Abstract
SUMMARYThe sensitivity of five solid media for detection of Bacillus larvae spores in honey samples; J agar, MYPGP agar, brain heart infusion (BHIT) agar, Colombia agar and horse blood agar was compared in air or under 5% C02. MYPGP agar is superior to all other media tested for detection of low spore levels of B. larvae in honey. Incubation under 5% C02 enhances growth considerably, especially for MYPGP agar and J agar. The plating efficacy described here, where an average of 23% of inoculated spores germinated on MYPGP agar, is higher than reported elsewhere for B. larvae. Thus, contamination levels as low as 200 B. larvae spores/g of honey can be detected with more than 95% probability on MYPGP agar incubated under 5% C02 if 12 or more plates are inoculated.
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