody seroprevalence in individuals vaccinated for smallpox versus nonvaccinated individuals (21.0% vs. 4.6%, P < 0.001, age-adjusted odds ratio, 3.39; 95% confidence interval, 1.36-8.46). Subjects with positive hepatitis C serology were also more likely to have a history of transfusions (19.2% vs. 9.0%, P = 0.01), but anti-HCV positive serology was not significantly associated with a history of surgery or dental procedures. Following adjustment for age, sex, and history of other conditions, including transfusion, the association between prior smallpox vaccination and hepatitis C antibody seroprevalence remained strong and highly significant (multivariate adjusted odds ratio, 6.11; 95% confidence interval, 2.58-14.51).

CONCLUSION

These results suggest that the widespread prevalence of hepatitis C infection in Pakistan may be an unintended consequence of the country's smallpox vaccination program and that blood transfusion is also a significant risk factor.

Long-term improvement in unsafe injection practices following community intervention

BACKGROUND

A study in 1994 identified frequent unsafe injections as the cause of widespread hepatitis C virus infection in Hafizabad, Pakistan. A simple low cost community education program was assessed to see if it improved injection safety.

METHODS

A local health organization developed educational materials on hepatitis C including advice on how to avoid unnecessary injections and, when injections were necessary, to use a new syringe and needle. Beginning in 1995, this advice was communicated through multiple channels including health education meetings, announcements in mosques, and via pamphlets. In 1998 study workers revisited controls from the 1994 case-control study (along with three of their neighbors of a similar age) to collect information on injection practices in the previous 12 months.

RESULTS

Thirty-three percent of the study's participants in 1998 received >or=5 injections in the preceding 12 months compared to 40% of the hepatitis C virus negative controls reported in the year prior to the 1994 study (p=0.85). In 1998 52 persons (34%) brought their own syringe for their most recent injection, a practice that was unreported in 1994. Overall, in 1998 59% of patients received their most recent injection with a new syringe and needle compared to 24% in 1994 (p=0.003).

CONCLUSIONS

Following this low cost health communication effort, community members took steps to protect themselves from unsafe injections.

Risk factors for hepatitis C virus infection among blood donors in Georgia

BACKGROUND

Growing awareness about the importance of blood safety for controlling the transmission of hepatitis C virus (HCV) has helped to decrease the spread of this virus in many settings. This study was conducted in order to evaluate potential risk factors for HCV infection among blood donors in Georgia.

METHODS

The study population consisted of 553 blood donors in three major Georgian cities: Tbilisi, the capital city and Batumi and Poti, naval port cities. Risk factors were examined using a behavior questionnaire. All blood samples were initially tested using 3rd generation anti-HCV enzyme-linked immunosorbent assays and confirmed using recombinant immunoblot assays and nucleic acid testing.

RESULTS

Forty-three blood donors, 7.8%, were confirmed HCV positive. Significant risk factors included: drug injection ever (OR: 42; 95% CI: 3.2-550.7); history of hepatitis (OR: 25.9; 95% CI: 4.6-145.5); history of a previous surgical procedure (OR: 148.4; 95% CI: 26.9-817.4); blood transfusion (OR: 25.9; 95% CI: 3.2-210.9).

CONCLUSIONS

This study found a very high prevalence of HCV among blood donors in Georgia. The main risk factor for HCV infection in this population of blood donors was previous contact with contaminated blood or blood products. Reliable screening of donors and their blood is critical for controlling the further spread of HCV in Georgia.

Hepatitis C virus infection in asymptomatic male volunteer blood donors in Karachi, Pakistan

The objectives of this study were to assess the proportion of hepatitis C virus (HCV) reactors and to identify risk factors associated with HCV infection in volunteer blood donors in Karachi, Pakistan. Between 1 January 1998 and 31 December 2002, consecutive blood donations tested at two blood banks were used to assess the proportion of HCV sero-reactors donors. To evaluate the potential risk factors, a case-control study design was implemented to select cases and controls between 15 October 2001 and 15 March 2002. The overall seroprevalence of HCV in these blood donors was 1.8% (6349/35 1309). Trend analysis revealed a significant (P < 0.001) linear increase in proportions of HCV-seropositive donors from 1998 to 2002. Final multivariate logistic regression model showed that the cases were more likely than controls to have reported past hospitalization or to have received multiple injections. When a glass syringe was used to give therapeutic injections, it increased the adjusted odds of being HCV seropositive significantly more among cases than in controls and this relationship was stronger when injection was given by general medical practitioner than if the injection was given in hospital setting. Cases were more likely than controls to have reported sexual contact with multiple sexual partners. Primary prevention programmes focused on identified risk factors might help to curtail the spread of HCV infection in this community and in other similar settings in developing countries.

Managing occupational risks for hepatitis C transmission in the health care setting

Hepatitis C virus (HCV) infection is a significant contemporary health problem in the United States and elsewhere. Because it is primarily transmitted via blood, hepatitis C infection presents risks for both nosocomial transmission to patients and occupational spread to health care workers. Recent insights into the pathogenesis, immunopathogenesis, natural history, and treatment of infection caused by this unique flavivirus provide a rationale for the use of new strategies for managing occupational hepatitis C infections when they occur. This article reviews this developing information. Recently published data demonstrate success rates in the treatment of "acute hepatitis C syndrome" that approach 100\%, and although these studies are not directly applicable to all occupational infections, they may provide important clues to optimal management strategies. In addition, the article delineates approaches to the prevention of occupational exposures and also addresses the difficult issue of managing HCV-infected health care providers. The article summarizes currently available data about the nosocomial epidemiology of HCV infection and the magnitude of risk and discusses several alternatives for managing exposure and infection. No evidence supports the use of immediate postexposure prophylaxis with immunoglobulin, immunomodulators, or antiviral agents. Based on the very limited data available, the watchful waiting and preemptive therapy strategies described in detail in this article represent reasonable interim approaches to the complex problem of managing occupational HCV infections, at least until more definitive data are obtained.