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Egyptian Journal of Aquatic Biology and Fisheries
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S. Abd El-Halim Salama et al., S. (2022). Bacterial pathogens causing the blue crab (Callinectes sapidus) mortality at Suez Canal (El-Temsah Lake) in Ismailia Governorate. Egyptian Journal of Aquatic Biology and Fisheries, 26(2), 151-168. doi: 10.21608/ejabf.2022.226167
Soad S. Abd El-Halim Salama et al.. "Bacterial pathogens causing the blue crab (Callinectes sapidus) mortality at Suez Canal (El-Temsah Lake) in Ismailia Governorate". Egyptian Journal of Aquatic Biology and Fisheries, 26, 2, 2022, 151-168. doi: 10.21608/ejabf.2022.226167
S. Abd El-Halim Salama et al., S. (2022). 'Bacterial pathogens causing the blue crab (Callinectes sapidus) mortality at Suez Canal (El-Temsah Lake) in Ismailia Governorate', Egyptian Journal of Aquatic Biology and Fisheries, 26(2), pp. 151-168. doi: 10.21608/ejabf.2022.226167
S. Abd El-Halim Salama et al., S. Bacterial pathogens causing the blue crab (Callinectes sapidus) mortality at Suez Canal (El-Temsah Lake) in Ismailia Governorate. Egyptian Journal of Aquatic Biology and Fisheries, 2022; 26(2): 151-168. doi: 10.21608/ejabf.2022.226167

Bacterial pathogens causing the blue crab (Callinectes sapidus) mortality at Suez Canal (El-Temsah Lake) in Ismailia Governorate

Article 11, Volume 26, Issue 2, March and April 2022, Page 151-168  XML PDF (848.66 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2022.226167
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Author
Soad S. Abd El-Halim Salama et al.
Abstract
El-Temsah Lake is considered the largest water body in the Ismailia governorate, with a total area of 14 km2. A total number of 120 moribund crabs (Callinectes sapidus) were collected from El-Temsah Lake in front of the youth house, Ismailia Governorate, in September 2021. The analyses of water parameters revealed high concentrations of un-ionized ammonia and nitrite. Clinically, moribund C. sapidus showed loss of escape reflex, lethargy, sluggishness, easily catching, and shell lesions on the dorsal cuticle, swimming legs, and walking legs. Several affected C. sapidus showed softening of the cuticle. Internally, the intestine is devoid of food, gills show blackening, and a straw yellow fluid is accumulated around the hepatopancreas. Enterococcus gallinarum was isolated from hemolymph, gills, and shell then identified by traditional bacterial methods, Vitek 2 system, and DNA sequence. C. sapidus was infected with E. gallinarum, with rates of 90% and 83.33%, respectively, in sites 1 (El-Taween club) and 2 (Beach club). E. gallinarum was sensitive for Ciprofloxacin and Rifampicin; whereas, it showed resistance to Vancomycin, Erythromycin, Chloramphenicol, and Tetracycline. It was obvious that the high mortality rate of C. sapidus was associated with deleterious water quality and E. gallinarum infection.
Keywords
El-Temsah Lake; Blue Crab Callinectes sapidus; Enterococcus gallinarum; Ammonia
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