Email this article STUDY ON BIOLOGICAL CHARACTERISTICS OF BACTERIA STRAINS ACTINOBACILLUS PLEUROPNEUMONIAE ISOLATED FROM PIGS SUFFERING FROM PNEUMONIA RAISED IN HIEP HOA DISTRICT, BAC GIANG PROVINCE
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Received: 20/02/20 Revised: 09/06/20 Published: 11/06/20Authors
1. Nguyen Quang Tinh
, TNU - University of Agriculture and Forestry2. Nguyen Manh Hung, Nutrition Joint Stock company
3. Do Bich Due, TNU - Life Sciences Institute
Abstract
The results showed that the rate of pneumonia in pigs in Hiep Hoa district, Bac Giang province was 28.91% and the death rate was 18.41%. 91 samples were taken from pigs suspected to be infected with pneumonia by four age groups, all of which isolated A. pleuropneumoniae. The isolation rate of A. pleuropneumoniae is 14.29%; the highest rate of A. pleuropneumoniae isolation in pigs after weaning from 1.5 to 3 months of age was 30.0% and the lowest in newborn pigs to 1.5 months of age was 8.0%. The isolated A. pleuropneumoniae has biological characteristics consistent with the characteristics of bacteria described in all previous publics as ability to catch gram-negative color, urease reaction, catalase, oxidase, CAMP, O.N.P.G, Indol account for 100% in the test samples, do not grow on MaConkey agar medium. Among 13 isolates, 7 strains belong to serotype 2, accounting for 53.85%; 4 strains of serotype 5a accounted for 30.77%; 1 strain of serotype 5b accounts for 7.69%. The strains of A. pleuropneumoniae are highly susceptible to antibiotics such as ceftiofur, florfenicol, amoxicillin, ofloxacin and are resistant to some antibiotics such as neomycin, colistin, tetracycline.
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