Bacteria belonging to the genus Bacillus isolated from honey bees, Apis mellifera, fed 2,4-D and antibiotics
Gilliam, M.; Morton, H.L.
Apidologie 93: 213-222
The guts of 388 adult worker honey bees, Apis melliftra, from caged control colonies, from colonies fed (2,4-dichlorophenoxy) acetic acid (2,4-D), and from colonies fed a combination of oxytetracycline and fumagillin were examined over a period of 13 months for organisms of the genus Bacillus. One hundred and ten organisms belonging to 13 species were identified. Bacillus megateriutn, B. subtilis, and B. pumilus were the most frequently isolated organisms and were found in bees in all three treatment groups. The antibiotics and 2,4-D reduced the number of bee guts containing Bacillus. No Bacillus organisms were isolated during the hot summer months of June-September. Thus, weather may also influence the composition of the gut microflora.