Risk and protective factors associated with multiproblem behaviours of Ethiopian young adults in Israel

Immigrants and second-generation immigrants from Ethiopia in Israel are assumed to be more vulnerable to problematic risk behaviours than host culture population. The aim of this study was to assess risk and protective factors associated with multiproblem behaviours such as committing driving violations, alcohol use, drugs use and violence among Ethiopian young adult immigrants and second-generation immigrants in Israel. This is a cross-sectional study, based on a self-reported anonymous structured questionnaire distributed to 383 Ethiopian emerging adults (mean age 25.3; SD = 3.27, 59.3% female). Multiple Problem Behavior Index (MPBI) was created from their responses to 21 risk behaviour variables including driving violations, alcohol use, Marijuana use and violence. Logistic regression to predict multiproblem behaviours was used. We found that unplanned leisure activity hours during weekends (adjusted odds ratio - AOR = 2.594, p < .01, 95% CI 1.332-5.052), excitement seeking (AOR = 2.122, p<.01, 95% CI 1.257-3.582), depression symptoms (AOR = 2.521, p < .01, 95% CI 1.491-4.261) and gender (AOR = 0.277, p < .001, 95% CI 0.164-0.469) were associated with MPBI. In contrast, racism, perceived discrimination, Israeli and Ethiopian identities were not significantly associated with MPBI after adjusting for gender and family status. These results suggest that in a minority of Ethiopian emerging adult immigrants similar to host culture populations, risk factors such as unplanned leisure activities, excitement seeking and depression symptoms are stronger and significant factors associated with multiproblem behaviours rather than racism, perceived discrimination or Israeli and Ethiopian identities. Resources should be allocated to produce appropriate intervention programs with planned content for leisure time, especially on weekends.

Decreased CD4 and increased CD8 counts with T cell activation is associated with chronic helminth infection

We have previously reported the presence of marked immune dysregulation with a dominant Th2 profile, in a population of Ethiopian immigrants (ETH) in Israel heavily infected with helminths. In order to characterize better this immune dysregulation we studied by flow cytometry the expression of several activation markers on peripheral T cell populations, and lymphocyte apoptosis, in blood samples obtained from 63 'new' ETH (recently arrived), 18 'old' ETH (> 5 years since immigration) and 34 non-Ethiopian Israelis. The main findings in the 'new' ETH group in comparison with the non-Ethiopian controls were: (i) decreased CD4 and increased CD8 lymphocyte counts; (ii) elevated levels of activated T cells (CD3, CD4 and CD8) expressing HLA-DR; (iii) decreased levels of 'naive' CD4+ cells (CD45RA+), with increased levels of 'memory' CD4+ cells (CD45RO+); (iv) decreased numbers of CD28+ CD8+ lymphocytes; (v) marked increase in lymphocyte apoptosis. These T cell alterations and activation profile remained unchanged in 10 'new' ETH in whom the helminth infections persisted for 6-11 months. In contrast, in 18 'old' ETH, without helminth infections, the T cell activation profile was within the normal range. These findings suggest that chronic helminth infections may have a profound effect on the immune system of the host that disappears after eradication of these infections and adjustment to the new environment. It should therefore be taken into consideration for every immunomodulation therapy and especially in vaccine design and trials, in regions endemic for helminth infections.

Immune dysregulation in Ethiopian immigrants in Israel: relevance to helminth infections?

The infectious disease background and particularly the helminth infections that are endemic in Africa could have profound effects on the host immune system. Studies that we have performed on an Ethiopian HIV- immigrant population that has recently reached Israel, lend support to this notion. They have indeed revealed a very high prevalence of helminth and several other infections with an extreme immune dysregulation, consisting of: (i) highly elevated plasma IgE, IgG, placental isoferritin, p75 soluble TNF receptor (sTNFR) levels and very high blood eosinophilia; (ii) increased secretion from phytohaemagglutinin (PHA)-simulated peripheral blood mononuclear cells (PBMC) of the cytokines IL-2, IL-4, IL-10 and p75 sTNFR, and decreased secretion of interferon-gamma (IFN-gamma) and IL-6; (iii) increased and decreased surface expression of p75 TNFR and IL-6 receptor on lymphocytes, respectively. The causal relationship between this immune dysregulation and the infectious background is highly suggestive, and could have far-reaching implications in the resistance to other infections.