- Hado-Gentadox is a combination preparation containing gentamycin and doxycycline and provides a broad antibacterial spectrum covering the most microbial agents producing diseases in animals. Gentamycin belongs to the group of amino-glycoside antibiotics and has bactericidal action. It has a broad antibacterial spectrum and is active against Gram-positive and Gram-negative bacteria (including: Pseudomonas spp., Klebsiella spp., Enterobacter spp., Serratia spp., E. coli, Proteus spp., Salmonella spp., staphylococci). Moreover, it is active against Campylobacter fetus subsp. jejuni and Treponema hyodysenteriae. Gentamycin may be active against bacteria which are resistant to other amino-glycoside antibiotics (like Neomycin, Streptomycin, Kanamycin).