Influence du Nombre de Repas Infectieux sur la Competence Vectorielle des Mouches Tenerales de Glossina morsitans morsitans (Mall) Infectées par Trypanosoma (Nannomonas) congolense IL 1180

Kazadi, J. M.; Kageruka, P; Losson, Bertrand; Bens, A. Nde; Mohama, L.

doi:10.1017/s1742758400018622

Cited by 5 publications

(5 citation statements)

References 14 publications

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“…The predominance of females among infected flies is probably due to the greater number of meals taken compared to male and to their longer life 23 . Trypanosoma sp was specifically detected in the midgut and secondarily (or not) in salivary glands, as reported by others 26,27 . The infection rate in the present study, although determined after microscopic examination, is higher than the rate found by PCR, a highly sensitive method, in a neighboring country, Equatorial Guinea, precisely at Campo Rio (3.2%), suggesting the detection of a likely higher prevalence of infected flies if molecular tools were used in the present survey 27 .…”

supporting

confidence: 81%

Inventory of potential vectors of trypanosoma and infection rate of the Tsetse fly in the National Park of Ivindo, Gabon

Mbang¹,

Mavoungou²,

Mawili-Mboumba³

et al. 2015

Afr H. Sci.

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Background: Trypanosoma's vectors distribution is poorly investigated in Gabon, where Trypanosomiasis historical foci exist. Thus, an active detection of Trypanosoma sp transmission needs to be assessed. Objectives: The present study aims to identify potential vectors of Trypanosoma sp and to evaluate the infection rate of the Tsetse fly in an area of Gabon. Methods: An entomological survey was conducted in the National Park of Ivindo in May 2012 using Vavoua traps. All captured insects were identified. Tsetse were dissected and organs were microscopically observed to detect the presence of Trypanosoma sp. Results: 247 biting flies known as vectors of Trypanosomiasis were caught including 189 tsetse flies, 32 Tabanid and 26 Stomoxys. Tsetse flies had the highest bulk densities per trap per day (ADT = 3 tsetse / trap / day), while the lowest density was found among Stomoxys (ADT= 0.41 Stomoxys / trap / day). The infection rate of flies was 6.3%. Infectious organs were midguts and to a lesser extent salivary glands and proboscis. Conclusion: The presence of Tsetse infected by Trypanosoma highlights an existing risk of trypanosomiasis infection in the National Park of Ivindo.

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supporting

confidence: 81%

Inventory of potential vectors of trypanosoma and infection rate of the Tsetse fly in the National Park of Ivindo, Gabon

Mbang¹,

Mavoungou²,

Mawili-Mboumba³

et al. 2015

Afr H. Sci.

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“…Les femelles sont ici aussi plus infectées que les mâles, probablement parce qu'elles prennent un plus grand nombre de repas à intervalles rapprochés que les mâles, et parce que leur durée de vie est supérieure. Elles ont plus d'occasions de s'infecter et donc de transmettre un plus grand nombre de fois le parasite (Kazadi et al, 2000). La présence majoritaire de T. vivax, suivi par T. congolense Forêt confirme aussi les résultats trouvés à Bonon.…”

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Chorologie et infection par les trypanosomes deGlossina palpalis palpalisdans la forêt du banco et ses reliques, abidjan (Côte d’ivoire)

Allou

Acapovi-Yao

Kaba³

et al. 2009

Parasite

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Summary : ECO-DISTRIBUTION AND TRYPANOSOMA INFECTION OF GLOSSINA PALPALIS PALPALIS IN THE BANCO FOREST OF AND ITS RELICS, ABIDJAN (CÔTE D'IVOIRE)In order to implement an anti-vector programme in the suburb of Abidjan (Côte d'Ivoire), investigations were conducted to assess the tsetse fly densities as well as infection with trypanosomes. Catches were carried out during the rainy season and dry season with Vavoua traps laid during four consecutive days in different sites (Banco forest, Abidjan zoological park, area of the University of Abobo-Adjamé). One species of tsetse fly (Glossina palpalis palpalis) and two species of trypanosomes (Trypanosoma congolense, T. vivax) have been revealed. The apparent density per trap per day (DAP) is very high in the zoological park, 54.8 tsetse fly/trap/day during the dry season and 28.1 during the rainy season. At the University of Abobo-Adjamé, the DAP is respectively 13.5 and 8.1 tsetse fly/trap/day during the rainy season, and in the dry season it is only 0.9 and 0.8 in the Banco Forest. The physiological age on all sites is as follows: 57.5 % of old parous, 39 % of young parous and 3.6 % of nulliparous in the rainy season. These proportions vary to 51.9 % of young parous, 47.1 % of old parous and 1 % of nulliparous in the dry season. The overall infection rate is estimated at 20.7 % in the rainy season and 20 % in the dry season. Statistical analysis have showed a significant difference in the distribution of infection rates. Résumé

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“…This can be explained by the fact that females, in order to ensure the maturation of larvae, take a greater number of blood meals at shorter intervals. This biological characteristic provides them with more opportunities to become infected and also to transmit the parasite multiple times to their hosts [ 33 ]. These observations support the existence of a preferential cycle between bushbuck – tsetse flies – bushbuck, with occasional involvement of other hosts such as military working dogs.…”

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confidence: 99%

Tsetse fly ecology and risk of transmission of African trypanosomes related to a protected forest area at a military base in the city of Abidjan, Côte d’Ivoire

Konan,

Berté,

et al. 2023

Parasite

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African trypanosomoses, whose pathogens are transmitted by tsetse flies, are a threat to animal and human health. Tsetse flies observed at the military base of the French Forces in Côte d’Ivoire (FFCI base) were probably involved in the infection and death of military working dogs. Entomological and parasitological surveys were carried out during the rainy and dry seasons using “Vavoua” traps to identify tsetse fly species, their distribution, favorable biotopes and food sources, as well as the trypanosomes they harbor. A total of 1185 Glossina palpalis palpalis tsetse flies were caught, corresponding to a high average apparent density of 2.26 tsetse/trap/day. The results showed a heterogeneous distribution of tsetse at the FFCI base, linked to more or less favorable biotopes. No significant variation in tsetse densities was observed according to the season. The overall trypanosomes infection rate according to microscopic observation was 13.5%. Polymerase chain reaction (PCR) analyses confirmed the presence of Trypanosoma vivax and T. congolense forest type, responsible for African animal trypanosomosis. Our findings suggest that there is a risk of introduction and transmission of T. brucei gambiense, responsible for human African trypanosomiasis, on the study site. This risk of transmission of African trypanosomes concerns not only the FFCI base, but also inhabited peripheral areas. Our study confirmed the need for vector control adapted to the eco-epidemiological context of the FFCI base.

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Influence du Nombre de Repas Infectieux sur la Competence Vectorielle des Mouches Tenerales de Glossina morsitans morsitans (Mall) Infectées par Trypanosoma (Nannomonas) congolense IL 1180

Cited by 5 publications

References 14 publications

Inventory of potential vectors of trypanosoma and infection rate of the Tsetse fly in the National Park of Ivindo, Gabon

Inventory of potential vectors of trypanosoma and infection rate of the Tsetse fly in the National Park of Ivindo, Gabon

Chorologie et infection par les trypanosomes deGlossina palpalis palpalisdans la forêt du banco et ses reliques, abidjan (Côte d’ivoire)

Tsetse fly ecology and risk of transmission of African trypanosomes related to a protected forest area at a military base in the city of Abidjan, Côte d’Ivoire

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