Nematopsis rosenbergii n. sp. (apicomplexa: Cephalina) from the brackishwater prawn, Macrobrachium rosenbergii (De Man)

Shanavas, K. Ramanandan; Prasadan, P. K.; Janardanan, K. P.

doi:10.1016/s0003-9365(89)80007-7

Cited by 7 publications

(5 citation statements)

References 5 publications

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“…As their vegetative stages are similar to those of confirmed species of Nematopsis but strikingly different from those of Porospora , Sprague & Couch (1971) shifted them to Nematopsis and called N. mizoulei and N. soyeri . The other named species of Nematopsis from shrimp were reported by Sprague (1954), Kruse (1966), Feigenbaum (1975), Shanavas et al . (1989) and Prema & Janardanan (1990).…”

Section: Resultsmentioning

confidence: 85%

Nematopsis marinus n. sp., a new septate gregarine from cultured penaeoid shrimp Litopenaeus vannamei (Boone), in Ecuador

Jiménez¹,

Barniol²,

Machuca³

2002

Aquaculture Research

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The septate gregarine Nematopsis marinus n. sp. (Apicomplexa: Cephaline) heavily infected the midgut of cultured Pacific white shrimp Litopenaeus vannamei (Boone) in Ecuador. It is morphologically similar to other species of the genera Nematopsis, but it can be distinguished from them, by having gamonts with a prominent hemispherical protomerite that contained numerous refractile granules and unusual strong gliding movement. There is evidence that shrimp acquired the infection in the ponds, as larval or postlarval stages do not showed infection. Juveniles and adult shrimp had a prevalence and intensity of infection ranging from 50% to 80% and 10 to > 5000 parasites respectively. When voided from the gut, the gregarine keep alive in seawater. This gregarine have been associated with the marine environment and there are no records of this species in low salinity waters or freshwater. Results suggest that N. marinus could have most of the life cycle of the species within the host L. vannamei.

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Section: Resultsmentioning

confidence: 85%

Nematopsis marinus n. sp., a new septate gregarine from cultured penaeoid shrimp Litopenaeus vannamei (Boone), in Ecuador

Jiménez¹,

Barniol²,

Machuca³

2002

Aquaculture Research

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“…The morphology and ultrastructural analyses on the parasite oocysts and phagocytes in the infected adductor muscle, gills and mantle of the C. rhizophorae showed that this parasite belonging to the genus Nematopsis had characteristics similar to those observed in hosts from different regions worldwide (ABDEL-BAKI et al, 2012;AZEVEDO & CACHOLA, 1992;AZEVEDO & MATOS, 1999;AZEVEDO & PADOVAN, 2004;BRANDÃO et al, 2013;KUA et al, 2013;PADOVAN et al, 2003;SHANAVAS et al, 1989;TUNTIWARANURUK et al, 2004).…”

Section: Discussionmentioning

confidence: 90%

“…that have been described, it is surprising that it was not possible to obtain any information from the oocyst stage (sporogony) that would allow comparative analysis on this taxonomic group. Molecular analyses were only performed on the cephaline stages of gregarines, which were described as species of the genus Nematopsis (BELAFASTOVA, 1996;PRASADAN & JANARDANAN, 1996;SHANAVAS et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

“…Considering that some undetermined species of Nematopsis occurring in several hosts belonging to different species (ABDEL-BAKI et al 2012;AZEVEDO & CACHOLA, 1992;BOEHS et al, 2010;BRANDÃO et al, 2013;BRITO et al, 2010;CANESTRI-TROTTI et al, 2000;COVA et al, 2015;KUA et al, 2013;PINTO & BOEHS, 2008;QUEIROGA et al, 2015;SABRY & MAGALHÃES, 2005;SUJA et al, 2016;TUNTIWARANURUK et al, 2004TUNTIWARANURUK et al, , 2015, it is acceptable to think that many of the species thus described may correspond to previously described species. On the other hand, several Nematopsis species have been described from the gregarine stage of the schizogonic phase (CHAMBOUVET et al, 2016;CHAKRABORTI & BANDYOPADHYAY, 2010;JIMÉNEZ et al, 2002;PRASADAN & JANARDANAN, 1996, 2001SHANAVAS et al, 1989). These descriptions have not included the corresponding stage of the oocysts (schizogonic phase).…”

Section: Introductionmentioning

confidence: 99%

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Ultrastructure of phagocytes and oocysts of Nematopsis sp. (Apicomplexa, Porosporidae) infecting Crassostrea rhizophorae in Northeastern Brazil

Silva

Soares

Casal

et al. 2019

Rev. Bras. Parasitol. Vet.

