Hepatitis B follow-up among Indochinese refugees.

During 1979 and 1980 the Department of National Health and Welfare carried out a survey and later routine testing to determine the prevalence of serologic markers of hepatitis B in Indochinese refugees entering Canada. Between March and July 1981 the hepatitis-B-marker status of 220 selected refugees in the Ottawa-Hull area was reassessed. Overall, 173 (79%) of the participants had the same serologic markers when retested, but in 47 (21%) the markers had changed. The most significant changes were the loss of antigenemia in 22% of those who had been HBsAg-positive and the appearance of evidence of infection in 18% of those who had been seronegative. Most of these changes occurred among persons under 30 years of age, especially females aged 10 to 19 years.     

Prevalence of hepatitis B markers in Indochinese refugees.

The prevalence of hepatitis B surface antigen (HBsAg) in 14 347 Indochinese refugees was 11.6%; the rate was significantly higher (P less than 0.01) in males (14.0%) than in females (8.8%). Most of the HBsAg-positive refugees were in the age group 20 to 29 years. Antibody to HBsAg was detected in 50.9% of the males and 46.6% of the females, a significant difference (P less than 0.01). Antibody to core antigen alone was found in 2.4% of the males and 2.2% of the females. The cumulative prevalence of one or more hepatitis B markers was significantly higher (P less than 0.001) in the males (67.3%) than in the females (57.5%). The hepatitis B e antigen and its antibody were detected in 54.8% and 39.2% respectively of 1050 HBsAg-positive blood samples. The adw, adr and ayw determinants of HBsAg were found in 23%, 35% and 42% respectively of 74 samples.     

Active tuberculosis in Indochinese refugees in British Columbia.

The incidence of active tuberculosis in 8692 Indochinese refugees admitted to British Columbia between 1979 and 1981 was reviewed. In the first 3 months after entry into the province the rate was extremely high--estimated at 1890/100 000 (126 times the provincial average). A large proportion of these cases were of primary or minimal pulmonary tuberculosis. However, although the proportion of cases of minimal pulmonary tuberculosis was twice the provincial average, the proportion of these cases that were confirmed by culture was only one third the provincial average; this suggests some overdiagnosis in this period. In the subsequent 21 months of residence the incidence of active tuberculosis was also high, at 353/100 000, which was more than 20 times the provincial average. The distribution of cases by severity was closer to the provincial distribution in this period, but advanced disease accounted for a far smaller proportion of cases in both periods than it did in 1980 in the entire province.     

Mental health and illness in Vietnamese refugees.

Despite their impressive progress in adapting to American life, many Vietnamese still suffer from wartime experiences, culture shock, the loss of loved ones, and economic hardship. Although this trauma creates substantial mental health needs, culture, experience, and the complexity of the American resettlement system often block obtaining assistance. Vietnamese mental health needs are best understood in terms of the family unit, which is extended, collectivistic, and patriarchal. Many refugees suffer from broken family status. They also experience role reversals wherein the increased social and economic power of women and children (versus men and adults) disrupts the traditional family ethos. Finally, cultural conflicts often make communication between practitioners and clients difficult and obscure central issues in mental health treatment. Rather than treating symptoms alone, mental health workers should acknowledge the cultural, familial, and historical context of Vietnamese refugees.     

Health issues of Afghan refugees in California.

Since the 1979 Soviet invasion of Afghanistan, more than 6 million Afghan refugees have become the world''s largest refugee population. Although refugees in Pakistan and Iran are now beginning to repatriate, continuing political turmoil in Afghanistan and children''s acculturation and educational opportunities will keep many Afghans in the United States permanently. Although there are no accurate statistics, local resettlement agencies and Afghan community leaders estimate that there are 10,000 to 35,000 Afghans in northern California. They suffer from a variety of problems common to refugees: language, economic and occupational problems, and substantial challenges in psychological, family, social, and cultural adjustment to the United States. Although many Afghans are doing well, many others have depression, psychosomatic symptoms, and posttraumatic stress disorder.     

Examining genetic diversity and identifying polymorphic microsatellite markers for noninvasive genetic sampling of the Indochinese leopard (Panthera pardus delacouri)

Indochinese leopard (Panthera pardus delacouri) is one of the least-known leopard subspecies and occurs in mainland South-east Asia. Given the elusive nature, low density, and large movement ranges of leopard, noninvasive genetic sampling may be an effective approach for studying this subspecies. We examined the potential for 18 microsatellite loci to allow reliable identification of noninvasively collected leopard samples based on feces collected in eastern Cambodia. The expected heterozygosity calculated from 5 to 7 leopard individuals ranged from 0.49 to 0.91 with an average of 0.73, showing a high level of genetic diversity. Only the five most informative loci decreased the probability of identity for siblings (P_ID-sib) to less than 0.01, which would be sufficient for abundance estimation. A further increase of the number of loci up to 8–10 decreased the P_ID-sib to the level of 0.001–0.0001, which may be useful in cases of parentage analysis or forensic analysis. The microsatellite markers shown in the present study achieved a sufficient level of accuracy for individual identification, and thus, will be useful for examining abundance, genetic structure, or relatedness of the Indochinese leopard in future.     

Hepatitis B virus markers and lymphocyte populations in the asymptomatic multiple-drug addict

The authors have studied in particular hepatitis B virus markers and the ratio of OKT4+/OKT8+ cells in two subgroups of 52 deprived asymptomatic drug addicts. In the group 1 (deprived for 19 days on an average), 52% of the subjects showed a ratio of OKT4+/OKT8+ less than 1, whereas in the group 2 (deprived for 30 months on an average), this percentage is only of 25%. HBV markers were present in 90% of the subjects in each group. We would like to point out the high frequency of the anti-HBc positivity without other markers in these two groups, respectively 20% in the group 1 and 32% in the group 2. These results emphasize the interest in screening systematically this marker in all blood donors.     

Intestinal parasites in southeast Asian refugees two years after immigration.

We collected stool specimens from 2,520 Southeast Asian refugees who had resided in the United States for an average of 2.1 years. More than half reported receiving prior treatment of parasites. At least one parasite was discovered in 32%, and multiple parasites were found in 8% of patients. Hookworm, Giardia, Strongyloides, and Hymenolepis nana were most commonly found. In comparison to studies done at the time of immigration, all parasites had decreased in frequency, but Giardia, hookworm, and H nana remain common. Although initial screening efforts may have failed to identify substantial numbers of infected refugees, poor compliance with treatment may also explain the persistence of intestinal parasites in our patients. The continued presence of Giardia and H nana, especially among children, may be explained by person-to-person transmission or autoinfection.