Variation spatiale du risque pour les porcs de contracter la trypanosomose dans la zone périurbaine de Kinshasa

Abstract

KINSHASAIn an effort to understand better the transmission risk as well for the animal african trypanosomosis (AAT) as for the human trypanosomosis (HAT) in the peri-urban zone of Kinshasa, a serologic study was carried out in local pig farms from 2003 to 2005. An indirect ELISA was used to detect the presence of trypanosome antibodies in 1,240 pigs originating from 404 farms. Seropositivity was recorded in 155 farms (38 %), but varied considerably according to the district. In 6 % of the farms TAA could be confirmed by parasitological examination. Trapping sites (n = 367) established in the neighbourhood of pig farms made it possible to capture 1,935 tsetse flies (Glossina fuscipes quanzensis). Among 562 dissected flies 23 were found to harbour trypanosomes resulting in an infection rate of 4.1 %. In the majority of the districts the transmission risk for animal trypanosomosis anticipated from the apparent vector densities was corroborated by the serology. Zones with strong indications of local AAT transmission were identified in several quarters of three peri-urban districts of Kinshasa: Mount-Ngafula, Ngaliema and N'Sele. An intensification of tsetse control activities in those sites of increased transmission risk is essential. Résumé

Review of the Situation of Human African Trypanosomiasis in the Republic of Congo From the 1950s to 2020

“…In 2015 the national control program for sleeping sleekness reported eight cases through passive detection ( PNLTHA 2015 ). Brazzaville is also vulnerable due to its close proximity (less than 3 km) with the city of Kinshasa where urban cases of HAT are regularly reported ( Ebeja et al 2003 , Sumbu et al 2009 ).…”

How can tsetse population genetics contribute to African trypanosomiasis control?

“…[10]), where Review E-mail addresses: solano@ird.bf, ssolano@free.fr 1471-4922/$ -see front matter ß 2010 Elsevier Ltd. All rights reserved. doi:10.1016/j.pt.2010.02.006 Available online 2 March 2010 they can cause severe outbreaks, such as the recent one in Kinshasa [11].…”

“…Palpalis group tsetse have been reported to be much less vulnerable to high human densities than are flies of the morsitans group [19,20]. The phylogenetically close species G. fuscipes is currently responsible for the most extensive sleeping sickness epidemics in Kinshasa, Democratic Republic of Congo [11]. Could it be that the local population structuring of palpalis group flies that maintains its high genetic variability explain their ability to adapt to such different situations?…”