Antibiotic-Resistant Vibrios in Farmed Shrimp

Table 2

Antimicrobial resistance pattern in vibrios isolated from the hemolymph of Litopenaeus vannamei shrimp.

Classification	Profile		Species (number of resistant isolates)
Monoresistance; ()	Pen	38	V. navarrensis (28), V. xuii (4), V.  coralliilyticus (3), V. brasiliensis (2), and V. alginolyticus (1)
	Atm	4	V. navarrensis (3) and V. diazotrophicus (1)
Cross-resistance to β-lactam; ()	Pen + Cpl	9	V. navarrensis (3), V. brasiliensis (3), V. xuii (2), and V. parahaemolyticus (1)
	Pen + Atm	5	V. navarrensis (4) and V. cholerae (1)
	Pen + Amp	2	V. navarrensis (2)
	Cro + Atm	1	V. navarrensis (1)
	Pen + Cpl + Amp	3	V. xuii (2) and V. brasiliensis (1)
Multiple resistance; ()	Pen + Tcy	8	V. parahaemolyticus (6), V. cholerae (1), and V. vulnificus (1)
	Pen + Tcy + Amp	5	V. parahaemolyticus (3) and V. cholerae (2)

: number of resistant isolates; Pen: penicillin G; Tcy: tetracycline; Amp: ampicillin; Cpl: cephalothin; Atm: aztreonam; Cro: ceftriaxone.