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This work describes the detailed ultrastructural morphology of the phagocyte imprisoning an oyster of Nematopsis (Apicomplexa) found in Crassostrea rhizophorae, in the city of Maceió (AL), Brazil. The highly infected hosts had half-open leaflets with weak, slow retraction of the adductor muscles. Variable number of ellipsoid oocytes, either isolated and or clustered, was found between myofibrils of the adductor muscle. Each oocyst was incarcerated in a parasitophorous vacuole of host uninucleated phagocyte. The oocysts were composed of a dense wall containing a uninucleate vermiform sporozoite. The wall of the fine oocysts was composed of homogeneous electron-lucent material formed by three layers of equal thickness, having a circular orifice-micropyle obstructed by the operculum. The oocysts presented ellipsoid morphology with their wall was surrounded by a complex network of numerous microfibrils. Important details of the taxonomic value were visualized such as the ultrastructural organization of the oocyst wall and the organization of the micropyle and operculum, beyond the microfibrils that protrude from the oocyst wall only observed by transmission electron microscopy (TEM) and that may aid in the identification of the species. However, in order to clarify the systematic position of the species reported of the genus Nematopsis, it is important to proceed with genetic analyses.

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“…The morphological characteristic of the gregarine found in this study is closely related to reports, presumably because it originates from the same region. Research done by Shanavas et al (1989) showed different characteristics and sizes of Nematopsis rosenbergii even though it was found in the same host as in the present study (Table 3).…”

Section: Discussionmentioning

confidence: 42%

New Report on The Occurrence of Gregarine Parasites in Wild Species of Macrobrachium rosenbergii from Setiu Lagoon, Terengganu, Malaysia

Zakariah

Daud

Abdullah

et al. 2022

JIPK

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Highlight ResearchThis is the first report of the occurrence of gregarine species in Peninsular Malaysia.The information of these findings will lead to the identification of species using genetic analysis.This information can help to solve the cultured problem of the Macrobrachium rosenbergii industry worldwide. AbstarctStudies on the parasite of prawn are likely to be important due to the commercial value of the prawn. Investigation study about gregarine parasites of M. rosenbergii in Malaysia is still lacking. Objective of this study is to determine the occurrence of gregarine parasites in shrimp, M. rosenbergii from Setiu Lagoon, Terengganu. The study was done specifically to observe the prevalence and the mean intensity of the parasites which include the morphological prevalence and parasitological study. Prevalence of the parasites in this study is 42.4% with 95% Cumulative Index (CI) 25.6% to 59.3% and value of Odd Ratio (OR) is 0.74 (CI = 0.29 to 1.88). Two structures of the gregarine which is gamont and syzygy found in this study are closely related to morphology characteristic of gregarine in the previous report.

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Nematopsis rosenbergii n. sp. (apicomplexa: Cephalina) from the brackishwater prawn, Macrobrachium rosenbergii (De Man)

Cited by 7 publications

References 5 publications

Nematopsis marinus n. sp., a new septate gregarine from cultured penaeoid shrimp Litopenaeus vannamei (Boone), in Ecuador

Nematopsis marinus n. sp., a new septate gregarine from cultured penaeoid shrimp Litopenaeus vannamei (Boone), in Ecuador

Ultrastructure of phagocytes and oocysts of Nematopsis sp. (Apicomplexa, Porosporidae) infecting Crassostrea rhizophorae in Northeastern Brazil

New Report on The Occurrence of Gregarine Parasites in Wild Species of Macrobrachium rosenbergii from Setiu Lagoon, Terengganu, Malaysia

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