Histopathological and Haematological investigations on Nandus nandus (Ham.) parasitized by metacercariae of Clinostomum complanatum (Rudolphi, 1819)

Pinky Kaur Pinky Kaur

doi:10.6088/ijes.00202030019

Abstract

The present investigation was carried out to study the effect of digenetic trematode, Clinostomum complanatum on histopathology and haematology of Nandus nandus. The body of the fluke is elongated with rounded ends measuring 5.13 – 8.40 mm in length and 2.20 – 3.24 mm in width. It was recovered from the branchial chamber, body cavity, liver, intestine and ovaries of Nandus nandus, showing the total prevalence of 42.8% and mean intensity of 2.13. Histopathological changes were observed mainly in the liver which were represented by loosening of hepatic tissue, eccentrically situated nuclei of hepatocytes and necrosis The haematological manifestation of the infected N. nandus showed marked decrease in the content of haemoglobin and RBC count, and increase in the count of lymphocytes and granuolocytes.

Highlights

Disease aetiology is a complex of three major components which includes the host, the parasite and the environment
Digenean metacercariae which occur in liver and other visceral organs cause severe melanosis of the liver and visceral fibrosis
The site occupied by the metacercariae is preferentially the gill chamber and behind opercula but in heavily infected fish, the parasites occur throughout the body cavity, liver, intestine and ovaries (Figure 1)

Summary

Introduction

Disease aetiology is a complex of three major components which includes the host (fish), the parasite (stressor) and the environment. The histological study of liver is helpful in knowing the possible effect of parasitism on the functions of different body systems. Blood is a good indicator to determine the health of an organism (Joshi et al, 2002). It acts as a pathological reflector of the whole body. The haematological parameters are important in diagnosing the functional status of the fish (host) infestated by helminth parasites (Joshi et al, 2002) and to evaluate the physiological condition and nutritional state of fish (Chagas and Val, 2003). Digenean metacercariae which occur in liver and other visceral organs cause severe melanosis of the liver and visceral fibrosis

Methods

Results

Conclusion