Mar del Plata AFB strain were similar to those obtained
against others P. larvae strains isolated from infected
honeybee brood combs of Buenos Aires province
(Gende et al., 2008b). In relation with minimal inhibitory
concentration of the antibiotic, the Mar del Plata
strain was susceptible by introducing a value of MIC
less than 5 μg/ml (Alippi, 1996).