Bacterial Infection in Common Lowland Frog (Hoplobatrachus rugulosus) and Antibiotic Susceptibility

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ไกรจักร - แก้วพรม

Abstract

This study aimed to investigate the distribution of pathogenic bacteria in 232 common lowland frog diseases, some factors affecting the disease and guidelines for bacterial disease prevention and treatment of frog in Nadoon District, Maha Sarakham Province, during August to November, 2016. Totally 8 genera including Aeromonas spp., the most dominantly, followed by Staphylococcus spp., Pseudomonas spp., Bacillus spp., Rhodococcus spp., Streptococcus spp., Lactobacillus and Serratia spp., respectively. Water quality analysis showed pH, temperature, hardness and alkalinity were suitable for frogs, but the low dissolved oxygen, high total ammonia-N (NH3-N) and nitrite (NO2-) may damage to frogs. Pathogenicity test of 2 dominant genera, Aeromonas and Staphylococcus, found that both genera could affected to 3 stages of frog; tadpole, young frog and adult frog. A bath challenge at 105 cfu/mL could induce morbidity and mortality in the range of 40.00 - 76.67 % and 26.67 - 60.00 %, respectively. At the concentration 106 and 107 cfu/mL found higher disease induction and death. Moreover, Aeromonas showed higher virulence than Staphylococcus but faster symptom development and mortality in all stages. Antibiotic susceptibility test of 8 genera including Aeromonas spp., Staphylococcus spp., Pseudomonas spp., Bacillus spp., Lactobacillus spp., Streptococcus spp., Rhodococcus spp. and Serratia spp., 30 isolates, on 20 antibiotics found that oxytetracycline showed highest sensitivity, followed by Norfloxacin, Tetracycline, Enrofloxacin and Gentamycin, respectively. While Ampicillin, Penicillin G, Sulphamethoxazone, Nitrofurantoin and Amoxycillin found highest resistant.

Article Details

How to Cite
[1]
แก้วพรม ไ. .-., “Bacterial Infection in Common Lowland Frog (Hoplobatrachus rugulosus) and Antibiotic Susceptibility”, RMUTI Journal, vol. 13, no. 1, pp. 115–128, Dec. 2019.
Section
บทความวิจัย (Research article)

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