Table 1. MIC determination and antimicrobial resistance genes of S. Eko isolates from different sources in the north-eastern region of Nigeria.
| Sample no. | Origin | Resistance breakpoints (μg/ml) and percent similarity of resistance genes | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| AMP R>8 | blaTEM-1 | STR R>16 | strA | SMX R>256 | sul2 | TET R>8 | tetA | TMP R>2 | dfrA14 | ||
| 2/3 | Cattle/lymph nodes | 2 | - | 16 | - | 512 | - | < = 2 | - | < = 1 | - |
| 40/3 | Cattle/lymph nodes | 2 | - | 16 | - | 256 | - | < = 2 | - | < = 1 | - |
| 47/3 | Cattle/lymph nodes | 2 | - | 16 | - | 256 | - | 4 | - | 2 | - |
| 48/3 | Cattle/lymph nodes | 2 | - | 16 | - | < = 64 | - | < = 2 | - | < = 1 | - |
| 53/3 | Cattle/lymph nodes | 2 | - | 16 | - | < = 64 | - | < = 2 | - | < = 1 | - |
| 62/3 | Cattle/lymph nodes | < = 1 | - | 16 | - | < = 64 | - | < = 2 | - | < = 1 | - |
| 31/3 | Cattle/ intestine | 2 | - | 32 | - | 256 | - | < = 2 | - | < = 1 | - |
| 88/3 | Cattle/ intestine | 2 | - | 16 | - | 128 | - | < = 2 | - | < = 1 | - |
| 93/3 | Cattle/ intestine | 2 | - | < = 8 | - | < = 64 | - | < = 2 | - | < = 1 | - |
| 82/3 | Cattle/liver | 2 | - | 16 | - | 256 | - | < = 2 | - | < = 1 | - |
| 85/3 | Cattle/liver | < = 1 | - | < = 8 | - | 512 | - | < = 2 | - | < = 1 | - |
| 19/3 | Camel/ intestine | 2 | - | 16 | - | 256 | - | < = 2 | - | < = 1 | - |
| 60/3 | Camel/ intestine | < = 1 | - | 16 | - | < = 64 | - | < = 2 | - | < = 1 | - |
| 96/3 | Camel/ intestine | 2 | - | < = 8 | - | 128 | - | < = 2 | - | < = 1 | - |
| 43/3 | Camel/feces | 2 | - | 16 | - | 512 | - | < = 2 | - | < = 1 | - |
| 39/3 | Camel/spleen | 2 | - | 16 | - | 256 | - | < = 2 | - | < = 1 | - |
| 64/3 | Camel/spleen | 2 | - | < = 8 | - | 128 | - | < = 2 | - | < = 1 | - |
| 94/3 | Camel/spleen | < = 1 | - | < = 8 | - | 256 | - | < = 2 | - | < = 1 | - |
| 9 | Fish/intestine | >32 | + | 16 | + | >1024 | + | >32 | + | > = 32 | + |
| 10 | Human/feces | >32 | + | 16 | + | >1024 | + | >32 | + | > = 32 | + |
| 29 | Human/feces | >32 | + | 16 | + | >1024 | + | >32 | + | > = 32 | + |
| 44/3 | Human/feces | 4 | - | 32 | - | 256 | - | < = 2 | - | < = 1 | - |
| 90 | Human/feces | >32 | + | 16 | + | >1024 | + | >32 | + | > = 32 | + |
| 91 | Human/feces | >32 | + | 16 | + | >1024 | + | >32 | + | > = 32 | + |
| 92 | Human/feces | > = 32 | + | 16 | + | > = 1024 | + | > = 32 | + | > = 32 | + |
MIC (μg/mL) determined in accordance with CLSI standards. Abbreviations: +, presences of the resistance gene; AMP, ampicillin; STR, streptomycin; SMX, sulfamethoxazole; TET, tetracyclin; TMP, trimethoprim. The isolates were susceptible to the following antimicrobial agents: AMC, amoxicillin-clavulanic acid; APR, apramycin; CHL, chloramphenicol; CIP, ciprofloxacin; COL, colistin; CTX, cefotaxime; FFN, florfenicol; GEN, gentamicin; NAL, nalidixic acid; NEO, neomycin; SPT, spectinomycin; XNL, ceftiofur.