Table 2.

Prevalence of tetracycline and sulfonamide resistance in relation to the total number of Salmonella isolates.

Studies	No. of Salmonella Isolates	Tetracycline-Resistant Isolates n (%)	Isolates with tet Genes n (%)	Sulfonamide-Resistant Isolates n (%)	Isolates with sul Genes n (%)
Aslam et al. 2012 [45]	110	54 (49.0%)	45 (40.9%)	9 (8.0%)	9 (8.0%)
Dahshan et al. 2010 [46]	44	44 (100%)	10 (22.7%)	44 (100%)	8 (18.2%)
Deng et al. 2017 [38]	152	123 (80.9%)	123 (80.9%)	98 (64.5%)	60 (39.5%)
Dessie et al. 2013 [27]	33	23 (69.7%)	8 (24.2%)	31 (93.9%)	26 (78.8%)
El-Sharkawy et al. 2017 [47]	67	61 (91.0%)	58 (86.6%)	3 (5.2%)	58 (86.6%)
Hsu et al. 2014 [48]	54	18 (33.3%)	14 (26.0%)	20 (37.0%)	16 (29.6%)
Igbinosa 2015 [44]	150	73 (48.7%)	0	99 (66.0%)	*
Iwu et al. 2016 [39]	48	48 (100%)	30 (61.0%)	36 (75.0%)	*
Khoshbakht et al. 2018 [49]	60	60 (100%)	6 (10.0%)	*	*
Kozak et al. 2009 [50]	234	*	*	*	210 (89.7%)
Lapierre et al. 2010 [51]	69	65 (94.2%)	49 (71.0%)	19 (27.5%)	*
Lopes et al. 2015 [52]	225	122 (54.5%)	73 (32.5%)	89 (39.6%)	65 (28.9%)
Maka et al. 2015 [7]	84	*	*	84 (100%)	76 (90.5%)
Marquéz et al. 2017 [53]	39	19 (47.6%)	6 (14.3%)	15 (38.1%)	4 (9.5%)
Mthembu et al. 2019 [54]	106	67 (63.0%)	25 (26.0%)	41 (38.0%)	22 (21.0%)
Sadiq et al. 2017 [40]	4	3 (75.0%)	3 (75.0%)	*	*
Soyer et al. 2013 [55]	336	296 (88.0%)	44 (13.1%)	282 (84.0%)	49 (14.6%)
Tajbakhsh et al. 2012 [56]	71	18 (25.0%)	34 (48.0%)	21 (30.0%)	23 (32.0%)
Thai et al. 2012 [57]	97	47 (48.5%)	40 (41.2%)	55 (56.7%)	52 (53.6%)
Vital et al. 2017 [41]	24	16 (66.7%)	21 (87.5%)	*	*
Vuthy et al. 2017 [58]	181	157 (86.7%)	117 (64.6%)	156 (86.2%)	78 (43.1%)
Xu et al. 2019 [10]	18	*	*	13 (72.2%)	14 (77.8%)
Zhu et al. 2017 [43]	189	98 (51.9%)	84 (44.4%)	91 (48.1%)	89 (47.1%)
Zhu et al. 2019 [59]	155	143 (92.0%)	32 (20.6%)	81 (52.2%)	29 (18.7%)
Zishiri et al. 2016 [42]	146	136 (93.0%)	128 (87.7%)	123 (84.0%)	125 (85.6%)

* Antimicrobials were not tested, or genes were not searched in the study.