College of Life Science and Food Engineering, Hebei University of Engineering, Handan, China.
College of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China.
Vet Microbiol. 2018 Feb;214:36-43. doi: 10.1016/j.vetmic.2017.11.030. Epub 2017 Nov 23.
Candida albicans is the most prevalent opportunistic fungus of humans and animals. While most studies focus on human isolates, they rarely focus on poultry isolates. In this study, C. albicans strains were recovered from poultry in the southern Hebei Province (China) and identified. Molecular typing and analyses were performed to understand the molecular epidemiology and genetic relatedness of the strains. The fungi were isolated from live birds with presumed candidiasis or their corpses. The isolates were identified based on morphology, differential medium culture, and rDNA internal transcribed spacer sequencing. The identified C. albicans strains were analyzed by ABC genotyping and multilocus sequence typing. Clonal groups were identified using the eBURST (version 3.0) software, and an UPGMA phylogenetic tree was constructed using the MEGA (version 6.06) software. Overall, 72 isolates were divided into three genotypes (A, B, and C), 48 novel sequence types (STs), five groups with 10 singletons, and four clades. Results indicated that candidiasis is common in poultry in the southern Hebei Province, and that the genetic composition of the C. albicans poultry population from the area is relatively complicated. Based on the eBURST analysis for the STs in this study and others, we suggest that C. albicans poultry isolates were relatively independent but not completely separated from human isolates. The strains with the same or closely related genotypes but recovered from both birds and humans could have transferred and evolved between the two types of host.
白色念珠菌是人类和动物中最常见的机会性真菌。虽然大多数研究都集中在人类分离株上,但很少关注家禽分离株。在这项研究中,从中国河北省南部的家禽中回收了白色念珠菌菌株并进行了鉴定。进行了分子分型和分析,以了解菌株的分子流行病学和遗传相关性。真菌是从疑似念珠菌病的活禽或其尸体中分离出来的。根据形态、差异培养基培养和 rDNA 内转录间隔区测序对分离物进行鉴定。对鉴定出的白色念珠菌菌株进行 ABC 基因分型和多位点序列分型分析。使用 eBURST(版本 3.0)软件鉴定克隆群,使用 MEGA(版本 6.06)软件构建 UPGMA 系统发育树。总体而言,72 株分离株分为三种基因型(A、B 和 C)、48 种新的序列型(ST)、5 个群,包含 10 个单倍型和 4 个分支。结果表明,河北省南部的家禽中念珠菌病很常见,该地区白色念珠菌家禽种群的遗传组成相对复杂。基于本研究和其他研究的 ST 进行的 eBURST 分析,我们建议家禽分离株的白色念珠菌相对独立但与人类分离株没有完全分离。来自鸟类和人类的具有相同或密切相关基因型的菌株可能在两种宿主之间发生了转移和进化。