Anopheles diversity, biting behaviour and transmission potential in forest and farm environments of Gia Lai province, Vietnam.

BACKGROUND: Despite recent reductions in Vietnam, malaria transmission persists in some areas in forests and farmlands where a high density of Anopheles mosquitoes relative to other environments occurs. To inform effective malaria control measures, it is important to understand vector bionomics and the malaria transmission role of Anopheles spp. in the highland regions of Vietnam. This study was conducted to quantify the abundance, composition and biting behaviour of the Anopheles mosquito population, and the proportion of Plasmodium spp. infected mosquitoes collected from forest and agricultural farm sites in Gia Lai province, Vietnam. METHODS: Forest and agricultural farm sites in Gia Lai province were selected for mosquito collections (total eight sites). Mosquito collection was performed by Human-baited Double Net Trap (HDNT), animal-baited traps (ABT) using cattle, and CDC light traps. Captured mosquitoes were identified morphologically, and salivary glands of Anopheles mosquitoes were examined for sporozoites using microscopy. Plasmodium infection was determined by Polymerase Chain Reaction (PCR), and identification of blood meal type was determined by PCR and diffuse serum agglutination assay. RESULTS: A total of 1815 Anopheles mosquitoes belonging to 19 species were collected by ABT (n = 1169), HDNT (n = 471) and CDC light trap (n = 175). Anopheles abundance and diversity varied by district and environment. Capture by HDNT of Anopheles of vectorial concern was observed between early evening and early morning. Plasmodium vivax infection was determined by PCR in two Anopheles dirus specimens captured by HDNT in forest sites. Blood from a range of hosts could, including human blood, could be detected in species considered primary and secondary vectors An. dirus, and Anopheles aconitus, and Anopheles maculatus, respectively. CONCLUSIONS: A low number of Anopheles spp. considered primary vectors of concern and very low numbers of Plasmodium spp. infected Anopheles mosquitoes were captured at the end of the rainy season in the Central Highlands of Vietnam. However, capture species of vectorial concern by HDNT throughout the early to late evening demonstrates that use of additional personal protective measures could supplement current preventative measures, such as bed nets to prevent exposure to vectors of concern in this region.

Evaluating the effects of two alcohol reduction counseling interventions on intimate partner violence perpetration: secondary analysis of a three-arm randomized controlled trial among Vietnamese men with HIV.

BACKGROUND AND AIMS: Evidence suggests that alcohol reduction interventions decrease intimate partner violence (IPV) perpetration, although this remains untested in low- and middle-income countries and among men with human immunodeficiency virus (HIV). This study evaluates the effectiveness of alcohol reduction counseling interventions on IPV perpetration among men on anti-retroviral therapy (ART) and tests whether alcohol use explains the intervention effects. DESIGN: Secondary analysis of data from a three-arm randomized controlled trial among ART patients with hazardous alcohol use. Participants were recruited from March 2016 to May 2017. SETTING: Thai Nguyen, Vietnam. PARTICIPANTS, INTERVENTIONS AND COMPARATORS: Male participants (n = 426). Participants received a two-session brief intervention (BI), a six-session combined intervention (CoI) or the standard of care (SOC), comprising alcohol treatment referrals. Alcohol reduction counseling interventions were guided by cognitive-behavioral therapy and motivational enhancement therapy delivered by psychosocial counselors over 3 months. MEASUREMENTS: IPV perpetration was measured using the shortened Conflict Tactics Scale 2 and alcohol use was measured using timeline followback. FINDINGS: BI and CoI participants reported reduced IPV perpetration at 3 months compared with SOC participants [BI: adjusted odds ratio (aOR) = 0.27, 95% confidence interval (CI) = 0.11, 0.65; CoI: aOR = 0.50, 95% CI = 0.22, 1.13]; the association was only significant for the BI group. Intervention effects were not sustained at 6 and 12 months. There was little evidence that alcohol use acted as a mediator (indirect effect, BI: aOR = 0.84, 95% CI = 0.63, 1.04; indirect effect, CoI: aOR = 0.86, 95% CI = 0.66, 1.03). CONCLUSIONS: Among Vietnamese men receiving anti-retroviral therapy, alcohol reduction counseling interventions appeared to reduce intimate partner violence perpetration immediately post-intervention, but reductions were not sustained at 6 and 12 months and were not explained by alcohol reduction.

