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Fowl typhoid caused by S.gallinarum to the substance of the liver, spleen and other organs of the lesions and diarrhea , septic infectious diseases , the disease can spread adult chickens and young chickens also vertical transmission . Great harm to the poultry industry . In recent years , in order to treat and prevent the disease , leading to overuse or abuse of antibiotics , antibiotic selective pressure , the resistance of Salmonella rising , and exhibit multiple resistance to antibiotics , the treatment of the disease extremely difficult . The test of Fuping County , Shaanxi Province , the onset of a chicken farm chicken Salmonella infection and antibiotic resistance situation study aims to provide some theoretical basis and data reference for clinical rational drug . 1. Collected from Fuping County , Shaanxi Province , the onset of a chicken farm chicken the 60 diseased liver , spleen , streaked ordinary agar under sterile conditions , respectively , at 37 ° C for 24 h of culture , Gram staining , microscopy under seen a large number of rounded ends , short and most of the the single small Gram-negative bacilli . Strains isolated pure culture of selected colonies typical 13 biochemical tests , the results show isolated 13 bacteria have the biochemical characteristics of the 10 found S.gallinarum , 3 can ferment lactose with reported previously . The pathogenicity tests show that isolated from S.gallinarum except S2 and S11 strain , all the chicks have strong pathogenicity . 21 kinds of antimicrobial susceptibility test 2 . The 13 S.gallinarum isolated and identified using the disk diffusion method , the results showed that the isolates to neomycin , amikacin highly sensitive to furazolidone , card The kanamycin moderately sensitive to cotrimoxazole , tetracycline , Pioneer will drug resistant . 3 will be screened amikacin the subsequent onset flocks of the incidence field by intramuscular injection of neomycin sulfate water treatment effect significant medication after 5 days , chickens restore appetite , the spirit greatly improved , feces yellow green Xifen significantly reduce the mortality significantly reduced the entire flock S.gallinarum disease incidence is reduced from 50% to about 5% . And then after 1 week , the incidence rate is almost reduced to zero.
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