Abstract
Parasitic diseases of fish are very rarely highlighted in comparison with certain parasitic diseases transmitted to humans through animals or plants such as echinococcosis, bilharziasis or fasciolosis. The aim of this study is to provide knowledge on endoparasites of the human digestive tract that also infest the digestive tracts of two species of Cichlidae fish: Oreochromis niloticus Linnaeus, 1758 and Tilapia tholloni Sauvage, 1884 caught in the Congo River (Malebo Pool). Microscopic observations were made on 42 specimens of O. niloticus fish and 42 of T. tholloni. The results obtained showed that the digestive tracts of fish Oreochromis niloticus host 8 species of parasites grouped in 6 genera, 6 families, 4 classes and 2 branches. The species belonging to the phylum Nemathelminths branch were more abundant (58.8%) than Plathelminths (41.2%). Species Trichurus trichiura (23.5%), Ascaris lumbricoides (20.6%), Strongyloides stercoralis (14.7%), Schistosoma haematobium and Schistosoma intercarlantum (11.8%) were the most frequently observed. On the other hand, microscopic analyses of the digestive tract of Tilapia tholloni revealed the presence of five species of parasites belonging to 3 branches, 4 classes, 4 families and 4 genera. Nemathelminthes (58.3%) and Plathelminthes (25%) are the most represented phylum than Amoebians (16.7%). Enterobius vermicularis (33.3%), Trichocephalus trichuris (25%), Schistosoma haematobium (20.8%) and Entemoeba hystolica (16.7%) were frequently observed. These results confirm the presence of endoparasites in congolese freshwater fish. This information is important in setting up a strategy to protect fish and consumers against these pathogens.
Highlights
Aquatic ecosystems provide many goods and services that are often not fully appreciated (Brummett et al, 2008)
The aim of this study is to provide knowledge on endoparasites of the human digestive tract that infest the digestive tracts of two species of Cichlidae fish: Oreochromis niloticus Linnaeus, 1758 and Tilapia tholloni Sauvage, 1884 caught in the Congo River (Malebo Pool)
This study aims to identify human endoparasites in the digestive tracts of two species of freshwater fishes of the family Cichlidae (Oreochromis niloticus Linnaeus, 1758 and Tilapia tholloni Sauvage, 1884) caught in the Malebo Pool (Congo River) in the Democratic Republic of Congo
Summary
Aquatic ecosystems provide many goods and services that are often not fully appreciated (Brummett et al, 2008). Water pollution from a variety of natural, domestic, agricultural and industrial causes is the source of many diseases related to infectious or toxic factors (Delolme et al, 1992). Fish from these polluted environments are infested, their consumption could transmit the parasitosis to humans, from which fecal parasites can probably be observed from humans to fish and from fish to humans whose reservoir is the water. According to Thillement (2015), more than 100 pathogens are likely to parasitize humans, but only a small number represent a public health problem. Pathogens are transmitted from one fish to another through the skin and gills. Fish are sensitive to stress, can be disturbed by poor water quality, poor diet, rough handling or a disturbed as.ideasspread.org
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