Microbiological Quality Assessment by PCR and Its Antibiotic Susceptibility in Mangrove Crabs (Ucides cordatus) from Guanabara Bay, Rio de Janeiro, Brazil

Table 6

Multiple antimicrobial resistance of E. coli and Vibrio strains found in crab.

	Antimicrobial resistance	MAR index
E. coli
(3)	CN, TOB	0.12
(1)	CFO, TOB	0.12
(1)	CN, KF, TOB	0.18
(2)	AK, CN, TOB	0.18
(1)	C, CAZ, CN, TOB	0.25
(1)	C, CN, KF, SAM	0.25
(1)	CN, CFO, KF, TOB	0.25
(1)	AK, AMP, C, CAZ, CN, TOB	0.31
(1)	AK, CN, KF, SAM, TE, TOB	0.31
Vibrio
(14)	AK, AMP	0.12
(6)	AMP, KF	0.12
(2)	AK, KF	0.12
(2)	CTX, KF	0.12
(2)	AK, CN, CTX	0.18
(1)	AK, CTX, KF	0.18
(2)	CN, CTX, KF	0.18
(1)	AK, CIP, KF, LEV	0.25
(1)	AK, CTX, CN, KF	0.25

The MAR (multiple antimicrobial resistance) index of an isolate is defined as , where represents the number of antibiotics to which the isolate was resistant and represents the number of antibiotics to which the isolate was subjected. AK: amikacin; AMP: ampicillin; AMC: amoxicillin + clavulanic acid; C: chloramphenicol, CAZ: ceftazidime; CFO: cefoxitin; CIP: ciprofloxacin; CN: gentamicin; CTX: cefoxitin; KF: cephalothin; LEV: levofloxacin; OFX: ofloxacin; SAM: ampicillin/sulbactam; TOB: tobramycin; TE: tetracycline.