Oxytetracycline (Alamycin LA) is specifically formulated to provide a prolonged action resulting in sustained antibacterial activity. blood levels persist for at least 4 days. After administration by the intramuscular route, macimum blood levels are achieved after 4 to 8 hours making Alamycin LA suitable for treatment of acute infections. Ocytetracycline has been shown to be effective in vitro against the following bacterial species: Bordetella Bronchiseptica, corynebacterium pyogenes, erysipelothrix rhusiopathiae, Escherichia coli, Haemophilus somnus, Pastuerella haemolytica, Pasteurelle multocida, Salmonella dublin, Staphylococcus aureus, Streptococcus agalactiae, Streptococcus faecalis, Streptococcus pyogenesandStreptococcus uberis.