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Evaluation of antimicrobial compounds to inhibit growth of select Gram-positive pathogenic or antimicrobial resistant bacteria in air-exposed silage
- Source :
- Canadian Journal of Animal Science. 102:75-84
- Publication Year :
- 2022
- Publisher :
- Canadian Science Publishing, 2022.
-
Abstract
- Spoiled silages can harbor pathogenic and antimicrobial-resistant microbes. The potential of some antimicrobial additives to inhibit certain pathogenic and antimicrobial-resistant bacteria in air-exposed silage was measured using pure and mixed bacterial cultures. With pure cultures, laurate and monolaurin (5 mg·mL−1) caused decreases (P 7 log10 colony-forming units (CFU)·mL−1 in Listeria monocytogenes and Enterococcus faecalis compared to controls. Ten-fold higher amounts of these inhibitors were needed to equivalently decrease staphylococci. 2-Nitropropanol (1 mg·mL−1) decreased (P 10 CFU·mL−1 after 6 and 24 h incubations, respectively. In air-exposed whole-plant corn silage the inhibitors caused decreases, although not necessarily significant, of 0.7–2.2 log10 CFU·mL−1 in L. monocytogenes, staphylococci and culturable aerobes after 24 h incubation, with modest yet significant (P 10 CFU·mL−1) of yeasts and molds. Tests for carry-over effects against ruminal microbes revealed laurate, monolaurin, and 2-nitropropanol inhibited methanogenesis by >50% (P
- Subjects :
- Food Animals
Animal Science and Zoology
Subjects
Details
- ISSN :
- 19181825 and 00083984
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Canadian Journal of Animal Science
- Accession number :
- edsair.doi...........f4558a20c8cc9410aef31e1a3f4d4d2a