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bioRxiv · 10.64898/2026.04.30.720083

Pathogenesis of Alcohol-Exacerbated Malaria in Plasmodium berghei-Infected Mice

Bertrand Yuwong, W.·Nadege Emegam, K.·Shinyuy Lahngong, M.·Tiku Nda, H.·Tita Jugha, V.·Ambe Ngwa, F.·Sotoing Taiwe, G.
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Abstract

IntroductionMalaria is still a pressing global health challenge, especially in sub-Saharan Africa, where behavioral factors such as alcohol consumption may exacerbate its impact. The present study is aimed at investigating the pathogenesis of alcohol-exacerbated malaria in Plasmodium berghei-infected an animal model (mice). MethodsMale mice were separated into four treatment groups: control, alcohol control, P. berghei and P. berghei plus acute alcohol treatment groups. Animals were infected with malaria through intraperitoneal injection of P. berghei and an acute dose of ethanol (20% v/v) was introduced 48 hours post-infection. Parasitaemia was monitored using the Giemsa-stained thin blood smears. Haematological parameters were assessed using automated blood analyser. Liver function was evaluated by measuring serum levels of AST and ALT and cytokine profiles (TNF-, INF-{gamma}, IL-6, IL-1{beta}) were quantified using ELISA kits. ResultsResults show that acute alcohol intake led to a significant increase in parasitaemia in the P. berghei group (p<0.01). Haematological analysis revealed a significant (p<0.001) reduction in RBC count, haemoglobin levels, haematocrit percentage, platelet count and others in the P. berghei plus acute alcohol group. Liver enzyme assays revealed an elevated AST and ALT levels (p<0.001) in the P. berghei group. Cytokine analysis revealed a significant (p<0.01) upregulation of pro-inflammatory cytokines (TNF- INF-{gamma}, IL-1{beta} and IL-6), due to acute alcohol. These results suggest that alcohol exacerbates malaria pathogenesis by increasing parasitaemia, promoting immune dysregulation and liver injury, mediated by a shift toward a pro-inflammatory cytokine profile.

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Bertrand Yuwong, W., Nadege Emegam, K., Shinyuy Lahngong, M., Tiku Nda, H., Tita Jugha, V., Ambe Ngwa, F., Sotoing Taiwe, G.. 2026-05-05. Pathogenesis of Alcohol-Exacerbated Malaria in Plasmodium berghei-Infected Mice. https://doi.org/10.64898/2026.04.30.720083

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