Styles D K, Flammer K
Department of Companion Animal and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh 27606.
Avian Dis. 1991 Jan-Mar;35(1):46-8.
Binding of Congo red dye by Escherichia coli is associated with the pathogenicity of the organism. The purpose of the present study was to determine the incidence of Congo red binding exhibited by E. coli isolated from the cloacae of psittacine birds, to examine the association between the Congo red status of the E. coli isolates and the health status of birds, and to assess the potential value of Congo red binding as a screening test for identifying pathogenic strains of E. coli isolated form the cloacae of psittacine birds. Escherichia coli was isolated from the cloacae of 120/435 (28%) psittacine birds; 17/120 (14%) of the E. coli isolates bound the dye (Congo red-positive) and 103/120 (86%) did not bind the dye (Congo red-negative). All of the Congo red-positive isolates were recovered from subjectively abnormal birds, whereas Congo red-negative isolates were recovered from both subjectively normal (71/120 [59%]) and abnormal (32/120 [27%]) birds.
刚果红染料与大肠杆菌的结合与该生物体的致病性相关。本研究的目的是确定从鹦鹉科鸟类泄殖腔分离出的大肠杆菌表现出刚果红结合的发生率，研究大肠杆菌分离株的刚果红状态与鸟类健康状况之间的关联，并评估刚果红结合作为一种筛选试验用于鉴定从鹦鹉科鸟类泄殖腔分离出的大肠杆菌致病菌株的潜在价值。从120只（占435只的28%）鹦鹉科鸟类的泄殖腔中分离出大肠杆菌；120株大肠杆菌分离株中有17株（14%）结合该染料（刚果红阳性），103株（86%）不结合该染料（刚果红阴性）。所有刚果红阳性分离株均从主观上异常的鸟类中分离得到，而刚果红阴性分离株则从主观上正常（120株中的71株[59%]）和异常（120株中的32株[27%]）的鸟类中分离得到。
