Main Composition: Doxycycline hyclate Properties: Doxycycline has a abroad spectrum of action against a wide range of Gram-positive and Gram-negative pathogenic bacteria, including some which are resistant to penicillin. Organisms that are sensitive to this tetracycline in the concentration usually achieved in the body during treatment, including Bacillus anthracis, Bordetella spp, Staphylococci, Streptococci, Mycoplasma, certain Rickettsia, Chlamydia, Actinomyces spp., large viruses are also sensitive to doxycycline. In addition, a report of the antimicrobial activity of doxycycline showed that, It is more effective than other tetracyclines against most species such as staphylococci and mechanisms. Doxycyclines bind reversibly to bacterial 30 S ribosome and inhibit protein synthesis, perhaps by several mechanisms. Indications: It is indicated for the treatment and prevention of bacterial infection caused by Gram-positive and Gram-negative mycoplasma and bacteria such as colibacillosis, salmonellosis, CRD, airsacculitis, infectious coryza, infectious sinusitis in poultry pneumonia and enteritis in livestock.