The Effect of Single Dose Albendazole (400 Mg) Treatment on the Human Gut Microbiome of Hookworm-infected Ghanaian Individuals

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Abstract Microbes play an important role in human gut homeostasis, metabolic, immunologic and physiopathology of the body. A longitudinal study conducted during 2018–2021 in the Kintampo North Municipality in Ghana demonstrated low hookworm infection cure rates following treatment with a single dose of 400 mg albendazole in some communities. To investigate associations between hookworm infection and the gut microbiome, we examined faecal samples from consented participants who were either cured or remained infected after treatment. At each time point, fecal samples were collected prior to and 10–14 days after albendazole treatment of those who were infected. We used 16S rRNA amplicon sequencing of DNA extracted from stool samples to investigate the composition and biodiversity of the gut microbiota and to identify potential microbial biomarkers associated with treatment outcomes. Results of the study showed an association between hookworm infection and increased species richness. It also demonstrated a significant variation in microbiota composition at 10–14 days following single-dose albendazole treatment. Individuals cured of hookworm infection after treatment showed a significant reduction in microbiota composition when compared to their pre-treatment state (ANOSIM; p = 0.02), whilst individuals who failed to clear the infection showed no significant change in microbiota composition (ANOSIM; p = 0.35). Both uninfected individuals and individuals who were successfully treated were similar in terms of microbial composition and structure. We also found that the abundance of Clostridia spp. was increased in positive individuals before treatment as well as in those who were not cured. Predictive functional profiling revealed the enrichment of two pyruvate ferredoxin oxidoreductase subunit pathways in individuals who remained infected after treatment (p < 0.05), alluding to an upturn of strictly anaerobic commensal bacteria such as Clostridia spp. This study suggests a relationship between human gut microbiome dysbiosis and albendazole therapy outcomes of hookworm infection. Future studies will further characterize specific biomarkers identified within this study to establish their potential for assessment of pharmacological responses to anthelminthic therapies, as well as explore the possibility of using probiotic supplementation as an adjunct treatment to increase albendazole effectiveness against hookworm.

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