{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T20:05:18Z","timestamp":1791230718585,"version":"4.1.0"},"reference-count":66,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2018,2,9]],"date-time":"2018-02-09T00:00:00Z","timestamp":1518134400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Genes"],"abstract":"<jats:p>The current global crisis of antimicrobial resistance (AMR) among important human bacterial pathogens has been amplified by an increased resistance prevalence. In recent years, a number of studies have reported higher resistance levels among Listeria monocytogenes isolates, which may have implications for treatment of listeriosis infection where resistance to key treatment antimicrobials is noted. This study examined the genotypic and phenotypic AMR patterns of 100 L. monocytogenes isolates originating from food production supplies in Australia and examined this in the context of global population trends. Low levels of resistance were noted to ciprofloxacin (2%) and erythromycin (1%); however, no resistance was observed to penicillin G or tetracycline. Resistance to ciprofloxacin was associated with a mutation in the fepR gene in one isolate; however, no genetic basis for resistance in the other isolate was identified. Resistance to erythromycin was correlated with the presence of the ermB resistance gene. Both resistant isolates belonged to clonal complex 1 (CC1), and analysis of these in the context of global CC1 isolates suggested that they were more similar to isolates from India rather than the other CC1 isolates included in this study. This study provides baseline AMR data for L. monocytogenes isolated in Australia, identifies key genetic markers underlying this resistance, and highlights the need for global molecular surveillance of resistance patterns to maintain control over the potential dissemination of AMR isolates.<\/jats:p>","DOI":"10.3390\/genes9020080","type":"journal-article","created":{"date-parts":[[2018,2,9]],"date-time":"2018-02-09T12:46:27Z","timestamp":1518180387000},"page":"80","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":79,"title":["Phenotypic and Genotypic Analysis of Antimicrobial Resistance among Listeria monocytogenes Isolated from Australian Food Production Chains"],"prefix":"10.3390","volume":"9","author":[{"given":"Annaleise","family":"Wilson","sequence":"first","affiliation":[{"name":"CSIRO Agriculture and Food, Werribee, VIC 3030, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jessica","family":"Gray","sequence":"additional","affiliation":[{"name":"CSIRO Agriculture and Food, Werribee, VIC 3030, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P.","family":"Chandry","sequence":"additional","affiliation":[{"name":"CSIRO Agriculture and Food, Werribee, VIC 3030, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edward","family":"Fox","sequence":"additional","affiliation":[{"name":"CSIRO Agriculture and Food, Werribee, VIC 3030, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2018,2,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"635","DOI":"10.1089\/fpd.2010.0806","article-title":"Molecular Diversity of Listeria Monocytogenes Isolated from Irish Dairy Farms","volume":"8","author":"Fox","year":"2011","journal-title":"Foodborne Pathog. 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