Research On Technology Of Comprehensive Prevention And Cure And Infectious Serositis To The Influence In Produce And Economic Performance Of Meat Ducks

This research passes the meat duck Infectious Serositis that the proper and good county takes place in the last few years to produce and the influence of the economic performance with technical study of comprehensive prevention and cure,It affects ducks of seven-day-old-over age,especially of fifteen～twenty-day-old age,mortality was ten～seventy percent.In the acute form, listlessness,neck tucked in,ocular and nasal discharges,diarrhea,incoordination, tremors of the head and neck,are commonly seen.The chronic form was a twisted neck.Typical lesions found in post-mortem bird were infected fibrinous pericarditis, perihepatitis,airsacculitis,and septicaemia.The pathogenic germ was easily isolated from liver,spleen and blood,especially from brain tissue.The detail physiological and biochemical identification,serotype identification and drug senitive test were done on thirty-eight strains.It showed that all strains didn't ferment glucose,maltose, fructose,lactose,mannitol,didn't disintegrate urea,didn't produce hydrogen sulfide, didn't deoxidize nitrate,catalase appeared positive,and could liquefy gelatine.The drug senitive test indicated that Riemerella anatipestifer(RA)was sensitive to ampicillin,cefalotin sodium,cefalexin,levofloxacin,apramycin sulfate,was insensitive to streptomycin,leucomycin.Its serotype was identified to be I by agglutination reaction.Vaccine,Chinese herbal medicine and Western medicine were applied to prevent and cure infectious serositis.There hundred and fifty ducklings were allocated randomly to six treatment groups and one control group with two replications:Each group was dealed with varied prescription:YajiangningⅠ,YajiangningⅡ, YajiangningⅠ+vaccine,YajiangningⅡ+vaccine,vaccine,and Western medicine+ vaccine were applied to treatments T1,T2,T3,T4,T5,andT6.Control group T7 was without any prescription.The result demonstrated that mortality of T1,T2,T3,T4,T5, and T6 was 8,6,8,4,10,13,and 22%respectively,T1,T2,T3,T4,were significantly lower than T6(P＜0.01);T1,T2,T3,T5 were not different compared with T4; difference between T4 and T6 appeared significant;T4 had the best effect on preventing and curing infectious serositis.At the same time,the cured rate could reach 70%by clinical cure;Different experiment the set to the meat duck produce and the economic performance all has different degree of influence,but the difference does not show(P＞0.05)In general,the application to Chinese herbal medicine+ vaccine,coordinating enough preparation before breeding and careful management practices were highly effective for prevention of infection,and it was valuable for use in ducks.