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Chinese Journal of Biological Control ›› 2023, Vol. 39 ›› Issue (3): 690-696.DOI: 10.16409/j.cnki.2095-039x.2021.07.019

• SCIENTIFIC NOTES • Previous Articles     Next Articles

Isolation and Identification of Intestinal Bacteria from Leeks and Analysis of Antibiotic Sensitivity

SONG Jian1, ZHANG Haijian1, LIU Li2, LIU Jianhu1, CAO Weiping1   

  1. 1. Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences/IPM Center of Hebei Province/Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China, Ministry of Agriculture, Baoding 071000, China;
    2. Hebei Provincial General Station of Plant Protection and Quarantine, Shijiazhuang 050000, China
  • Received:2022-02-27 Online:2023-06-08 Published:2023-06-25

Abstract: To investigate the structure of intestinal culturable bacteria and antibiotic sensitivity of Bradysia odoriphaga larvae the intestinal bacteria of the third-instar B.odoriphaga larvae were isolated and cultured and identified by 16S rDNA, and were tested for drug sensitivity with 23 kinds of antibiotics. The results showed that the six types of intestinal bacteria isolated and identified belonged to Microbacilli Oxydans HQ202813.1, Staphylococcus vitulinus MN640907.1, Bacillus cereus CP045606.2, Bacillus sp. Mg914019.1, Serratia fonticola MH379711.1, Bacillus safensis MN704552.1 was named as B.o1, B.o2, B.o3, B.o4, B.o5 and B.o6. The antibiotic sensitivity test of six culturable bacteria showed that B.o1 was sensitive to 21 kinds of antibiotics, among which, it was resistant to polymyxin and fosfomycin. B.o2 was sensitive to 21 antibiotics, and showed resistance to acetylspirin and lincomycin. B.o3 was sensitive to 19 antibiotics and resistant to penicillin, ampicillin and polymyxin. B.o4 was sensitive to 19 antibiotics and resistant to penicillin, ampicillin, lincomycin and polymyxin. B.o5 was sensitive to 15 antibiotics and resistant to penicillin, ampicillin, gentamicin, naphthimidine, erythromycin, azithromycin, medemycin and polymyxin. B.o6 was resistant to ampicillin and fosfomycin, and sensitive to the other 19 antibiotics. To sum up, the intestinal bacterial flora of leek maggot larvae is diverse and has the phenomenon of natural drug resistance. This study provides a basis for further research on intestinal microbial flora and functional bacteria of B. odoriphaga larvae.

Key words: Bradysia odoriphaga, gut, bacteria, antibiotic susceptibility

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