Seroprevalence of hepatitis B and C virus infections among Lao blood donors.

There have been no previous reports of the prevalence of hepatatis B virus (HBV) and hepatitis C virus (HCV) infections in Lao PDR. From 2003 to 2005, 13,897 first-time blood donors were screened for the presence of hepatitis B surface antigen (HBsAg) and hepatitis C virus antibody (anti-HCV). The seroprevalence of HBsAg positive blood donors was 8.7%. The prevalence among males (9.7%) was higher than in females (6.2%). The prevalence of anti-HCV positive blood donors was 1.1%, with no significant differences between males (1.1%) and females (1.0%). Annual positive rates for HBsAg and anti-HCV during the years 2003 to 2005 did not differ significantly. Lao PDR has a high endemicity of HBV carriers (8.7%). Dual infection with HBV and HCV was 0.12%. For preventing HBV infection, the country introduced DPT-Hepatitis B vaccines into the National Immunization Program in 2001. The large reservoir of HBV and HCV infections will cause an enormous burden of patients with cirrhosis and hepatocellular carcinoma in the future.

Low prevalence of hepatitis B virus and hepatitis C virus co-infection in patients with human immunodeficiency virus in Northern India.

AIM: To study the prevalence of HBV and HCV co-infection in patients with HIV attending a referral hospital in Northern India. METHODS AND MATERIAL: The study cohort included six hundred and twenty consecutive HIV infected patients who were studied for co-infection with HBV/HCV or both. It included four hundred and seventy two male and one hundred and forty eight female patients between the age group 25-50 years. HBV and HCV infection was diagnosed by ELISA. Other routine investigations were also done. RESULTS: Out of a total of 620 consecutive HIV infected patients studied, HBV co-infection was detected in 14/ 620 (2.25%) patients and HCV co-infection in 10/620 (1.61%) patients and dual co-infection (HBV/HCV) in 1/620(0.16%). The mode of transmission of HBV was sexual contact in all (100%), while for HCV it was sexual contact in 5 patients (50%), blood transfusion in 4 patients (40%) and intravenous drug use (IDU) in 1 patient (10%). CONCLUSION: The prevalence of co-infection with HBV/HCV is much lower in our study population as compared to that reported in Western literature.

Risk behaviors and life skills towards sexually transmitted and blood-borne infections among Thai married couples.

OBJECTIVE: A cross-sectional study of 706 couples or 1,412 individuals with age 15-44 years was carried out to assess risk behaviors, life skill level, and its relationship, and to investigate HBV seromarkers, anti-HCV, and anti-HIV among individuals who voluntarily participated in blood screening. MATERIAL AND METHOD: All studied participants who voluntarily participated and signed consents were interviewed about risk behaviors and life skills. Only 166 individuals voluntarily participated in blood screening for HBVseromarkers, anti-HCV, and anti-HIV RESULTS: The results revealed that, of 1,412 individuals, 15.30% had a history of regular alcohol consumption, 11.26% had tattoos, 5.10% had a history of extramarital sex without using condoms, and 2.83% had a history of sex services. Males had significantly higher risk behavior scores than females, p < 0.0001. For life skills, 78.71% of the participants had the middle level of life skill scores. Males had relatively lower life skill scores than females, but it was not significant. The relationship between the levels of risk behavior scores and life skill scores showed significant association, p < 0.0001. Results from blood screening showed 31.33% ofHB V seromarker positive, 6.63% ofHBsAg positive, 1.21% ofanti-HCV positive, and 1.21% ofanti-HIV positive. CONCLUSION: The present study showed the significant association between the levels of life skill scores and the levels of risk behavior scores. The participants who had higher level of life skill scores had lower level of risk behavior scores.

