Antimicrobial susceptibility, multilocus sequence typing, and virulence of listeria isolated from a slaughterhouse in Jiangsu, China

Wu, Liting; Bao, Hongduo; Yang, Zhengquan; He, Tao; Tian, Yuan; Zhou, Yan; Pang, Maoda; Wang, Ran; Zhang, Hui

doi:10.1186/s12866-021-02335-7

Table 3 Antimicrobial-resistance profiles of Listeria isolates from the four areas (n = 59)

From: Antimicrobial susceptibility, multilocus sequence typing, and virulence of listeria isolated from a slaughterhouse in Jiangsu, China

Source and no. of resistant strains (%)
Antibitocs (ug/ml)		Slaughter area n = 7	Cutting and deboning room n = 9	Visceral area n = 23	Meat cooling and refrigeration area n = 20	Total
GEN	R ≥ 16	0 (0.00%)	0 (0.00%)	L. welshimeri (1) (4.35%)	L. welshimeri (1) (5.00%)	2 (3.39%)
	I = 8	0 (0.00%)	0 (0.00%)	L.m (1) (4.35%)	0 (0.00%)	1 (1.69%)
	S ≤ 4	L. innocua (1) L. m(6) (100.00%)	L. innocua (2) L. m (7) (100.00%)	L. innocua (1) L. welshimeri (9) L. m (11) (91.30%)	L. innocua (3) L. welshimeri (3) L. m(13) (95.00%)	56 (94.92%)
CAZ	R ≥ 32	L. innocua (1) L. m(6) (100.00%)	L. innocua (2) L. m (7) (100.00%)	L. innocua (1) L. welshimeri(10) L. m (11) (95.65%)	L. innocua (3) L. welshimeri (4) L. m (13) (100.00%)	58 (98.31%)
	I = 16	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)
	S ≤ 8	0 (0.00%)	0 (0.00%)	L. welshimeri (1) (4.35%)	0 (0.00%)	1 (1.70%)
AMP	R ≥ 32	L. m (1) (14.29%)	0 (0.00%)	0 (0.00%)	0 (0.00%)	1 (1.69%)
	I = 16	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)
	S ≤ 8	L. innocua (1) L. m (5) (85.71%)	L.innocua (2) L. m (7) (100.00%)	L. innocua (1) L. welshimeri (11) L. m (11) (100.00%)	L. innocua (3) L. welshimeri (4) L. m (13) (100.00%)	58 (98.31%)
CIP	R ≥ 4	L. innocua (1) L. m (6) (100.00%)	L. innocua (2) L. m (6) (88.89%)	L. innocua (1) L. welshimeri(10) L. m (11) (95.65%)	L. innocua (3) L. welshimeri (4) L. m (13) (100.00%)	57 (96.61%)
	I = 2	0 (0.00%)	0 (0.0%)	L. welshimeri (1) (4.35%)	0 (0.0%)	1 (1.69%)
	S ≤ 1	0 (0.00%)	L. m (1) (11.11%)	0 (0.00%)	0 (0.00%)	1 (1.69%)
TET	R ≥ 16	L. m (1) (14.29%)	L. innocua (2) L. m (1) (33.33%)	L. innocua (1) L. welshimeri (2) L. m (1) (17.39%)	L. innocua (1) L. m (1) (10.00%)	10 (16.95%)
	I = 8	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)
	S ≤ 4	L. innocua (1) L. m (5) (85.71%)	L. m (6) (72.7%)	L. welshimeri (9) L. m (10) (82.61%)	L. innocua (2) L. welshimeri (4) L. m (12) (90.00%)	49 (83.05%)
ERY	R ≥ 8	0 (0.00%)	0 (0.00%)	L. welshimeri (1) L. m (1) (8.70%)	L. welshimeri (1) L. m (1) (10.00%)	4 (6.78%)
	I = 1–4	L. m (2) (28.57%)	L. innocua (2) L. m (4) (66.67%)	L. innocua (1) L. welshimeri (7) L. m (3) (47.83%)	L. welshimeri (2) L. m (8) (50.00%)	29 (49.15%)
	S ≤ 0.5	L. innocua (1) L. m (4) (71.43%)	L. m (3) (33.33%)	L. welshimeri(3) L. m (7) (43.48%)	L. innocua (3) L. welshimeri(1) L. m (4) (40.00%)	26 (44.07%)
LIN	R ≥ 4	L. innocua (1) L. m (5) (85.71%)	L. innocua (2) L. m (7) (100.00%)	L. innocua (1) L. welshimeri (9) L. m (11) (91.30%)	L. innocua (3) L. welshimeri (4) L. m (12) (95.00%)	55 (93.22%)
	I = 1–2	L. m (1) (14.29%)	0 (0.00%)	L. welshimeri (2) (8.70%)	L. m (1) (5.00%)	4 (6.78%)
	S -	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)
VAN	R ≥ 32	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)
	I = 8–16	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)	0 (0.00%)
	S ≤ 4	L. innocua (1) L. m (6) (100.00%)	L. innocua (2) L. m (7) (100.00%)	L. innocua (1) L. welshimeri (11) L. m (11) (100.00%)	L. innocua (3) L. welshimeri (4) L. m (13) (100.00%)	59 (100.00%)

GEN gentamicin, CAZ ceftazidime, AMP ampicillin, CIP ciprofloxacin, TET tetracycline, ERY erythromycin, LIN lincomycin, VAN vancomycin

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