Two dominant strains of bacteria Lb18-01 and Lb18-02 were isolated and purified from scabies,liver and intestine of diseased Peodiscus sinensis.By artificial infection test,the two strains were verified as pathogenic ...Two dominant strains of bacteria Lb18-01 and Lb18-02 were isolated and purified from scabies,liver and intestine of diseased Peodiscus sinensis.By artificial infection test,the two strains were verified as pathogenic strains with similar characters to that of natural infectious cases.The strains Lb18-01 and Lb18-02 showed strong pathogenicity to healthy P.sinensis in the artificial infection experiment,so they were the pathogenic strain of the disease.According to the morphology,physicochemical characteristics,16 S rDNA sequence analysis and phylogenetic tree clustering,the pathogenic strains Lb18-01 and Lb18-02 were identified as Proteus vulgaris and Chryseobacterium meningosepticum which were tolerant to 20 drugs such as penicillin,tetracycline and ampicillin.Histopathological observation on diseased P.sinensis showed the pathological symptoms of sepsis such as hemorrhage and congestion of liver,spleen and intestine,and glomerular disintegration.展开更多
[目的]分离并鉴定棘胸蛙歪头病病原。[方法]从患歪头病棘胸蛙(Quasipaa spinosa)体内分离到致病菌,分别采用4种不同方式进行人工感染试验,通过形态观察、生理生化试验、16S r DNA测序等方法进行鉴定,并采用抑菌圈研究该菌株对12种抗生...[目的]分离并鉴定棘胸蛙歪头病病原。[方法]从患歪头病棘胸蛙(Quasipaa spinosa)体内分离到致病菌,分别采用4种不同方式进行人工感染试验,通过形态观察、生理生化试验、16S r DNA测序等方法进行鉴定,并采用抑菌圈研究该菌株对12种抗生素的敏感性。[结果]除口服方式外,肌肉注射、皮肤损伤浸泡、皮肤不损伤浸泡感染途径均能使棘胸蛙发病并导致死亡,且对蛙有较强的致病性。通过生理生化试验和16S r DNA测序等方法鉴定致病菌为脑膜炎败血金黄杆菌(Chryseobacterium meningosepticum)。药敏试验结果表明:该致病菌对万古霉素、头孢哌酮、庆大霉素和红霉素高度敏感,而对吡哌酸、链霉素、四环素、诺氟沙星、青霉素、新霉素、林可霉素、先锋霉素不敏感。[结论]棘胸蛙歪头病病原为脑膜炎败血金黄杆菌。展开更多
基金Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals(2018TP1027)Key R&D Projects of Hunan Province(2018NK2074).
文摘Two dominant strains of bacteria Lb18-01 and Lb18-02 were isolated and purified from scabies,liver and intestine of diseased Peodiscus sinensis.By artificial infection test,the two strains were verified as pathogenic strains with similar characters to that of natural infectious cases.The strains Lb18-01 and Lb18-02 showed strong pathogenicity to healthy P.sinensis in the artificial infection experiment,so they were the pathogenic strain of the disease.According to the morphology,physicochemical characteristics,16 S rDNA sequence analysis and phylogenetic tree clustering,the pathogenic strains Lb18-01 and Lb18-02 were identified as Proteus vulgaris and Chryseobacterium meningosepticum which were tolerant to 20 drugs such as penicillin,tetracycline and ampicillin.Histopathological observation on diseased P.sinensis showed the pathological symptoms of sepsis such as hemorrhage and congestion of liver,spleen and intestine,and glomerular disintegration.
文摘[目的]分离并鉴定棘胸蛙歪头病病原。[方法]从患歪头病棘胸蛙(Quasipaa spinosa)体内分离到致病菌,分别采用4种不同方式进行人工感染试验,通过形态观察、生理生化试验、16S r DNA测序等方法进行鉴定,并采用抑菌圈研究该菌株对12种抗生素的敏感性。[结果]除口服方式外,肌肉注射、皮肤损伤浸泡、皮肤不损伤浸泡感染途径均能使棘胸蛙发病并导致死亡,且对蛙有较强的致病性。通过生理生化试验和16S r DNA测序等方法鉴定致病菌为脑膜炎败血金黄杆菌(Chryseobacterium meningosepticum)。药敏试验结果表明:该致病菌对万古霉素、头孢哌酮、庆大霉素和红霉素高度敏感,而对吡哌酸、链霉素、四环素、诺氟沙星、青霉素、新霉素、林可霉素、先锋霉素不敏感。[结论]棘胸蛙歪头病病原为脑膜炎败血金黄杆菌。
