Aeromonas sobria infection in farmed mud loach (Misgurnus mizolepis) in Korea, a bacteriological survey
نویسندگان
چکیده مقاله:
A disease outbreak occurred in June 2012 among mud loach cultured on pond farms in Jangseong-gun, Jeollanam-do, Korea. Mortality rates reached up to 1.2% in the farm per day. Typical clinical signs were bleeding ulcer at the middle portion of head and haemorrhagic erosion of the operculum. Based on biochemical characteristics, the causative bacterium isolated from diseased fish was identified as Aeromonas sobria. The isolate expressed two haemolytic genes, aerolysin (sob) and haemolysin (asa1) genes.Histopathologically, liver showed hepatocellular vacuolar degeneration and congestion in sinusoids. The spleen exhibited necrotized splenocytes and haemorrhagic pulps. In the kidney, glomerular destruction, renal tubular necrosis and haemorrhage were observed. Experimental infection (infectious dose of 106, 107, and 108 cfu fish-1) of healthy mud loach with the isolate resulted in the development of clinical signs similar to those seen in the farm. By injection with an infectious dose of 106 cfu fish-1, the mortality rate was 10.3% within 7 days post infection. A mortality rate of 60.9% was reached within 2 days when an infectious dose of 107 cfu fish-1 was used. Otherwise, all fish died within 1 day when injected with 108 cfu fish-1. The results demonstrated that A. sobria is involved in the morbidity and mortality of the farmed mud loach.
منابع مشابه
Aeromonas sobria infection in farmed mud loach (Misgurnus mizolepis) in Korea, a bacteriological survey.
A disease outbreak occurred in June 2012 among mud loach cultured on pond farms in Jangseong-gun, Jeollanam-do, Korea. Mortality rates reached up to 1.2% in the farm per day. Typical clinical signs were bleeding ulcer at the middle portion of head and haemorrhagic erosion of the operculum. Based on biochemical characteristics, the causative bacterium isolated from diseased fish was identified a...
متن کاملaeromonas sobria infection in farmed mud loach (misgurnus mizolepis) in korea, a bacteriological survey
a disease outbreak occurred in june 2012 among mud loach cultured on pond farms in jangseong-gun, jeollanam-do, korea. mortality rates reached up to 1.2% in the farm per day. typical clinical signs were bleeding ulcer at the middle portion of head and haemorrhagic erosion of the operculum. based on biochemical characteristics, the causative bacterium isolated from diseased fish was identified a...
متن کاملGene structure and expression characteristics of liver-expressed antimicrobial peptide-2 isoforms in mud loach (Misgurnus mizolepis, Cypriniformes)
Background: Liver-expressed antimicrobial peptide-2 (LEAP-2) is an important component of innate immune system in teleosts. In order to understand isoform-specific involvement and regulation of LEAP-2 genes in mud loach (Misgurnus mizolepis, Cypriniformes), a commercially important food fish, this study was aimed to characterize gene structure and expression characteristics of two paralog LEAP-...
متن کاملCharacterization and expression profiles of aquaporins (AQPs) 1a and 3a in mud loach Misgurnus mizolepis after experimental challenges
Two distinct cDNAs encoding aquaporins (mmAQPs 1a and 3a) were isolated and characterized from mud loach Misgurnus mizolepis. The identified mud loach AQP cDNAs encode for polypeptides of 260 and 302 amino acids. Topology predictions confirmed six putative membrane-spanning domains connected by five loops and the Nand C-terminal domains being cytoplasmic. The mud loach AQPs 1a and 3a showed bro...
متن کاملPredation efficacy of the fish muddy loach, Misgurnus mizolepis, against Aedes and Culex mosquitoes in laboratory and small rice plots.
Assessments of the biological control potential of muddy loaches, Misgurnus mizolepis, were conducted against Aedes togoi, Culex pipiens pallens, and Culex inatomii larvae both in the laboratory and in small rice plots in Pusan, Korea, from June to September 1997. Medium-sized fish consumed almost all of 500 3rd-stage larvae of Cx. pipiens pallens offered daily in the laboratory. Predation by t...
متن کاملFatal infection with Aeromonas sobria and Plesiomonas shigelloides.
525 vaccine. The vaccine contained formaldehyde detoxified, aluminium adsorbed diphtheria and tetanus toxins, 25 and 75 flocculation units/ml respectively (SBL, Sweden). The subjects were randomised by using sealed envelopes to receive the vaccine subcutaneously (21 subjects) or intracutaneously (18). The mean age was 29-8 (range 23-43) years, with no difference between the groups. Seven of the...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ذخیره در منابع من قبلا به منابع من ذحیره شده{@ msg_add @}
عنوان ژورنال
دوره 16 شماره 2
صفحات 194- 201
تاریخ انتشار 2015-06-20
با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023