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Xi'an Hengtong Guanghua Pharmaceutical Co.,Ltd
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Tylosin is a specific antibiotic for poultry and livestock. It can avoic the problems lf cross infection and drug resistance caused by mixed usage of drugs for human and animals． It has uncomparable advantages to other kinds of macrolides aritibiotics. It is the newly admitted National Third class new veterinary medicine．As a kind of specific antibiotic for poultry and livestock，it has some special advantage：
Tylosin is highly effective to mycoplasma infection and publicly recognized as the first choice to treat mycoplasma disease． Wide antibacterial spectrum：Tylosin has high activity against grampositive（staphlococcus aureus，streptoccus, iplococcus，corynebacterium，erysipelothrix, clostridium），some of gram－negative（P.haemolytica,Proteus，salmonella,shigella,klebsiella,Ent．Aerogenes，Fusiformis nodosus,Mycobacterium), vibrio,spirochete，and coccidiosis，etc．Good penetration capacity（it can permeate blood－testi brrier,blood brain barrier，and blood eye barrier），quick absorption by oral taking（normally it can get the maximum concen-
trationin blood in 2－3 hour after oral taking；and its absorption rate is bviously higher than that of erythromycin and leuxomycin），wide spreading in tissue（the largest amount produced in lung，liver, kidney, spleen). and high biological efficiency （quick in effect；long duration in keeping bacteriostatic concentration，quick excretion after stopping the medicine；little residue，as well as safe and reliable）.only small dosage is needed when functioned as feed additive，and the growth promotion function iS apparent.
Tylosin tartrate is the tartrate of tylosion, and it is usually used as drinking doses．
Molecular formula：（C48H77NO 17）2C4H6O2
Molecular weight： 1982.31
Tylosin phosphate is the phosphate of tylosion often used as feed additive．
Molecular formula：C46H77NO17H3PO4
Molecular weight：lO14．11
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