Preliminary Study Of The Prevalence Of Helminths And Their Associated Pathological Lesions In Four Fish Species From River Tana

Gichohi, CM; Mbuthia, P.G.; Waruiru, RM; Ngatia, TA; Maingi, T; Weda, E.H.; Otieno, RO

doi:10.4314/bahpa.v56i1.32824

Cited by 2 publications

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“…Indeed, diplostomids are frequently found in tilapias from all aquatic systems (Florio et al , 2009). Infection levels were higher than previously reported in Kenya from farmed tilapia (Florio et al , 2009; Otachi, 2009; Gichohi, 2010; Migiro et al , 2012). As discussed by Otachi et al (2014), the factors influencing variation in infection levels among the fish species may include fish microhabitat and behaviour, and subsequent variation in exposure, rather than variation in susceptibility (Valtonen & Gibson, 1997; Karvonen et al , 2004).…”

Section: Discussioncontrasting

confidence: 52%

“…appears to be a true generalist (Poulin & Mouillot, 2005), as it occurred in similarly high intensities in four fish species in three families and two orders. Previous reports of diplostomid metacercariae in Kenya are from Nile tilapia Oreochromis niloticus and African catfish C. gariepinus (Florio et al , 2009; Otachi, 2009; Gichohi, 2010; Migiro et al , 2012). Indeed, diplostomids are frequently found in tilapias from all aquatic systems (Florio et al , 2009).…”

Section: Discussionmentioning

confidence: 99%

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Morphometric and molecular analyses of Tylodelphys sp. metacercariae (Digenea: Diplostomidae) from the vitreous humour of four fish species from Lake Naivasha, Kenya

et al. 2014

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Even in the relatively well-characterized faunas of the developed world, it is difficult to discriminate species of metacercariae in the Diplostomidae using morphology, infection site or host use. The taxonomy, diversity and ecology of diplostomids infecting freshwater fishes in the African continent are particularly poorly known, but recent morphometric and genetic studies have revealed four species of diplostomids in the eyes and brains of siluriform fishes. In the present study, diplostomid metacercariae were collected from the eyes of 288 fish comprising two species within the Cyprinidae (Cyprinus carpio, n = 145, and Barbus paludinosus, n = 67), two Cichlidae (Oreochromis leucostictus, n = 56, and Tilapia zillii, n = 18) and one Centrarchidae (Micropterus salmoides, n = 2) caught in Lake Naivasha, Kenya. Morphometric (14 characters and 8 indices in 111 specimens) and molecular (sequences from the barcode region of the cytochrome c oxidase 1 gene in 11 specimens) data were used to discriminate species. All fish species except B. paludinosus were infected with Tylodelphys metacercariae that were initially separated into two types differing mainly in body length. However, this morphological distinction received only intermediate support in quantitative morphological analysis and molecular data indicated that both morphotypes were conspecific. All the specimens therefore are inferred to belong to a single unidentified species of Tylodelphys, which is not conspecific with any other diplostomid for which comparable molecular data are available, including four diplostomid species known from siluriform fish in Nigeria and Tanzania.

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Section: Discussioncontrasting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

Morphometric and molecular analyses of Tylodelphys sp. metacercariae (Digenea: Diplostomidae) from the vitreous humour of four fish species from Lake Naivasha, Kenya

et al. 2014

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“…Fish were dissected and examined for metacercariae on the muscles and visceral organs. The gastrointestinal tract was then opened and examined internally for helminth parasites using the technique described by Gichohi et al, (2008). The Metacercariae of Clinostomum from fish were released manually from their cysts before were fixed for identification using the techniques described by Paperna and Schmidt (1980).…”

Section: Parasitological Proceduresmentioning

confidence: 99%

Study on Helminth Parasites in Tilapia nilotica from Lake Zeway, Ethiopia

2017

Int. J. Adv. Res. Biol. Sci

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A cross sectional study was conducted in Lake Zeway on helminth parasites in Tilapia nilotica to determine the infection rate of helminth parasites. Gillnets were set in the evenings and retrieved in the mornings and fish were randomly sampled in fish production and marketing industry that were brought from different angles of the lake. The mesentery and the gastrointestinal tract were carefully separated and examined. Out of 400 specimens, 277 were examined 277(69.25%) infected with Clinostomum species. Metacercariae were found in the mesentery, and gastrointestinal tract, the brachial cavity, between the pharyngeal teeth and ventral side of cranium, and muscle. Immature and adult cestodes of the genus Bothriocephalus were found in the lumen of intestines with the proportion of (43)10.75% and (6)1.5% respectively of the diagnosed samples of fish 49(12.25%). Comprehensive information on existing fish parasites in Ethiopia and their epidemiological aspects is scanty. However, to decrease the infestation rate and break the life cycle of the parasite, proper waste disposal system and sanitation measures must be implemented.

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Preliminary Study Of The Prevalence Of Helminths And Their Associated Pathological Lesions In Four Fish Species From River Tana

Cited by 2 publications

References 0 publications

Morphometric and molecular analyses of Tylodelphys sp. metacercariae (Digenea: Diplostomidae) from the vitreous humour of four fish species from Lake Naivasha, Kenya

Morphometric and molecular analyses of Tylodelphys sp. metacercariae (Digenea: Diplostomidae) from the vitreous humour of four fish species from Lake Naivasha, Kenya

Study on Helminth Parasites in Tilapia nilotica from Lake Zeway, Ethiopia

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