Serotype diversity and antimicrobial susceptibility profiles of Actinobacillus pleuropneumoniae isolated in Italian pig farms from 2015 to 2022

IF 3.7 1区 农林科学 Q1 VETERINARY SCIENCES
Flavia Guarneri, Claudia Romeo, Federico Scali, Simona Zoppi, Nicoletta Formenti, Antonio Marco Maisano, Salvatore Catania, Marcelo Gottschalk, G. Loris Alborali
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Abstract

Actinobacillus pleuropneumoniae (APP) is a bacterium frequently associated with porcine pleuropneumonia. The acute form of the disease is highly contagious and often fatal, resulting in significant economic losses for pig farmers. Serotype diversity and antimicrobial resistance (AMR) of APP strains circulating in north Italian farms from 2015 to 2022 were evaluated retrospectively to investigate APP epidemiology in the area. A total of 572 strains isolated from outbreaks occurring in 337 different swine farms were analysed. The majority of isolates belonged to serotypes 9/11 (39.2%) and 2 (28.1%) and serotype diversity increased during the study period, up to nine different serotypes isolated in 2022. The most common resistances were against tetracycline (53% of isolates) and ampicillin (33%), followed by enrofloxacin, florfenicol and trimethoprim/sulfamethoxazole (23% each). Multidrug resistance (MDR) was common, with a third of isolates showing resistance to more than three antimicrobial classes. Resistance to the different classes and MDR varied significantly depending on the serotype. In particular, the widespread serotype 9/11 was strongly associated with florfenicol and enrofloxacin resistance and showed the highest proportion of MDR isolates. Serotype 5, although less common, showed instead a concerning proportion of trimethoprim/sulfamethoxazole resistance. Our results highlight how the typing of circulating serotypes and the analysis of their antimicrobial susceptibility profile are crucial to effectively manage APP infection and improve antimicrobial stewardship.
2015 年至 2022 年意大利养猪场分离的胸膜肺炎放线杆菌的血清型多样性和抗菌药敏感性概况
胸膜肺炎放线杆菌(APP)是一种经常与猪胸膜肺炎相关的细菌。该病的急性型具有高度传染性,通常会导致死亡,给养猪户造成重大经济损失。为了调查该地区的 APP 流行病学,我们对 2015 年至 2022 年期间意大利北部猪场中流行的 APP 菌株的血清型多样性和抗菌药耐药性(AMR)进行了回顾性评估。共分析了从 337 个不同猪场爆发的疫情中分离出的 572 株菌株。大多数分离株属于血清型 9/11(39.2%)和 2(28.1%),血清型的多样性在研究期间有所增加,到 2022 年分离出 9 种不同的血清型。最常见的耐药性是四环素(53%的分离株)和氨苄西林(33%),其次是恩诺沙星、氟苯尼考和三甲双胍/磺胺甲噁唑(各占23%)。多重耐药性(MDR)很常见,三分之一的分离菌株对三种以上的抗菌药产生耐药性。血清型不同,对不同种类抗生素的耐药性和 MDR 也有很大差异。特别是,广泛存在的血清型 9/11 与氟苯尼考和恩诺沙星耐药性密切相关,并显示出最高比例的 MDR 分离物。血清型 5 虽然不太常见,但却显示出对三甲双胍/磺胺甲噁唑耐药的比例很高。我们的研究结果突出表明,对循环血清型进行分型并分析其抗菌药敏感性谱对于有效控制 APP 感染和改善抗菌药管理至关重要。
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来源期刊
Veterinary Research
Veterinary Research 农林科学-兽医学
CiteScore
7.00
自引率
4.50%
发文量
92
审稿时长
3 months
期刊介绍: Veterinary Research is an open access journal that publishes high quality and novel research and review articles focusing on all aspects of infectious diseases and host-pathogen interaction in animals.
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