Borges Clarissa A, Cardozo Marita V, Beraldo Livia G, Oliveira Elisabete S, Maluta Renato P, Barboza Kaline B, Werther Karin, Ávila Fernando A
Department of Veterinary Pathology, Faculty of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, 14884900, Brazil.
Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, 13083872, Brazil.
J Microbiol. 2017 May;55(5):344-348. doi: 10.1007/s12275-017-6523-3. Epub 2017 Mar 9.
In order to describe the role of wild birds and pigeons in the transmission of shiga toxigenic Escherichia coli (STEC) and enteropathogenic Escherichia coli (EPEC) to humans and other animals, samples were collected from cloacae and oropharynx of free-living wild birds and free-living pigeons. Two STEC (0.8%) and five EPEC strains (2.0%) were isolated from wild birds and four EPEC strains (2.0%) were recovered from pigeons. Serogroups, sequence types (STs) and virulence genes, such as saa, iha, lpfA , ehxA, espA, nleB and nleE, detected in this study had already been implicated in human and animal diseases. Multidrug resistance (MDR) was found in 25.0% of the pigeon strains and in 57.0% of the wild bird strains; the wild birds also yielded one isolate carrying extended-spectrum β-lactamases (ESBLs) gene bla . The high variability shown by PFGE demonstrates that there are no prevalent E. coli clones from these avian hosts. Wild birds and pigeons could act as carriers of multidrug-resistant STEC and EPEC and therefore may constitute a considerable hazard to human and animal health by transmission of these strains to the environment.
为了描述野生鸟类和鸽子在向人类和其他动物传播产志贺毒素大肠杆菌（STEC）和肠致病性大肠杆菌（EPEC）中的作用，从自由生活的野生鸟类和自由生活的鸽子的泄殖腔和口咽部采集了样本。从野生鸟类中分离出2株STEC（0.8%）和5株EPEC菌株（2.0%），从鸽子中分离出4株EPEC菌株（2.0%）。本研究中检测到的血清型、序列类型（STs）和毒力基因，如saa、iha、lpfA、ehxA、espA、nleB和nleE，已被认为与人类和动物疾病有关。在25.0%的鸽子菌株和57.0%的野生鸟类菌株中发现了多重耐药性（MDR）；野生鸟类还产生了一株携带超广谱β-内酰胺酶（ESBLs）基因bla的分离株。PFGE显示的高变异性表明，这些鸟类宿主中不存在普遍流行的大肠杆菌克隆。野生鸟类和鸽子可能是多重耐药性STEC和EPEC的携带者，因此可能通过将这些菌株传播到环境中，对人类和动物健康构成相当大的危害。
