Journal
INSECT SCIENCE
Volume 22, Issue 5, Pages 606-618Publisher
WILEY
DOI: 10.1111/1744-7917.12155
Keywords
A; florea; DGGE; gut bacteria community; larvae; 16S rRNA gene
Categories
Funding
- Thailand Research Fund [BRG5580013]
- National Research University Project under Thailand's Office of Higher Education
- New York University College of Dentistry Faculty Research Fund
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This study characterizes the colonization and composition of bacterial flora in dwarf Asian honeybee (Apis florea) larvae and compares bacterial diversity and distribution among different sampling locations. A. florea larvae were collected from 3 locations in Chiang Mai province, Thailand. Bacterial DNA was extracted from each larva using the phenol-chloroform method. Denaturing gradient gel electrophoresis was performed, and the dominant bands were excised from the gels, cloned, and sequenced for bacterial species identification. The result revealed similarities of bacterial community profiles in each individual colony, but differences between colonies from the same and different locations. A. florea larvae harbor bacteria belonging to 2 phyla (Firmicutes and Proteobacteria), 5 classes (Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Bacilli, and Clostridia), 6 genera (Clostridium, Gilliamella, Melissococcus, Lactobacillus, Saccharibacter, and Snodgrassella), and an unknown genus from uncultured bacterial species. The classes with the highest abundance of bacteria were Alphaproteobacteria (34%), Bacilli (25%), Betaproteobacteria (11%), Gammaproteobacteria (10%), and Clostridia (8%), respectively. Similarly, uncultured bacterial species were identified (12%). Environmental bacterial species, such as Saccharibacter floricola, were also found. This is the first study in which sequences closely related to Melissococcus plutonius, the causal pathogen responsible for European foulbrood, have been identified in Thai A. florea larvae.
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