Alcohol use, depressive symptoms, and intimate partner violence perpetration: A longitudinal analysis among men with HIV in northern Vietnam.

BACKGROUND: While the link between alcohol use and male-perpetrated intimate partner violence (IPV) has been well-established, research is needed to test whether psychosocial factors interact with alcohol use to exacerbate IPV perpetration. We tested whether depressive symptoms influenced the strength and/or direction of the alcohol-IPV relationship among men with HIV in Vietnam. METHODS: This study is a secondary analysis using data from a randomized controlled trial conducted in Thai Nguyen, Vietnam. Participants were clinic patients with HIV and hazardous alcohol use. Questionnaires were administered at baseline, three, six, and 12 months. Alcohol use was assessed as proportion of days alcohol abstinent. Analyses were restricted to males who reported being married/cohabitating at baseline (N = 313). Multilevel growth models were used to test whether time-varying depressive symptoms modified the time-varying effect of alcohol use on IPV perpetration. RESULTS: Time-varying depressive symptoms modified the effect of proportion of days alcohol abstinent on IPV perpetration. However, the pattern of effect modification was not as expected, as reporting depressive symptoms weakened the alcohol-IPV relationship. At times when participants screened negative for depressive symptoms, those who reported higher proportion of days alcohol abstinent than usual had significantly lower odds of IPV perpetration (Odds Ratio [OR] = 0.17, 95% Confidence Interval 0.06, 0.45, p = 0.0004). At times when participants screened positive for depressive symptoms, there was no observed effect of alcohol use on IPV perpetration (OR = 4.28, 95% CI 0.80, 22.78, p = 0.09). CONCLUSION: The findings highlight the complex nature of the alcohol-IPV relationship and the need to investigate the intersection between hazardous drinking, mental health, and IPV. Men who concurrently report depressive symptoms and heightened alcohol use may be socially isolated from an intimate partner or experiencing fatigue, leading to less alcohol-related IPV perpetration. Mental health interventions addressing depression and alcohol misuse integrated into HIV services may reduce IPV perpetration.

Longitudinal analysis of alcohol use and intimate partner violence perpetration among men with HIV in northern Vietnam.

BACKGROUND: Alcohol use is a known risk factor for male-perpetrated intimate partner violence (IPV), although few studies have been conducted globally and among men with HIV (MWH). We estimated the longitudinal effects of alcohol use on IPV perpetration among MWH. METHODS: This study is a secondary analysis of randomized controlled trial data among male and female antiretroviral treatment patients with hazardous alcohol use in Thai Nguyen, Vietnam. Analyses were restricted to male participants who were married/cohabitating (N = 313). Alcohol use was assessed as proportion days alcohol abstinent, heavy drinking, and alcohol use disorder (AUD) using the Timeline Followback and Mini International Neuropsychiatric Interview questionnaire. Multilevel modeling was used to estimate the effects of higher versus lower average alcohol use on IPV perpetration (between-person effects) and the effects of time-specific deviations in alcohol use on IPV perpetration (within-person effects). RESULTS: Participants with higher average proportion days alcohol abstinent had decreased odds of IPV perpetration (adjusted Odds Ratio [aOR] = 0.43, p = 0.03) and those with higher average heavy drinking and AUD had increased odds of IPV perpetration (Heavy drinking: aOR = 1.05, p = 0.002; AUD: aOR = 4.74, p < 0.0001). Time-specific increases in proportion days alcohol abstinent were associated with decreased odds of IPV perpetration (aOR = 0.39, p = 0.02) and time-specific increases in AUD were associated with increased odds of IPV perpetration (aOR = 2.95, p = 0.001). Within-person effects for heavy drinking were non-significant. CONCLUSIONS: Alcohol use is associated with IPV perpetration among Vietnamese men with HIV. In this context, AUD and frequent drinking are stronger correlates of IPV perpetration as compared to heavy drinking.

Depression and coping strategies among Vietnamese women living with HIV: A qualitative study.

