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Parasites and pathological conditions in the edible oyster, Crassostrea madrasensis (Preston), from the east and west coasts of India

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Title Parasites and pathological conditions in the edible oyster,
Crassostrea madrasensis (Preston), from the east and west coasts
of India
Not Available
 
Creator Suja,G
Kripa,V
Mohamed,K S
Lijo,J
Mini,K G
Sanil,N K
 
Subject Crassostrea madrasensis
Histopathology
Protozoan parasites
Pathological conditions
Host physiology
 
Description Not Available
A detailed pathological survey was carried out on
the commercially important edible oyster, Crassostrea
madrasensis (Preston), from two distinct coastal/brackish water
ecosystems of south India. Samples were collected twice a
year during wet and dry seasons from 2009 to 2012. Bacterial
colonies in the form of prokaryotic inclusions, protozoans
(Perkinsus beihaiensis, Nematopsis sp. and ciliates
Sphenophrya sp. and Stegotricha sp.), metazoans (trematodes,
turbellaria, cestodes and crustaceans) and shell parasites
(Polydora spp. and Cliona spp.) along with various pathological
conditions (digestive tubule atrophy, ceroid bodies,
haemocytic infiltration, tissue necrosis and neoplastic disorders)
were observed in C. madrasensis collected from two
sites. Intensity, spatial and seasonal variations in infection
prevalence and pathological effects on the host were studied.
The protozoan parasite, P. beihaiensis; shell parasite,
Polydora spp. and pathological condition, digestive gland atrophy
were most prevalent in occurrence. High-intensity infections
with P. beihaiensis, larval trematodes and Polydora
spp. were found to cause significant impact on host physiology.
All other parasites were observed with low mean prevalence
and intensity. Karapad in Tuticorin bay, the site reported
with marked pollution levels, exhibited higher number of parasitic
taxa and high mean prevalence and intensity for pathological
conditions.
Not Available
 
Date 2021-09-17T08:59:40Z
2021-09-17T08:59:40Z
2017
 
Type Article
 
Identifier Not Available
1432-1955
http://krishi.icar.gov.in/jspui/handle/123456789/63947
 
Language English
 
Relation Not Available
 
Publisher Not Available