Coinfections between Persistent Parasitic Neglected Tropical Diseases and Viral Infections among Prisoners from Sub-Saharan Africa and Latin America

Household profiles of neglected tropical disease symptoms among children: A latent class analysis of built-environment features of Tanzanian households using the Demographic and Health Survey

Background

While malaria and neglected tropical disease (NTD) morbidity and mortality rates among children <5 years old have decreased through public health efforts in the United Republic of Tanzania, associations between household environments and disease outcomes are relatively unknown.

Methods

We conducted latent class analysis (LCA) on 2015-2016 Tanzania Demographic Health Survey data from mothers with children <5 years old (N = 10 233) to identify NTD household risk profiles. The outcome of child NTD was assessed by mothers’ reports of recent diarrhoea, cough, treatment for enteric parasites, and fever symptoms. Household-built environment indicators included urban/rural designation, electricity access, water source, cooking fuel, flooring, wall, and roofing materials. External environmental covariates were considered to further differentiate profiles.

Results

Five profiles were identified in the sample: rural finished walls households (40.2%) with the lowest NTD risk; rural rudimentary households (20.9%) with intermediate-low NTD risk; finished material households (22.5%) with intermediate NTD risk; urban households (14.4%) with intermediate-high NTD risk and high likelihood of enteric parasites; rural finished roof/walls households (2.1%) with the highest overall NTD risk.

Conclusions

This study is among the first to use LCA to examine household environment characteristics to assess child NTD risk in Tanzania. This paper serves as a framework for community-level rapid NTD risk assessment for targeted health promotion interventions.

Multiplex peptide microarray profiling of antibody reactivity against neglected tropical diseases derived B-cell epitopes for serodiagnosis in Zimbabwe

Introduction

Peptides (B-cell epitopes) have broad applications in disease diagnosis and surveillance of pathogen exposure. In this framework, we present a pilot study to design and produce a peptide microarray for the integrated surveillance of neglected tropical diseases. The peptide microarray was evaluated against peptides derived from Ascaris lumbricoides, Necator americanus, Schistosoma haematobium, Schistosoma mansoni, Trichuris trichiura, Bacillus anthracis, Mycobacterium leprae, Wuchereria bancrofti, Rabies lyssavirus, Chlamydia trachomatis and Trypanosoma brucei.

Methods

S. haematobium was diagnosed using the urine filtration technique. S. mansoni, A. lumbricoides, N. americanus and T. trichiura were diagnosed using the Kato Katz and formal ether concentration techniques. Immunogenic peptides were retrieved from the Tackling Infection to Benefit Africa infectious diseases epitope microarray. Further peptides were predicted using ABCpred. IgG and IgM reactivity against the derived peptides were evaluated using peptide microarray multiplex immunoassays. Positive response was defined as fluorescence intensity ≥ 500 fluorescence units. Immunodominant peptides were identified using color-coded heat maps and bar graphs reflecting the obtained fluorescence signal intensities. Receiver Operating Characteristic analysis and Mann-Whitney-U test were performed to determine the diagnostic validity of the peptides.

Results

Species-specific responses with at least one peptide derived from each NTD pathogen were observed. The reactive peptides included; for S. haematobium, XP_035588858.1-206-220 and XP_035588858.1-206-220 immunodominant for IgG and IgM respectively, for S. mansoni, P20287.1-58-72 immunodominant for both antibodies and for T. trichiura, CDW52482.1-326-340 immunodominant for IgG and CDW57769.1-2017-2031 and CDW57769.1-1518-1532 immunodominant for IgM. According to ROC analysis most of the peptides selected were inaccurate; with AUC < 0.5. Some peptides had AUC values ranging from 0.5 to 0.5875 for both IgM and IgG suggesting no discrimination.

Conclusion

Multiplex peptide microarrays are a valuable tool for integrated NTDs surveillance and for screening parasites exposure in endemic areas. Species sero-reactivity observed in the study maybe indicative of exposure to the different NTDs parasites. However, although peptides with the least cross reactivity were selected there is need to validate the sero-reactivity with recombinant antigens and immune-blotting techniques such as western blotting.

Two rivals or colleagues in the liver? Hepatit B virus and Schistosoma mansoni co-infections: A systematic review and meta-analysis

BACKGROUND

Globally, hepatitis B and schistosomiasis (Mansoni) together affect about 300 million people; which cause hepatic disorders worldwide. Given that little is known about co-infections with hepatitis B and schistosoma mansoni, the present study investigates these two health problems alone and together and their possible correlation.

METHODS

A search was conducted for reports published between January 1990 and October 2020 by using Embase, Scopus, PubMed, Web of Science databases; Out of a total of 20 studies, 14 cross-sectional studies (6329 people) and 6 case-control studies (2138 individual) were reviewed. The pooled prevalence of hepatitis B virus (HBV), S.mansoni infections, and their co-infections; heterogeneity and the Odds Ratio (OR) were evaluated by Stata 11.2.

FINDINGS

Among the included studies in the inclusion criteria, the pooled prevalence of hepatitis B, S. mansoni was 34% (95% CI, 0.23-0.46), 41% (95% CI, 0.24-0.59) and their co-infections was 18% (95% CI, 0.11-0.25) by regions. The hepatitis B and S. mansoni correlation was significant in populations with schistosoma compared to control group (OR, 2.12; 95% CI, 1.36-3.30).

COMMENTARY

Our results showed that in addition to the high global prevalence of hepatitis B- S. mansoni (co) infections in the included studies, there is a significant association between them, especially in people suffering from schistosoma. These results highlight the importance of integrated interventions measurements against coexistence of parasitic and viral diseases. We know that more research studies need to be done in this field and global monitoring should be considered for the co-infection of these two important complications.

Body pack in sick bodies: a retrospective study of somatic and psychiatric comorbidities among body-packers

PURPOSE

Body-packing means concealing packets of illicit psychoactive substances in the digestive or genital system. The purpose of this paper is to investigate profiles of body-packers and comorbidities associated with body-packing.

DESIGN/METHODOLOGY/APPROACH

A retrospective study (2005-2016) was conducted among all patients hospitalized for suspicion of body-packing in the Geneva hospital prison unit (n=287). Data were extracted from medical records and included demographics, somatic/psychiatric diseases, suicidal ideation and psychological distress.

FINDINGS

Body-packers were mostly young men (mean age=33.4). A total of 42.2 percent of the participants had at least one psychiatric or somatic comorbidity reported during incarceration (somatic: 28.2 percent, psychiatric: 18.8 percent). The most frequent somatic diseases were infectious (10.5 percent), cardiovascular (10.1 percent), and endocrinological (4.2 percent) diseases, and more precisely HIV (4.5 percent), hepatitis B (3.5 percent), hepatitis C (1.4 percent), high blood pressure (8.0 percent) and diabetes (4.2 percent). The most frequent psychiatric conditions were substance use disorders (10.5 percent) and mood disorders (8.0 percent). Depressed mood/psychological distress and suicidal ideation were frequently reported during hospitalization (27.2/6.6 percent). Comorbidities were associated with demographics: Females were more likely to have somatic and psychiatric diseases detected during hospitalization in detention and participants from Western, educated, industrialized, rich and democratic countries were more likely to report diseases known before detention.

ORIGINALITY/VALUE

Body-packers bear a heavy burden of disease and psychological distress. This vulnerable subgroup of incarcerated people has been overlooked in previous research and their health needs are not correctly understood. This study was a first step to improve their health care and reintegration.