Trematode metacercariae from the cranial cavity of African catfish Clarias gariepinus (Burchell, 1822) from Lake Tana, Ethiopia

Zhokhov, A. E.; Morozova, D. A.; Tessema, A.

doi:10.1134/s1995082910020094

Cited by 10 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are several reports of the occurrence of diplostomid metacercariae among Diplostomum mashonense Beverly-Burton, 1963, Dolichorchis tregenna and Tylodelphys spp. in the cranial cavity of C. gariepinus in Africa (MASHEGO & SAAYMAN, 1989;MWITA & NKWENGULILA, 2004;MUSIBA & NKWENGULILA, 2006;CHIBWANA & NKWENGULILA, 2010;ZHOKHOV et al, 2010;CHIBWANA et al, 2013CHIBWANA et al, , 2015MOEMA et al, 2013). However, the cranial cavity of the fish from the present study was not analyzed during the necropsies.…”

Section: Discussionmentioning

confidence: 79%

“…The metacercariae of Diplostomidae have similar morphologies between the different genera, which makes it impossible to identify them at the generic level. However, several authors classify the metacercariae at a generic level (MWITA & NKWENGULILA, 2004;CHIBWANA & NKWENGULILA, 2010), and specific level (BARSON et al, 2008;ZHOKHOV et al, 2010). Few studies developed molecular analyses for the identification of the metacercariae specimens collected from C. gariepinus (MWITA & NKWENGULILA, 2010;CHIBWANA et al, 2013CHIBWANA et al, , 2015MOEMA et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

First report of Diplostomidae metacercariae (Trematoda: Digenea) in African catfish Clarias gariepinus (Siluriformes: Clariidae) in Brazil

Ribeiro

Oliveira

Ederli

2019

Rev. Bras. Parasitol. Vet.

View full text Add to dashboard Cite

Clarias gariepinus is a fish from North of South Africa and was later introduced in several countries, including Brazil. The present study aimed to describe the first report of Diplostomidae metacercariae in C. gariepinus in Brazil. For this, 30 C. gariepinus were captured in a lake in the city of Campos dos Goytacazes, RJ, Brazil. Fishes were euthanized using freezing and necropsied for collection of parasites. The organs were dissected and analyzed for the presence of parasites that were processed for light and scanning electron microscopy. Trematodes were stained with Semichon’s Carmine and Gomori’s Trichrome, observed and schematized under a light microscope with image analysis software. A total of 190 trematodes were collected from the gills, suprabranchial organs, heart, stomach, intestinal mesentery, liver and body cavity of the fish. The parasites had a foliaceous body divided by a discrete constriction, without genital primordia, and a holdfast organ present at the posterior region, typical of metacercariae of the family Diplostomidae. It was classified as the 'Diplostomulum' morphotype, based on the morphology of the reserve bladder structure. This is the first report of the metacercariae of Diplostomidae parasitizing C. gariepinus in the Americas. This fish acts as an intermediate or paratenic host of this digenean in Brazil.

show abstract

Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 99%

First report of Diplostomidae metacercariae (Trematoda: Digenea) in African catfish Clarias gariepinus (Siluriformes: Clariidae) in Brazil

Ribeiro

Oliveira

Ederli

2019

Rev. Bras. Parasitol. Vet.

View full text Add to dashboard Cite

show abstract

“…For instance, when the genus Clarias was reviewed by [39], African Diplostomum species with similar features may follow a similar fate. This idea was supported by Zhokhov et al [40] and Zhokhov [38] of Congo (DRC) [36] and T.…”

Section: Taxonomy Of Diplostomum (Sensu Dubois 1970) Species In Africamentioning

confidence: 79%

“…For instance Tylodelphylus (Diplostomulum) victorianus was described by Vercammen-Grandjean[43] from the pericardial cavity of Xenopus laevis victorianus in Nyakabere River in DRC. T. grandis was described from C. gariepinus by Zhokov et al[40] from Lake Tana in Ethiopia. Four other Tylodelphys species, namely, T. claviformis (from Barbus, Labeobarbus, Garra), T. mutica (from Barbus), T. fusiliformis (from Oreochromis niloticus) and T. clariae (from C. gariepinus) were also described by Zhokov[44] from Lake Tana in Ethiopia.…”

