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. 2021 Aug 22;10(8):1019. doi: 10.3390/antibiotics10081019

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Inoculum effect of chloramphenicol (CHL; ●), erythromycin (ERY; ■), tetracycline (TET; ▲), cephalothin (CEP; ●), ciprofloxacin (CIP; ■), tobramycin (TOB; ▲) against different levels of antibiotic-sensitive Salmonella Typhimurium ATCC 19585 (ASST; (a)) antibiotic-resistant S. Typhimurium CCARM 8009 (ARST; (b)). Markers with different letters within an inoculum level (a–e) are significantly different among antibiotics at p < 0.05. *, **, and *** indicate significant difference between high (>6 log CFU/mL) and low (<5 log CFU/mL) inoculum levels at p < 0.05, p < 0.01, and p < 0.001, respectively.