Overview
Kitasamycin Premix is a formulated veterinary product containing kitasamycin, a macrolide antibiotic derived from Streptomyces kitasatoensis. As a feed additive, it is widely used in animal husbandry to enhance growth performance and control bacterial infections in livestock and poultry. The premix formulation ensures uniform distribution in feed, typically containing 2-10% active ingredient with carriers like calcium carbonate. The antibiotic was first isolated in Japan in the 1950s and has since become an important tool in intensive farming systems. Its use is regulated in many countries, with specific guidelines on dosage levels and withdrawal periods before slaughter to ensure food safety.
Physical and Chemical Properties
Kitasamycin exists as a white crystalline powder in pure form, though premixes often appear off-white due to carriers. It is stable under normal storage conditions but degrades under strong acids, bases, or prolonged exposure to heat above 40°C. The compound shows good solubility in organic solvents like methanol and ethanol, but limited water solubility (approximately 2 mg/mL). Chemically, it belongs to the leucomycin family of 16-membered macrolides, with kitasamycin A being the primary active component. The premix formulation enhances stability and handling characteristics compared to pure antibiotic powder, making it more practical for large-scale feed production.
Main Applications
The primary use of kitasamycin premix is as a growth promoter in swine and poultry production, typically added at 5-40 ppm in finished feed depending on local regulations. It improves feed conversion ratios by approximately 5-8% in controlled conditions. The antibiotic also prevents and treats respiratory and enteric infections caused by susceptible Gram-positive bacteria including Staphylococcus, Streptococcus, and some Mycoplasma species. In swine production, it's particularly effective against Mycoplasma pneumonia. For poultry, it helps control chronic respiratory disease. Some formulations combine kitasamycin with other additives like vitamins or probiotics to create comprehensive feed supplements. Use is generally prohibited in organic farming systems.
Safety and Storage
Proper handling of kitasamycin premix requires protective equipment to prevent inhalation or skin contact, as antibiotic exposure may cause sensitization in some individuals. Storage should be in original sealed containers at temperatures below 30°C, with relative humidity under 75% to prevent caking. The premix has a typical shelf life of 24 months when stored correctly. Regulatory compliance is critical - most jurisdictions mandate withdrawal periods (usually 3-7 days before slaughter) and prohibit use in laying hens or dairy animals. Cross-contamination with human food must be avoided, requiring dedicated equipment for medicated feed production. Disposal should follow local pharmaceutical waste guidelines.
B2B Procurement Guide
When sourcing kitasamycin premix, prioritize suppliers with GMP certification for veterinary pharmaceuticals. Key procurement considerations include: verifying active ingredient content through COA (Certificate of Analysis), confirming the premix meets your local regulatory standards, and evaluating carrier material compatibility with your feed production process. For large-volume purchases (typically >1 metric ton), negotiate based on purity specifications rather than just price. Consider logistical factors like packaging (25kg bags with inner liners are standard) and supplier ability to provide regulatory documentation. Some manufacturers offer customized premix formulations with specific concentrations or additional nutrients. Always audit supplier quality systems before long-term contracts.
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