Decreasing trend of β-lactam resistance in Salmonella isolates from broiler chickens due to the cessation of ceftiofur in ovo administration

Duc, Vu Minh; Kakiuchi, Rina; Muneyasu, Hiroka; Toyofuku, Hajime; Obi, Takeshi; Chuma, Takehisa

doi:10.1016/j.vas.2022.100248

Cited by 2 publications

(1 citation statement)

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“…Although the prevalence of TGC-resistant Salmonella spp. in chicken products and broilers has increased since 2005 [ 5 , 10 , 24 , 28 ], the prevalence has decreased after withdrawing the use of TGC in broiler production in 2012 [ 5 , 35 ]. We recently reported that 1.3% (4/309) of Salmonella isolates (three S .…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial resistance profiles of Campylobacter jejuni and Salmonella spp. isolated from enteritis patients in Japan

Sasaki

Ikeda

Yonemitsu

et al. 2023

The Journal of Veterinary Medical Science

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Understanding the antimicrobial resistance of Campylobacter jejuni and Salmonella spp. isolated from patients with enteritis will aid in therapeutic decisionmaking. This study aimed to characterize C. jejuni and Salmonella spp. isolates from patients with enteritis. For C. jejuni, the resistance rates against ampicillin, tetracycline, and ciprofloxacin were 17.2%, 23.8%, and 46.4%, respectively. All the C. jejuni isolates were susceptible to erythromycin, which is recommended as a first-choice antimicrobial if Campylobacter enteritis is strongly suspected. C. jejuni was classified into 64 sequence types (STs), and the five major STs were ST22, ST354, ST21, ST918, and ST50. The ciprofloxacin-resistance rate of ST22 was 85.7%. For Salmonella, the resistance rates against ampicillin, cefotaxime, streptomycin, kanamycin, tetracycline, and nalidixic acid were 14.7%, 2.0%, 57.8%, 10.8%, 16.7%, and 11.8%, respectively.All the Salmonella spp. isolates were susceptible to ciprofloxacin. Therefore, fluoroquinolones are the recommended antimicrobials against Salmonella enteritis. S.Thompson, S. Enteritidis, and S. Schwarzengrund were the three most prevalent serotypes. The two cefotaxime-resistant isolates were serotyped as S. Typhimurium and were found to harbor blaCMY-2. The results of this study would help select antimicrobials for treating patients with Campylobacter and Salmonella enteritis.

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