Streptococcal infections are becomi

Streptococcal infections are becoming an increasing problem in aquaculture and have been reported worldwide in a
variety of fish species. Here we describe the isolation and characterization of Streptococcus iniae from Asian sea bass (Lates
calcarifer) and red tilapia (Oreochromis sp.) cultured in southern Thailand. Conventional and rapid identification systems,
as well as the polymerase chain reaction (PCR), were used to determine that the isolate was S. iniae. The virulence of this
S. iniae was higher in Asian sea bass than in red tilapia, as shown by the 10 day-LD50 in Asian sea bass and red tilapia, being
1.08x104
and 1.14x107
CFU, respectively. Histopathological changes in Asian sea bass are more severe than those observed
in red tilapia. The changes can be found in several organs including liver, pancreas, heart, eye and brain. Histopathological
findings included cellular necrosis, infiltration of lymphocytes and granuloma formation in the infected organs.

ผลลัพธ์ (แอฟริกา) 1:

Streptokokkale infeksies steeds 'n toenemende probleem in Akwakultuur en is wêreldwyd berig in 'n
Verskeidenheid van visspesies. Hier het ons beskryf die isolasie en karakterisering van Streptococcus iniae uit Asiatiese See Bass (lates
calcarifer) en Rooi Tilapia (Oreochromis SP.) Gekweek in Suider Thailand. Konvensionele en vinnige identifikasie Systems,
sowel as die polimerase kettingreaksie (PCR), is gebruik om te bepaal dat die isoleer was S. iniae. Die virulensie van hierdie
S. iniae See Bass was in Asiatiese hoër as in Red Tilapia, soos getoon deur die 10-Day LD50 in Asiatiese See Bass en Rooi Tilapia, wat
1.08x104
en 1.14x107
CFU, onderskeidelik. Histopatologiese veranderinge in Asiatiese See Bass is erger as dié wat
in die Rooi Tilapia. Die veranderinge kan gevind word in verskeie organe, insluitend lewer, pankreas, hart, oog en brein. Histopatologiese
bevindinge ingesluit Cellular nekrose, infiltrasie van limfosiete en granuloom formasie in die besmette organe.