Lukaw, Y.S., Abdelrahman, M.M., Mohammed, Y.O.,   Ochi E.B., Suliman, Y.R., and  Elrayah, I.E.

Abstract:

Tsetse flies are veterinary and medical vectors of genus Trypanosoma, they are haemoparasites that causes Human African Trypanosomiasis (HAT) or sleeping sickness in humans and of Nagana in Cattle. Glossina f. fuscipes has been identified as the main vector of HAT in South Sudan. Hence, a one-year cross-sectional survey was conducted in four Payams of Kajo-keji County (KKC) to determine seasonal distribution and abundance of G.f. fuscipes. 56 biconical traps were deployed to monitor the dynamic of this fly. Flies were identified, segregated into sexes, counted and apparent density of flies/trap/day was determined. Total catches between the dry and wet seasons was analyzed using unpaired t-test. Flies mean apparent density was performed using ANOVA. Moreover, SPSS 16.00 statistical package compatible to microsoft windows was used. A total of 6,161 adult G.f. fuscipes were harvested in the dry and wet seasons. Out of which 3,606 flies (1,811 females and 1,795 males) and 2,555 flies (1,583 females and 972 males) were captured in the dry and wet seasons, respectively. The mean apparent density showed two peaks of 8.3 flies/ trap/ day in January and of 5.0 flies in December during the dry season. Such apparent densities varied significantly (F = 7.19, P = 0.0005) among the four Payams of the County. Fly catches in dry season were significantly higher than that of the wet season t(10) = 5.224, P = 0.0004. The dynamic distribution and abundance of tsetse flies in the study area are seasonal. This study is imperative for developing control strategy of tsetse flies in KKC South Sudan.

Key words: Tsetse flies, Glossina fuscipes fuscipes, seasonal dynamics, abundance, apparent density.

Download the PDF Seasonal distribution and abundance of Glossina fuscipes fuscipes (Diptera: Glossinidae) in Kajo-Keji County South Sudan