White Grub Posthodiplostomum minimum centrarchi Metacercariae in the Liver of Largemouth Bass: Quantification and Effects on Health

Journal of Aijnatic Animal Health
Grizzle, ;Goldsby,
Disease, Toxicology & Pharmacology
Pub ID:
White grub Posthodiplostomum minimum centrarchi is a digenetic Iremulodc that
parasitizes centrarchid fishes. The prevalence and density of white grub mctacercariae in livers of
largemouth bass Micropterus salmoides from Lake Holly and Lake Weir. Florida, were determined
by two methods suitable for use with fixed tissue. Digestion of formal in-fixed tissue was used lo
determine the number of metacereariae per gram of liver, and stereologic examination of hisiologic
sections was used to determine the percentage of liver volume occupied by white grub cysts
(volume percent). The results of these two methods were significantly related. The prevalence of
white grub infection in largemouth bass was similar in these lakes; 94.1′/r for Lake Weir and
93.3% for Lake Holly. However, fish in Lake Weir had I 19 metacercariac/g of liver and -4.6% of
the liver volume was occupied by while grub cysts compared to only 20 metacercariae/g and
0.83% for fish from Lake Holly. There was no significant relation between the severity of white
grub infection and hematocrit. relative weight, or growth of the fish. While grub densities were
also unrelated to age, gender, total length, or weight of the fish.
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