Diversity of Yersinia enterocolitica isolated from pigs in a French slaughterhouse over 2 years

Abstract

The pig is one of the main reservoirs of Yersinia enterocolitica strains pathogenic to humans. A description of the Y. enterocolitica population in this reservoir, and accurate discriminatory techniques for typing isolates are needed for prevention, outbreak investigation, and surveillance. This study investigates the genetic diversity of pathogenic Y. enterocolitica isolates obtained from pig tonsils in a French pig slaughterhouse in 2009 (S1) and 2010 (S2). The use of Pulsed‐Field Gel Electrophoresis (PFGE) and MLVA as typing techniques was also compared and evaluated. First, a total of 167 isolates (12 of biotype 3 recovered during S1, and 155 of biotype 4 recovered during S1 and S2) were typed by PFGE using the XbaI enzyme. MLVA was then tested on all the biotype 3 isolates in addition to 70 selected biotype 4 isolates recovered over the 2 years. PFGE generated two specific XbaI‐PFGE profiles for biotype 3 isolates. Nine XbaI profiles were obtained for biotype 4, with a higher diversity (ID = 0.599) than biotype 3 (ID = 0.167). Two out of the nine XbaI profiles were reported during both surveys and at different months. MLVA improved the differentiation between isolates; the index of diversity reached 0.621 and 0.958, respectively, for biotype 3 (three MLVA types) and biotype 4 (32 MLVA types). The MLVA types for biotype 4 differed over the two surveys, but some isolates with different MLVA types were genetically closely related. This study provides an initial evaluation of the genetic diversity of Y. enterocolitica strains isolated from pigs in France. We show that some PFGE profiles are maintained in the pig production sector, and, through MLVA, that part of the Y. enterocolitica population remained genetically close over the two years. MLVA proved its effectiveness as a tool for investigating pathogenic Y. enterocolitica strains isolated from pigs.

Risk factors for sporadic Yersinia enterocolitica infections: a systematic review and meta-analysis

“…Indeed pigs are the main carriers of Y. enterocolitica (Drummond et al, 2012). Moreover, the main biotype isolated in pork, that is biotype 4 (Raymond et al, 2018) matches with the most common biotype isolated in sporadic cases. Despite this association, it should be noticed that consumption of raw, undercooked pork, is rarely associated with outbreaks (Grahek-Ogden et al, 2007;Self et al, 2017).…”

Detection, characterization, and antimicrobial susceptibility of Yersinia enterocolitica in different types of wastewater in the Czech Republic

“…enterocolitica and harbour the bacteria in their lymphatic tissue and intestinal contents. The pathogen is frequently isolated from faeces, tongues, tonsils, and carcasses (Bonardi et al, 2018; Raymond et al, 2019; Thong et al, 2018; Verbikova et al, 2018). Y .…”

Study of the activity and specifity of microseries of Yersinia Enterocolitica sera O3, O5, O6.30, O8, O9 in vitro SAT

“…В Нідерландах, Бельгії, Данії, Норвегії, Фінляндії, Німеччині, Японії, Канаді, Австралії кишковий ієрсиніоз в групі кишкових інфекцій за рівнем захворюваності займає третє місце після сальмонельозу та кампілобактеріозу, а в Росії -друге місце після сальмонельозу. Різні за інтенсивністю прояви ієрсиніозної інфекції реєструються в Казахстані, Узбекистані, Татарстані, Вірменії, в Республіці Бєларусь і Україні (Fukushima et al, 1985;Fredriksson-Ahomaa et al, 2006;Xu et al, 2014;Le Guern et al, 2016;Aepfelbacher & Wolters, 2017;Chlebicz & Śliżewska, 2018;Raymond et al, 2019). Наприклад, у Сполучених Штатах (у 38 штатах) зафіксовано як спорадичні, так і харчові спалахи ієрсиніозу, щорічно спостерігається 98 000 епізодів хвороб, 533 госпіталізації та 29 смертей (Chakraborty et al, 2015).…”