Mortality of therapeutic fish Garra rufa caused by Aeromonas sobria

Objective:To investigate a case of mass mortality of Garra rufa(G.rufa)from a fish hatchery farm in Slovakia.Methods:Causative bacterial agent was swabbing out of affected fish skin area and subsequently identified using commercial test system.Antibiotic susceptibility was determined by the disk diffusion method.Results:Infected G.rufa was characterized by abnormal swimming behaviour,bleeding of skin lesions and local haemorrhages.Despite of using recommended aquatic antibiotic treatment no improvement was achieved and Aeromonas sobria{A.sobria)was identified as a causative agent of fish mortality.Due to massive fish mortality,antibiotic susceptibility of pure isolated culture of A.sobria was evaluated employing eight antibiotics against human infections.A.sobria was resistant only against one antibiotic,namely ampicilin.Conclusions:These results indicate that A.sobria can act as a primary pathogen of G.rufa and may be a potential risk factor for immunodeficient or immunoincompetent patients during the ichthyotherapy.

Morphological differences among the Garra rufa populations(Cyprınıdae)in Tigris River system of Southeast Turkey

Objective:To determine morphometric and meristic variations betweenGarra rufa(G.rufa)samples obtained from different locality in Tigris River.Methods:Transformed morphometric characters were subjected to discriminant analysis and according to grouping model,number of discriminant function and morphologic variation between populations with respect to their importance of explaining total variation were determined.Results:Success rate of classifying the groups according to the results of discriminant analysis of morphometric characters ofG.rufa individuals,belonging to seven different localities of Tigris and Euphrates river system revealed as 56.7%.Savur stream group showed different distribution from the other groups.Success rate of classifying the groups according to the discriminant analysis of meristic characters ofG.rufa individuals appeared as 56.32%.Conclusions:Devege?idi Dam Lake and Kulp stream groups were the ones which showed the most different distributions in the discriminant analysis.Between locality groups ofG.rufa individuals belonging to Cyprinidae family,meristic and especially morphometric variations were significantly found in the consequent of discriminant analysis.

温泉鱼致病性类志贺邻单胞菌和舒氏气单胞菌的分离鉴定和药敏试验

从患病的淡红墨头鱼(Garra rufa)病鱼体内分离到两株致病菌(G1和S1)。对该菌进行系统的形态特征、培养特性、主要生理生化和人工感染等试验,结果表明两株菌均为革兰氏阴性杆菌,G1菌株V-P、氧化酶、ONPG、葡萄糖和尿素等为阳性,硫化氢、七叶苷和甘露醇等为阴性;S1菌株V-P、尿素、硫化氢、七叶苷和甘露醇等为阴性,氧化酶、ONPG和葡萄糖等为阳性。根据菌株的形态特征、培养特性和理化特征,确定G1菌株为类志贺邻单胞菌(Plesiomonas shigelloides);S1菌株为舒氏气单胞菌(Aermonas schubertii)。药物敏感性试验结果表明:舒氏气单胞菌对壮观霉素、利福平、洛美沙星、四环素、头孢氨噻肟、头孢曲松和氟哌酸敏感,而对磺胺异恶唑和氨苄青霉素不敏感;类志贺邻单胞菌对奈啶酸、丙氟哌酸、呋喃妥因、头孢氨噻肟、利福平、头孢曲松、磺胺异恶唑和氟哌酸敏感,但对氨苄青霉素和甲氧苄啶不敏感。