Investigating Vibrio harveyi Infections in Siganus rivulatus and Rhabdosargus haffara from the Red Sea, Hurghada, Egypt | ||
| International Journal of Comprehensive Veterinary Research | ||
| Volume 3, Issue 2, December 2025, Pages 39-48 PDF (940.64 K) | ||
| Document Type: Research article | ||
| DOI: 10.21608/ijcvr.2025.353682.1016 | ||
| Authors | ||
| Mahmoud Abdel-Rahman Mohamed Abdellah* 1; Mohamed Abd El-Aziz Ahmed Abd El-Galil2; Mahmoud Hashem Mohamed3; Fatma Abdel-Moghny Salem Mohamed4 | ||
| 1Fish diseases Lab., Aquaculture division, National institute of Oceanography and Fisheries, Hurghada branch | ||
| 2Fish Diseases and Management Department, Faculty of Veterinary Medicine, Sohag University, Sohag, Egypt | ||
| 3Fish Diseases Dept., Faculty of Veterinary Medicine, New Valley University, Egypt | ||
| 4Fish Diseases Lab., National Institute of Oceanography and Fisheries, Egypt | ||
| Abstract | ||
| This study investigated the prevalence of Vibrio harveyi infections in two marine fish species, Siganus rivulatus and Rhabdosargus haffara. The overall infection rate among the sampled fish was 11.23%. A significantly higher prevalence was observed in R. haffara (64.52%) compared to S. rivulatus (35.48%). These findings identify V. harveyi as a notable pathogen impacting both species, with R. haffara showing greater susceptibility. The identification of V. harveyi was conducted through morpho-chemical tests and experimental infection trials demonstrated its pathogenicity in both species with greater pathogenicity to R. haffara (70% mortality rate) in comparison with S. rivulatus (50% mortality rate). The histopathological examination of specimens from infected S. rivulatus revealed distinct changes in the tissue structure of the liver and kidney. The antimicrobial sensitivity test revealed that V. harveyi was highly sensitive to chloramphenicol, with additional sensitivity observed for tetracycline, ciprofloxacin, and ofloxacin. This underscores the critical need for monitoring and managing Vibrio infections to safeguard marine fish health and support sustainability in aquaculture industry. | ||
| Keywords | ||
| Red Sea; Vibrio harveyi; Siganus rivulatus; Rhabdosargus haffara; isolation | ||
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