Rare Tsetse Fly-Borne Disease Found in Safari Travelers Returning from Zambia and Zimbabwe, Highlighting a Diagnostic Blind Spot in the U.S.

LUSAKA – The U.S. Centers for Disease Control and Prevention (CDC) has sounded an alarm following the diagnosis of East African Trypanosomiasis, commonly known as sleeping sickness (HAT), in multiple safari travellers returning from Zambia and neighbouring Zimbabwe. This rare but deadly parasitic disease, transmitted by the bite of an infected tsetse fly, has highlighted a significant diagnostic challenge in countries where the illness is not endemic, potentially delaying life-saving treatment. While Zambian authorities and health organisations have made considerable strides in controlling vector-borne diseases, including tsetse fly populations, the recent cases involving international tourists serve as a stark reminder of the persistent threat. The CDC's travel notice specifically mentions the first U.S. case originating from the Zambezi Valley since 2019, indicating that despite reduced prevalence, the risk remains for visitors to certain safari destinations. For many American tourists, preparations for a Zambian safari typically revolve around malaria prevention and photographic equipment, often overlooking the less common but equally serious threat posed by tsetse flies. East African Sleeping Sickness, caused by the parasite *Trypanosoma brucei rhodesiense*, progresses rapidly and is invariably fatal if left untreated. The initial symptoms, which can be non-specific and flu-like, include fever, headaches, joint pain, and swollen lymph nodes, making early diagnosis challenging even in endemic areas. In non-endemic settings like the United States, medical professionals may not consider HAT, leading to misdiagnosis or delayed treatment. This diagnostic blind spot is exacerbated by the fact that the disease requires specialised laboratory tests not routinely available in many healthcare facilities. Zambia, with its rich biodiversity and world-renowned national parks such as South Luangwa and Lower Zambezi, attracts thousands of tourists annually. The country has