mentioning

confidence: 99%

African Diplostomum (sensu Dubois 1961): Minireview on taxonomy and biology

Chibwana¹

2018

Int J Aquac Fish Sci

View full text Add to dashboard Cite

Freshwater fi sheries has a signifi cant contribution to development as an important source of human proteins as well as in sport fi shing and aquarium. Despite their importance, both wild and aquaculture fi sh suffer from a problem of parasitism, notably Diplostomum species, causing fi sh mortalities particularly in fi ngerlings. Although a considerable effort in understanding Diplostomum species taxonomy, biology and control of fi sh parasites has been well developed in the northern hemisphere, the knowledge of these aspects in Africa is not clearly known. Therefore the present work reviews the aspects of biology and taxonomy of African Diplostomum. The traditional approach to uncover these aspects would be to complete the life cycles in the laboratory, which would lead to morphological characterisation of all life cycle stages. However, establishing and maintaining life cycles of Diplostomum species is diffi cult, laborious and expensive. Although, molecular methods have been proven to provide an alternative solution, are not common in Africa due to lack of equipment and expertise. However, improvement of some weaknesses for some studies like providing pictures or diagrams of the Diplostomum species found is recommended. In addition, for laboratories that have the capacity to do molecular analysis, the use of a familiar molecular marker like a barcode region could be a prospective development in future.

show abstract

“…Metacercaria have been reported from the brian ventricles (Mueller 1972); the interlobular infoldings, ventricular cavities, and external meninges (Siegmund et al 1997); the cerebellum, medulla oblongata, and optic lobes (Barber and Crompton 1997;Dezfuli et al 2007); the cranial fluid surrounding the brain (Johnston and Halton 1981); the neural tissue within and on the surface of 216 GRIFFIN ET AL. the brain (Heckman 1992); tissues of the optic tecta and valvula cerebelli (Sandland and Goater 2001); and the adipose tissue surrounding the brain (Zhokhov et al 2010). However, no reports list encystment in the neurocranial bone and cartilage, or gill arch base, as reported previously for D. spathans (Griffin et al 2012) and observed here.…”

Section: Discussionmentioning

confidence: 99%

Chronic Pathology and Longevity of Drepanocephalus spathans Infections in Juvenile Channel Catfish

et al. 2014

View full text Add to dashboard Cite

Drepanocephalus spathans (Digenea: Echinostomatidae) is a common parasite of the double-crested cormorant Phalacrocorax auritus. The cercariae of D. spathans have been shown infective to juvenile Channel Catfish Ictalurus punctatus. The developing metacercariae concentrate in the cranial regions, often occluding blood vessels at the base of the branchial arch, occasionally resulting in death. The purpose of this study was to determine how long metacercariae of D. spathans persist in experimentally challenged Channel Catfish. Two separate infectivity trials were conducted. In both trials, metacercariae persisted at least 49 d postinfection, although prevalence and intensity of infection decreased over time. In the first trial, juvenile catfish (1-3 g) were exposed over three consecutive days to 100, 100, and 80 cercariae/fish/d, respectively. Fish were sampled 7 d after the final exposure, and metacercariae were observed in 83.3% (five of six) of challenged fish. At 21 d postexposure, metacercariae were present in only 50% of exposed fish (three of six). No metacercaria were observed in fish sampled at 35 d, however, metacercariae were present in one of six (16.7%) fish sampled 49 and 70 d postexposure, respectively. A second challenge consisted of a 24-h pooled exposure of 500 cercariae per fish. Again, metacercariae were present in most (six of seven; 85.7%) fish at 7 d postexposure. At 21 d postexposure, metacercariae were only evident in one of seven (14.3%) sampled fish. No metacercariae were present in any fish at 35 d postchallenge, yet one of seven (14.3%) fish was positive at 49 d postchallenge. The second study was terminated at 63 d postchallenge, as all fish sampled (n = 14) were negative for metacercariae. These data suggest that cercariae of D. spathans are infective to juvenile Channel Catfish, although the infection appears short lived as metacercariae rarely persisted longer than 2 months.

show abstract

Trematode metacercariae from the cranial cavity of African catfish Clarias gariepinus (Burchell, 1822) from Lake Tana, Ethiopia

Cited by 10 publications

References 3 publications

First report of Diplostomidae metacercariae (Trematoda: Digenea) in African catfish Clarias gariepinus (Siluriformes: Clariidae) in Brazil

First report of Diplostomidae metacercariae (Trematoda: Digenea) in African catfish Clarias gariepinus (Siluriformes: Clariidae) in Brazil

African Diplostomum (sensu Dubois 1961): Minireview on taxonomy and biology

Chronic Pathology and Longevity of Drepanocephalus spathans Infections in Juvenile Channel Catfish

Contact Info

Product

Resources

About