Global health impact and distribution of infectious diseases, including neglected tropical diseases

Neglected tropical diseases

Neglected tropical diseases are a group of predominantly parasitic and some bacterial/viral infections causing substantial morbidity in low-resource tropical/subtropical settings, historically under-prioritised in global health funding and research relative to their disease burden
Collectively affect a very large global population, predominantly in low- and middle-income countries, with substantial chronic disability burden (blindness, limb deformity, cognitive impairment) even where mortality is comparatively low

Many neglected tropical diseases share features that contribute to their "neglected" status - chronic rather than acute presentation, affecting predominantly poor/rural populations with limited health system access and political voice, and historically limited commercial incentive for pharmaceutical investment given affected populations' limited purchasing power

Relevant to clinical practice in high-income settings primarily through returned traveller and migrant health screening - a relevant travel/residence history should prompt consideration of endemic neglected tropical diseases (e.g. Strongyloides, schistosomiasis, Chagas disease) even years after departure from an endemic region, given some of these organisms' capacity for long-term latency

Global control strategies emphasise mass drug administration programmes (for several helminth infections), vector control, and improved water/sanitation infrastructure, alongside individual case treatment when a specific diagnosis is made
Individual screening in migrants/returned travellers from endemic regions (particularly before immunosuppression, given reactivation/hyperinfection risks for some organisms) is a practical clinical application relevant even in high-income practice settings

Strongyloides (long-latency, hyperinfection risk with immunosuppression), schistosomiasis, Chagas disease, lymphatic filariasis, onchocerciasis - each with distinct geographic distribution relevant to travel/migration history-taking
A remote travel or residence history in an endemic region remains clinically relevant for neglected tropical disease screening even many years later, given some organisms' capacity for long-term latency (Strongyloides being the classic example) - travel history should not be dismissed as irrelevant simply because the exposure was in the distant past

4 more sections, plus exam facts

Premium unlocks every note across every specialty, and the full exam fact library behind it.