Infectious processes caused by germs sensitive to Gentamicin and Trimethoprim-Sulfonamide, including respiratory tract-infections, metritis, pielitis, pyelonephritis, cystitis, uretritis, pasteurellosis young animals diarrhea, mammitis. It is highly effective against E.coli and Salmonella infections. Prophylactic administration at day old has proven effective in preventing early chick mortality.