Women living with HIV (WLWH) are more likely to suffer from depression than seronegative women and are also more likely to suffer from depression than men living with HIV. There is limited depression research with WLWH in Vietnam. Twenty in-depth interviews with WLWH were conducted to identify pathways leading to depression and coping strategies for depression. Participants were recruited from an antiretroviral treatment clinic in northern Vietnam. Audio-recorded interviews were transcribed, translated, and analysed to identify key themes. All participants reported sudden loss of social support, debilitating depression, and suicidal ideation in the first six months after HIV diagnosis. While some were able to cope with their status after several months, others continued to struggle due to HIV-related stigma that was perceived as more isolating for WLWH than for men. Women who were able to effectively cope with depression found ways to re-establish connections to family and community. Interventions to improve mental wellbeing should link WLWH to mental health services immediately after diagnosis and address loss of support and stigma, as they contributed to the onset and persistence of depression after HIV diagnosis. Community-level HIV stigma reduction interventions may also help repair broken social bonds and foster new ones.

A Qualitative Study With Women Living With HIV on Perceived Gender Norms and Experiences of Intimate Partner Violence in Northern Vietnam.

Although the prevalence of intimate partner violence (IPV) in Southeast Asia is one of the highest in the world, IPV remains understudied in the region, especially among women living with HIV (WLWH). This study aims to understand how gender and violence norms influence how WLWH interpret and prioritize violence as a health issue. We also explore whether HIV disclosure was seen as a trigger for IPV. We conducted in-depth interviews with 20 WLWH (median age = 35.5 years; range = 28-54 years) in northern Vietnam. Participants were recruited from an outpatient antiretroviral treatment (ART) clinic. Semi-structured interviews were transcribed, translated, and analyzed to identify themes using a gender-focused theoretical framework. Twelve participants reported experiencing IPV by their current or former husbands, most of which occurred before their HIV diagnoses. Only one participant felt her HIV status was a factor for the IPV she experienced; the remaining participants did not explicitly link IPV and HIV. None expressed fear or experience of IPV after disclosing to their husbands. When asked about a woman's role in society, the majority spoke about the responsibility to build family harmony by doing housework, raising children, making a steady income, and being faithful to her husband. Participants viewed marital conflict as the woman's problem to avoid by acting docile or to resolve peacefully by bearing violence quietly. Almost all reported contracting HIV from their husbands. Regardless of whether their children were infected (n = 8) or not (n = 10), participants spoke about being compelled to initiate and adhere to ART to care for their children emotionally and financially. In the context of Vietnamese gender norms, participants expressed low urgency for help-seeking after experiencing IPV and high urgency for help-seeking after being diagnosed with HIV. Multilevel interventions are needed to shift social norms around acceptability of IPV.

Cultural Adaptation of 2 Evidence-Based Alcohol Interventions for Antiretroviral Treatment Clinic Patients in Vietnam.

In Vietnam where alcohol use is culturally normative and little treatment is available, persons living with HIV (PLWH) who consume alcohol at unhealthy levels are at greatly increased risk for negative health outcomes. We describe the first systematic adaptation of 2 evidence-based alcohol interventions for use in Vietnam: a combined motivational enhancement therapy/cognitive behavioral therapy and a brief alcohol intervention. Using the situated information, motivation and behavioral skills model, and systematic procedures for tailoring evidence-based treatments, we identified core intervention content to be preserved and key characteristics to be tailored for relevance to the clinical setting. We describe the use of in-depth interviews with antiretroviral treatment clients and providers, expert input, and counselor training procedures to develop tailored manuals for counselors and clients. Adapting evidence-based alcohol treatments for global settings is facilitated by the use of a model of behavior change and systematic procedures to operationalize the approach.

Social Desirability Response Bias and Other Factors That May Influence Self-Reports of Substance Use and HIV Risk Behaviors: A Qualitative Study of Drug Users in Vietnam.

The accuracy of self-report data may be marred by a range of cognitive and motivational biases, including social desirability response bias. The current study used qualitative interviews to examine self-report response biases among participants in a large randomized clinical trial in Vietnam. A sample of study participants was reinterviewed. The vast majority reported being truthful and emphasized the importance of rapport with the study staff for achieving veridical data. However, some stated that rapport may lead to under reporting of risk behaviors in order not to disappoint study staff. Other factors that appeared to influence accuracy of self-reports include fear that the information may be divulged, desire to enroll in the study, length of the survey, and memory. There are several methods that can be employed to reduce response biases, and future studies should systematically address response bias and include methods to assess whether approaches and survey items are effective in improving accuracy of self-report data.