... agents (penicillin,ampicillin, cephalotin, gentamicin, ery-thromycin and tetracycline), and enterococciagainst penicillin, ampicillin, gentamicin, ery-thromycin and tetracycline. The medium usedwas ... were streaked in a line from the edge of the plate towards the centre of the peni-cillin disk. When the investigated strain waspositive ß-lactamase producer, the indicatorstrain grew alongside ... treatment of bovine mastitis in Uruguay. Within this class, penicillin, amoxi-cillin, cloxacillin and ampicillin are the mostlyused agents. In the Nordic countries penicillinis used as the first-line...