Etiology and pathogenesis of bloodstream infections associated with the use of long-term central vascular catheter (CVC) in patients who undergone gastrointestinal surgery

CVC is the main factor of risk of bloodstream infections. This study purpose was determining both etiology and pathogenesis of these infections in 80 patients who undergone gastrointestinal surgery and who worn long lasting CVC, in the institution HC-UFU. Cultures were made in nostril, skin of the insertion site, tip and catheter hub, in addition to hemoculture in those suspects of sepsis. The colonization incidence rate of the catheter tip was 12.5/ 1,000 catheter days and the CVC associate infection rate was 3.1/1,000 catheter days. Frequencies of skin, hub and catheter tip colonization were 13.8 percent, 8.9 percent and 13.3 percent, respectively. Coagulase-negative Staphylococci were the most found microorganisms in nostril (74 percent), skin (45.4 percent) and hub (75 percent) and Gram-negative bacilli (50 percent), followed by S. aureus (25 percent) the most common ones in catheter tip. Approximately 51 percent of patients received antibiotics and most of them (53.7 percent) had therapeutic purpose. The frequency of patients with clinical sepsis was 27.5 percent. Three cases of bacteremia associated with the use of CVC were detected (3.8 percent), with S. aureus in two of them and K. pneumoniae in the third one. There was not seen any association of skin and hub colonization with their presence in the catheter tip and in the blood of these patients, but S. aureus was recovered from nostril of those with sepsis by this pathogenic agent. A greater concern is suggested over preventive measures and control of these primary and secondary bloodstream, as well as catheter tip colonization.

PCR detection of four periodontopathogens from subgingival clinical samples

In this study, A. actinomycetemcomitans, B. forsythus, P. gingivalis and F. nucleatum were identified from subgingival plaque from 50 periodontal patients and 50 healthy subjects. Subgingival clinical samples were collected with sterilized paper points and transported in VMGA III. From all the diluted clinical samples (1:10), DNA was obtained by boiling, and after centrifugation the supernatant was used as template. Specific primers for each bacterial species were used in PCR. PCR amplification was sensitive to identify these organisms. PCR products from each species showed a single band and can be used to identify periodontal organisms from clinical specimens. PCR detection odds ratio values for A. actinomycetemcomitans and B. forsythus were significantly associated with disease showing a higher OR values for B. forsythus (2.97, 95 percent CI 1.88 - 4.70). These results suggest a strong association among the studied species and the periodontal lesion.

Prevalence of Bacterial Pathogens and Susceptibility Patterns from clinical sources in Trinidad

During a 12-month period (January-December, 1997), bacterial isolates of specimens from in-patients and out-patients of the Eric Wiliams Sciences Complex (EWMSC) were reviewed. A total of 3,513 specimens were processed, 43.1 percent from in-patients and 56.9 percent from out-patients. Of the 3,513 specimens, 1,129 (32.1 percent) yielded positive cultures. Micro-organisms from wounds, sputum and genital tract accounted for 90.2 percent, 51.5 percent and 31.8 percent, respectively, of all isolates. E coli (17.4 percent) and Enterococci (12.2percent) were the predominant isolates and were also the major pathogens from blood stream infections, 25.8 percent and 18.2 percent, respectively, followed by P aeruginosa, 15.2 percent. High levels of resistance were seen to ampicillin, augmentin (amoxicillin-clavulanic acid) and tetracycline. The most effective antibiotics were ceftazidime (no resistance in E coli Citrobacter spp, non-typhoidal Salmonella and Group B streptococci, 63.2 percent resistance in Acinetobacter spp, 15.2 percent in Enterobacter spp, 17.4 percent in Klebsiella spp.], erythromycin (no resistance in Enterobacter and Citrobacter spp, and 89.5 percent in Acinetobacter (spp), erythromycin (no resistance in Groups A and B streptococci, 85.1 percent in S aurens and S pneumoniae). The spectrum of isolates will provide clinicians with data on which to base their "best guess" aetiologic agent and choice of antibiotics when faced with infectious diseases in areas where laboratory assistance is not readily available.