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International Journal of HIV and AIDS research
International Conference on
&
Sexually Transmitted Diseases, AIDS and Parasitic Infections
Parasitology, Infectious Diseases, STDs and STIs
September 21-22, 2017 San Antonio, TX, USA
Myxozoan parasites affecting aquaculture fish in Punjab (India)
Anu Katoch
Mata Gujri College, India
Myxozoans are one of the economically important groups of metazoan parasites as they infect fish harvested
for food. New myxosporean pathogens are continually emerging and threatening the development of
aquaculture all over the world. They cause production losses and some fish have to be discarded because they are
unsightly and not considered to be fit for human consumption. In Punjab (India), polyculture consists of Indian
major carps - Catla (Catla catla Ham.), rohu (Labeo rohita Ham.) and mrigal (Cirrhinus mrigala Ham.), and
exotic carps-silver carp ( Hypophthalmichthys molitrix Valen.), grass carp (Ctenopharyngodon idellus Valen.) and
common carp (Cyprinus carpio Linn.). In polyculture, carps were prone to several diseases like trichodiniosis,
haemorrhagic septicemia and various parasitic infectious diseases especially myxozoanosis. The different organs
were examined under the steroozoom trinocular microscope for the presence of pseudocysts of myxozoans and
clinical symptomatology if any. Intensity of the disease was recorded in gill pseudocyst Index (GPI) on the basis
of countable number of pseudocysts present per gill. Similarly Fin Plasmodial Index (FPI) and Scale Plasmodial
Index (SPI) were calculated for the intensity of infection. For identification, spores were studied fresh and in
stained preparations with Iron-haematoxylin and Ziehl-Neelsen. For tissue location, wax embedded sections (6-7
µm thick) of infected gills were stained with Luna’s method. The pseudocysts were located in the gill lamellae,
gill filament and also in the gill arch. A total of 30 species of myxosporean were found infecting various tissues
in the gills, scales and fins. Out of which 19 species belong to the genus Myxobolus, 7 species to the genus
Thelohanellus 3 species to the genus Henneguya and 1 species to genus Triangula. Parasitism was of three type-
bi, tri and polyparasitism. Clinical presentation and principal lesions caused by each species was recorded.