Investigation of Haemophilus parasuis from healthy pigs in China
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Fecha de publicación
2019-02-25ISSN
0378-1135
Resumen
Haemophilus parasuis is a common colonizer of the upper respiratory tract of swine and frequently causes disease, especially in weaner pigs. To date, limited epidemiological data was available for H. parasuis from healthy pigs, which might be carriers of potential pathogenic strains. In this study, from September 2016 to October 2017, we investigated the prevalence and characteristics of H. parasuis from healthy pigs in China. Totally, we obtained 244 isolates from 1675 nasal samples from 6 provinces. H. parasuis isolation was more successful in weaner pigs (22.6%, 192/849), followed by finisher pigs (9.3%, 43/463), and sows (2.5%, 9/363). The most prevalent serovars were 7 (20.1%, 49/244), followed by 3 (14.8%, 36/244), 2 (14.3%, 35/244), 11 (12.7%, 31/244), 5/12 (5.7%, 14/244) and 4 (2.5%, 6/244). Bimodal or multimodal distributions of MICs were observed for most of the tested drugs, which suggested the presence of non-wild type populations. It was noted that the MIC90 values of tilmicosin (64 μg/ml) was relatively higher than that reported in previous studies. Our results suggest that: 1) potentially pathogenic serovars of H. parasuis are identified in healthy pigs, and 2) elevated MICs and presence of mechanisms of resistance not yet described for clinically important antimicrobial agents would increase the burden of disease caused by H. parasuis.
Tipo de documento
Artículo
Versión del documento
Versión aceptada
Lengua
Inglés
Materias (CDU)
619 - Veterinaria
Páginas
21
Publicado por
Elsevier
Publicado en
Veterinary Microbiology
Citación
Zhang, Peng, Chaoyang Zhang, Virginia Aragon, Xue Zhou, Ming Zou, Congming Wu, and Zhangqi Shen. 2019. "Investigation Of Haemophilus Parasuis From Healthy Pigs In China". Veterinary Microbiology 231: 40-44. Elsevier BV. doi:10.1016/j.vetmic.2019.02.034.
Program
Sanitat Animal
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