CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES ›› 2017, Vol. 35 ›› Issue (2): 120-124.

• ORIGINAL ARTICLES • Previous Articles     Next Articles

Isolation and identification of cultivable symbiotic bacteria from the intestinal tract of Musca domestica during development

Jing LIU1, Dan CHEN1, Gui-fen ZHUANG1, Zhen-dong HUANG1, Zhi-jing XUE1, Rui-ling ZHANG1,2, Zhong ZHANG1,2,*()   

  1. 1 Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Taishan Medical University, Taian 271016, China
    2 Department of Pathogen Biology, Taishan Medical University, Taian 271016, China
  • Received:2016-08-06 Online:2017-04-20 Published:2017-05-02
  • Contact: Zhong ZHANG E-mail:nasonia@163.com
  • Supported by:
    Supported by National Natural Science Foundation of China(No. 81401693, 81572028, 81271874), and the Science and Technology Development Project of Shandong Province(No. 2014GSF121007)

Abstract:

Objective To identify the intestinal cultivable bacteria in Musca domestica at different development stages. Methods Five eggs or 5 larvae at day 1 after egg hatch were collected under aseptic conditions, and were homogenized in 1 ml sterile water. At day 2 or above, 5 larvae. 5 pupae, and 5 adult worms were also collected, and their intestinal tract was isolated and homogenized in 1 ml sterile water. The intestinal symbiotic bacteria were cultured from the homogenate. Single colonies with different morphology were picked up and cultured in LB medium for small-scale production. DNA was extracted to amplify 16S rDNA by PCR. The amplification products were sequenced and blasted in GenBank to determine the bacteria genus. The numbers of genera at different developmental stages were recorded. Results A total of 26 bacterial genera were obtained, comprising 11 in larvae stage, 19 in pupae stage, and 14 in adult worms. None cultivable symbiotic bacterium was isolated from eggs. There were genus overlaps between stages. The larvae and pupae stages shared 6 genera, consisting of Proteus, Kurthia, Bordetella, Microbacterium, Alcaligenes and Leuconostoc. The pupae and adult stages shared 3 genera, consisting of Sphingobacterium, Enterococcus and Ochrobactrum. The larvae and adult stages shared 1 genus, the Klebsiella. The three stages shared 4 genera, consisting of Providencia, Staphylococcus, Myroides and Pseudomonas. The proportions of gram-positive bacteria were 4/11, 6/19 and 3/14 in the larvae, pupae and adult stages, respectively. Conclusion The genus number of cultivable bacteria from Musca domestica shows a trend of increase followed by a decrease during the development from larvae to pupae stage, accompanied with a gradual decrease of proportions of gram-positive bacteria.

Key words: Musca domestica, Metamorphotic development, Intestine, Cultivable symbiotic bacteria

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