Volume 17 ; Issue 1 ; in Month : 2024 (2024) Article No : 132
Podeti Koteshwar Rao

Abstract

Purpose: The objective of this work was to isolate and identify Aspergillus fumigatus from naturally infected Channa striatus. A total of 300 cultivated Channa striatus were gathered from Dharmasagar Lake in Hanamkonda. The study found that 7.5% of the studied fish were infected, with the highest occurrence of the disease observed between the winter and spring seasons. Methods: The fish that were infected displayed distinct ulcerative sores and fin rot. The oomycetes Aspergillus fumigatus, which resemble fungi, thrive on glucose peptone yeast (GPY) agar as colonies that are opaque and have an irregular white transparent velvet-like surface when kept at room temperature. Results: The microscopic analysis revealed the presence of fungal growth, which showed elongated, branched hyphae with a tapered end. These hyphae were thin and lacked septa and contained cytoplasmic organelles. The fungal growth was stained with lactophenol cotton green. Rectangular spores were observed within the hyphae on sporulating media, joined by thin filaments. Conclusions: In conclusions, EUS is an invasive disease of Channa striatus and care should be taken with low temperature in managing fish’s lake.

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