Nystatin is a polyene antibiotic, in 1950 the soil microorganism Streptomyces noursei was found to be able to secrete an anti-mold substance, thus discovering the first anti-mold antibiotic. Mycoplasma has a conjugated polyene macrocyclic lactone structure, which can inhibit the activity of fungi and dermatophytes, and has no inhibitory effect on bacteria.

It is mainly used for internal treatment of fungal infection of digestive tract or external use for fungal infection of surface skin. Such as fungal gastritis in cattle, fungal disease of chicken and turkey feeding sacs, etc. For mastitis caused by Aspergillus and Trichoderma, milk duct perfusion is also effective. Pneumonia of chicks caused by Aspergillus fumigatus, spray inhalation is also effective. This product is also used for long-term administration of broad-spectrum antibiotics caused by fungal secondary infections.

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