Myxosporidia infecting some Nile fishes in Egypt

Ghaffar, Fathy Abdel; El-Shahawi, Gamal; Naas, Sedigh

doi:10.1007/bf00931624

Cited by 23 publications

(9 citation statements)

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“…In contrast, the prevalence of M. zillii and M. dossoui was close to that which was observed in the gills of C. lazera (Ghaffar et al 1995). The other parasite species studied were found only sporadically (2 to 4%), as are parasite species usually observed on freshwater fishes (Ghaffar et al 1995, Molnár & Székely 1999. Myxosporean parasites on gills are known to induce mortality such as Henneguya sp.…”

Section: Discussion Prevalence Datasupporting

confidence: 59%

“…in S. m. melanotheron was higher than that found in the gills of Labeo niloticus (between 12 and 20% for different Myxobolus sp.) or Clarias lazera (14% for Henneguya branchialis) (Ghaffar et al 1995) but lower than that found in the gills of Abramis brama (Molnár & Székely 1999). In contrast, the prevalence of M. zillii and M. dossoui was close to that which was observed in the gills of C. lazera (Ghaffar et al 1995).…”

Section: Discussion Prevalence Datamentioning

confidence: 65%

“…or Clarias lazera (14% for Henneguya branchialis) (Ghaffar et al 1995) but lower than that found in the gills of Abramis brama (Molnár & Székely 1999). In contrast, the prevalence of M. zillii and M. dossoui was close to that which was observed in the gills of C. lazera (Ghaffar et al 1995). The other parasite species studied were found only sporadically (2 to 4%), as are parasite species usually observed on freshwater fishes (Ghaffar et al 1995, Molnár & Székely 1999.…”

Section: Discussion Prevalence Datamentioning

confidence: 65%

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Occurrence of myxosporean parasites in the gills of two tilapia species from Lake Nokoué (Bénin, West Africa): effect of host size and sex, and seasonal patterns of infection

Gbankoto

Pampoulie

Marques³

et al. 2001

Dis. Aquat. Org.

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The gill myxosporean parasites of 2 euryhaline tilapias from Lake Nokoué, Sarotherodon melanotheron melanotheron (Rüppel, 1853) and Tilapia zillii (Gervais, 1852), were investigated from October 1987 to October 1989. A total of 391 S. m. melanotheron and 222 T. zillii were examined. Both of the fish species studied were infected by 3 host-specific myxosporean parasites for which prevalence greatly varied during our investigations. The 2 most common ones were Myxobolus sp. and M. zillii, which were located in the branchial filament. No significant fish sex effect was found for these 6 different myxosporean parasites. As seasonal pattern was clearly demonstrated for M. zillii while a host size effect was found for M. dossoui. However, further investigations of these myxosporean infections are necessary to determine the real effect of these parasites on their host, as host fecundity and survival was not assessed.Resale or republication not permitted without written consent of the publisher

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Section: Discussion Prevalence Datasupporting

confidence: 59%

Section: Discussion Prevalence Datamentioning

confidence: 65%

Section: Discussion Prevalence Datamentioning

confidence: 65%

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Occurrence of myxosporean parasites in the gills of two tilapia species from Lake Nokoué (Bénin, West Africa): effect of host size and sex, and seasonal patterns of infection

Gbankoto

Pampoulie

Marques³

et al. 2001

Dis. Aquat. Org.

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“…type 4 (Fomena et al 1985) and Myxobolus sp. type 2 (Abdel Ghaar et al 1995b). Despite the close resemblance of Myxobolus cycloides to the present spores, it is smaller and has fewer polar ®lament turns and has 5±6 notches in the inner wall.…”

Section: Myxobolus Caudatus Sp Nmentioning

confidence: 62%

Some species of the genus Myxobolus (Myxozoa: Myxosporea) infecting freshwater fish of the River Nile, Egypt, and the impact on their hosts

et al. 2002

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Six Myxobolus species are described from Nile ®sh, ®ve of which are new and one is redescribed: M. naari Abdel Ghaar et al., 1998 was recovered from the gills of Labeo niloticus and the mouth of Barbus bynni; M. caudatus sp. n. was observed in the tail ®n of B. bynni; M. fahmii sp. n. occurred in the gills of B. bynni; M. imami sp. n. was found in the kidney of L. niloticus; M. intestinalis sp. n. was recorded from the intestine of B. bynni; and M. perforata sp. n. was found in the internal surface of the operculum of Hydrocynus forskalii. The histological eects of some of the Myxobolus infections present are described. ResultsAll the examined ®sh were found to harbor myxosporean infection except Tetradon fahaka and Mormyrus kannume. Myxobolus naari Abdel Ghaar et al., 1998 See Figs. 1a, 4a. Host B. bynni and L. niloticus. Site of infectionMouth of B. bynni and gills of L. niloticus.

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“…Kudoa ciliatae infects the smooth muscle layer of the intestine of sand whiting Sillago ciliata (Lom et al 1992), M. colossomatis has been described inside serous membranes around the intestine of the tambaqui Colossoma macropomum (Molnár & Békési 1993), Myxidium leei in the intestinal wall of cultured sea bream Sparus aurata (Diamant et al 1994), and Henneguya sarotherodoni in the intestine wall of the tilapia Sarotherodon galilaeus (Fall et al 2000). Prevalence data are scarce, but Ghaffar et al (1995) found that 14% (n = 80) of the African catfish Clarias garriepinus were infected by cysts of H. branchialis on the outer wall of the small intestine, and Landsberg (1983) reported cysts of Myxidium giardi in the intestine of 29 of 30 European eels Anguilla anguilla.…”

Section: Parasite Infectionmentioning

confidence: 99%

nfection patterns ofMyxobolus heterosporain two tilapia species (Teleostei: Cichlidae) and its potential effects

Gbankoto

Pampoulie²,

Marques³

et al. 2003

Dis. Aquat. Org.

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A Myxobolus heterospora (Baker, 1963) infection was found in 2 euryhaline tilapia species, Sarotherodon melanotheron melanotheron (Rüppel, 1853) and Tilapia zillii (Gervais, 1852), from a brackish water lake, Lake Nokoué (Benin, West Africa). The histology and ultrastructure of different levels of infection in intestinal connective tissues and wall tissues is described. A total of 391 S. melanotheron melanotheron and 222 T. zillii were examined from October 1987 to October 1989. M. heterospora was found throughout the study period, with a total prevalence of 42.19 and 26.57% for S. melanotheron melanotheron and T. zillii respectively. There was a statistically significant difference in occurrence as a function of season in S. melanotheron melanotheron but not in T. zillii, and there was a significant difference for size and sex in the former and for sex in the latter. M. heterospora induces total destruction of the intestine structure and probably leads to osmoregulatory disturbance. Further investigations of this myxosporean infection are necessary to determine its real effect on the host, since host survival and osmoregulatory rate have not yet been assessed.

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Myxosporidia infecting some Nile fishes in Egypt

Cited by 23 publications

References 1 publication

Occurrence of myxosporean parasites in the gills of two tilapia species from Lake Nokoué (Bénin, West Africa): effect of host size and sex, and seasonal patterns of infection

Occurrence of myxosporean parasites in the gills of two tilapia species from Lake Nokoué (Bénin, West Africa): effect of host size and sex, and seasonal patterns of infection

Some species of the genus Myxobolus (Myxozoa: Myxosporea) infecting freshwater fish of the River Nile, Egypt, and the impact on their hosts

nfection patterns ofMyxobolus heterosporain two tilapia species (Teleostei: Cichlidae) and its potential effects

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