Abstract
House fly larvae provide a prolific and sustainable source of proteins used in poultry and fish feed. Wheat bran is a superior diet for house fly larvae and has been widely investigated to exploit its potential in the food and feed area. Using Illumina MiSeq 16S rDNA sequencing, this study investigated the gut microbiota of house fly larvae feeding on wheat bran and the bacterial community in the wheat bran. The bacterial communities in the house fly larvae were dominated by the phyla Proteobacteria and Firmicutes. Enterobacteriaceae and Providencia were the predominant bacteria at the family and genus levels, respectively. Some bacteria in the phyla Actinobacteria, Proteobacteria, Bacteroidetes and Firmicutes may be transferred from the gut of house flies to the wheat bran during feeding and may be involved in degrading and utilizing polysaccharides in the cell wall of wheat bran. The significance of the gut microbiota of house fly larvae, their transferring and roles in degradation of wheat bran is discussed. These findings regarding the gut microbiota of house fly larvae will provide opportunities for research on the impact of microbial communities on poultry and fish.
Highlights
The house fly, Musca domestica, is a cosmopolitan and synanthropic insect that serves as a vector for many human diseases (Gupta et al 2012)
Bacterial diversity in house fly larvae The bacterial communities in the house fly larvae samples were dominated by the phyla Proteobacteria and Firmicutes (Fig. 1a)
The relative abundance of the phylum Actinobacteria was much higher in Md72h and Md96h samples than in the other three M. domestica samples (Fig. 1a)
Summary
The house fly, Musca domestica, is a cosmopolitan and synanthropic insect that serves as a vector for many human diseases (Gupta et al 2012). The larvae are resource insects with important potential applications. The larvae could be used in swine manure bioconversion and pollution control (Zhang et al 2014). The larvae represent a sustainable and prolific source of proteins used in poultry and fish feed (Van 2013). Because large volumes are required to supplement commercial poultry diets, the rearing technology for fly larvae requires further development. House flies can reproduce and develop in poultry and pig manure (Akpodiete et al 1997; Zhu et al 2012), but there are still a number of challenges to be addressed, including safety issues related to pathogens, heavy metals, and organic pollutants (Van 2013)
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