Abstract

Malaria co-infection with HIV, tuberculosis (TB), and helminths presents a complex clinical and public health 
challenge, particularly in sub-Saharan Africa where all four infections are highly endemic. This narrative review 
synthesises existing evidence on the epidemiology, clinical outcomes, prevention, and research priorities 
concerning malaria co-infection with these major pathogens. Findings reveal that HIV infection compromises host 
immunity, exacerbating malaria severity and recurrence, while malaria infection accelerates HIV replication and 
progression. Co-infection with helminths produces contrasting effects, sometimes reducing malaria severity but 
increasing chronic susceptibility. Evidence on malaria–TB interactions remains limited, though coinfected 
individuals often present with altered clinical manifestations and poorer prognoses. The overlapping epidemiology 
and shared social determinants poverty, poor sanitation, and weak health systems compound disease burden and 
hinder effective management. Integrated prevention and control approaches, including combined vector control, 
harmonised diagnostic and treatment protocols, and strengthened health education, have shown promising results 
but remain under-implemented. Major challenges include poor adherence, drug resistance, and fragmented service 
delivery. Research gaps persist in understanding co-infection pathogenesis, immune mechanisms, and 
pharmacological interactions. Advanced methodologies such as geostatistical modelling, cohort studies, and multi
disease surveillance systems are needed to capture disease interactions at population and molecular levels. The 
review concludes that a unified One Health approach linking human, animal, and environmental health together 
with sustainable financing, innovation, and coordinated governance, is critical to mitigating the burden of malaria 
co-infection and improving global health outcomes.