Observations on two new species of MyxosomaThélohan, 1892 (myxozoa: Myxosomatidae) from freshwater teleost fishes

Haldar, D.P.; Mukherjee, M.; Kundu, Tanmay

doi:10.1016/s0003-9365(81)80016-4

Cited by 15 publications

(6 citation statements)

References 7 publications

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“…vanivillasae ( Seenappa and Manohar, 1980 ) from scales of Cirrhinus mrigala ; M . rohitae ( Haldar et al., 1981 ) from scales of L . rohita , Labeo calbasu , Labeo bata and Puntius sarana ; M .…”

Section: Discussionmentioning

confidence: 99%

Molecular identification of a new myxozoan, Myxobolus dermiscalis n. sp. (Myxosporea) infecting scales of Labeo rohita Hamilton in Harike Wetland, Punjab (India)

Kaur

Attri

Joshi³

2016

International Journal for Parasitology: Parasites and Wildlife

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In the present study, a new species Myxobolus dermiscalis n. sp. infecting scales of Labeo rohita, an Indian major carp from Harike Wetland in Punjab, India has been described on the basis of spore morphology and amplification of a part of 18S rDNA gene. The pseudocysts of M. dermiscalis n. sp. are milky white with irregular outline, 0.5–3.6 mm in diameter embedded within the dermal scale in the form of a cavity. The spores 5.84–7.98 × 3.98–5.98 μm in size, having two equal polar capsules 3.98–5.98 × 1.85–3.85 μm in size. The most differentiating feature from closely related species, Myxobolus saugati (Kaur and Singh, 2011) is the presence of two parietal folds at the posterior – lateral margins of the shell valves. The present species is regarded as host, organ and tissue specific in nature. The partial sequence of SSU gene of M. dermiscalis n. sp. clustered with other Myxobolus species infecting cyprinids available in the GenBank. Blast search revealed 98% homogeneity with Myxobolus sp (KM401439) infecting scales of L. rohita in Myanmar (unpubl. data). The present myxobolid parasite has been recorded to cause serious, highly symptomatic disease of the scales, causing their loosening from the skin of L. rohita. It rendered the host fish unsightly giving it cloudy appearance with white patches and mucoid body surface. Scale pseudocyst Index (SPI) has been provided to record the intensity of infection.

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Section: Discussionmentioning

confidence: 99%

Molecular identification of a new myxozoan, Myxobolus dermiscalis n. sp. (Myxosporea) infecting scales of Labeo rohita Hamilton in Harike Wetland, Punjab (India)

Kaur

Attri

Joshi³

2016

International Journal for Parasitology: Parasites and Wildlife

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“…Moreover, the tendency of myxosporidia to be host, organ and tissue specific (Molnar 1994) should also be considered when classifying new species. In Myxobolus, however, spore morphology seems to be a more reliable species character compared to host specificity and tissue tropism (Salim & Desser 2000 (Mitenev 1971, Wu et al 1975, Haldar et al 1981, Shulman 1984, Mitchell et al 1985, Dykova et al 1986, Lom & Dykova 1992). The fish host of Myxobolus balantiocheili is endemic to tropical habitats in Southeast Asia, while the other Myxobolus species, except of M. filamentosus, are reported from temperate or even subarctic regions.…”

Section: Most Species Ofmentioning

confidence: 99%

Neurological symptoms in tricolor sharkminnow Balantiocheilos melanopterus associated with Myxobolus balantiocheili n. sp. infecting the central nervous system

Levsen¹,

Alvik²,

Grotmol³

2004

Dis. Aquat. Org.

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A new species, Myxobolus balantiocheili, is described from the central nervous system of wild and cultured tricolor sharkminnow Balantiocheilos melanopterus from Thailand. The infection was associated with emaciation and severe neurological symptoms, including sudden uncoordinated darting, rolling and pitching. Whitish cysts of varying shape, measuring 70 to 500 µm, were located in the brain, spinal cord and in the meninx, and were sometimes accompanied by haemorrhages. In the brain, most cysts were located in the medulla oblongata and the mesencephalon. Cysts with a segmental distribution were observed in the meninx of the spinal cord. Single di-to hexasporic pansporoblasts, and free mature spores, were frequently seen in both the white and grey matter of the brain and spinal cord, mostly associated with blood vessels. Mature spores varied in shape from oval to ellipsoid, measuring 12.3 ± 0.59 (range 10.6 to 13.3) × 10.0 ± 0.47 (9.2 to 10.9) × 6.9 ± 0.20 (6.7 to 7.1) µm. Spore size and morphology, in addition to fish-host species and apparently narrow tissue tropism, clearly distinguishes this new Myxobolus. No marked inflammatory response or gliosis was associated with the lesions, but compression and degeneration of the nervous tissue surrounding large cysts was observed. We suggest that the high temperature of the fish hosts' tropical habitat may have increased the rate of development and the virulence of M. balantiocheili.

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“…Both spores found by us and spores of M. rewensis have a relatively large intercapsular appendix, but we were able to observe a characteristic bright nodule inside the appendix. Four other morphologically similar species ( Table 2 , M. shetti Seenappa and Manohar, 1981 and M. vanivilasae Seenappa and Manohar, 1980 from mrigal; M. dermatis Haldar et al, 1981 and M. rohitae Haldar et al, 1983 from rohu) have been described from labeonid fishes ( Seenappa and Manohar, 1980 , 1981 ; Haldar et al, 1981 , 1983 ). However, the plasmodia of the latter species develop either in the scales or in the gills.…”

Section: Resultsmentioning

confidence: 98%

The occurrence of known Myxobolus and Thelohanellus species (Myxozoa, Myxosporea) from Indian major carps with the description of Myxobolus bandyopadhyayi n. sp. in West Bengal

Székely

Ghosh

Borzák

et al. 2021

International Journal for Parasitology: Parasites and Wildlife

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Myxosporean infection of Indian major carps (rohu, Labeo rohita ; catla, Gibelion catla ; mrigal, Cirrhinus mrigala ) was examined from two fish farms and two fish markets in West Bengal, India. One Thelohanellus and four Myxobolus species were detected from the fins and scales of the investigated species. Comprehensive morphological and molecular biological studies revealed four already known species, Thelohanellus caudatus from the fins of rohu, Myxobolus dermiscalis from the scales of rohu, Myxobolus chakravartyi from the fins of catla, and Myxobolus rewensis from the fins of mrigal. This study complemented the species description of M. chakravartyi and M. rewensis with the missing molecular data. Moreover, based on morphometrics and ssrDNA sequence data, a new species was documented from the scales of rohu, and named Myxobolus bandyopadhyayi n. sp.

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Observations on two new species of MyxosomaThélohan, 1892 (myxozoa: Myxosomatidae) from freshwater teleost fishes

Cited by 15 publications

References 7 publications

Molecular identification of a new myxozoan, Myxobolus dermiscalis n. sp. (Myxosporea) infecting scales of Labeo rohita Hamilton in Harike Wetland, Punjab (India)

Molecular identification of a new myxozoan, Myxobolus dermiscalis n. sp. (Myxosporea) infecting scales of Labeo rohita Hamilton in Harike Wetland, Punjab (India)

Neurological symptoms in tricolor sharkminnow Balantiocheilos melanopterus associated with Myxobolus balantiocheili n. sp. infecting the central nervous system

The occurrence of known Myxobolus and Thelohanellus species (Myxozoa, Myxosporea) from Indian major carps with the description of Myxobolus bandyopadhyayi n. sp. in West Bengal

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