RESULTS OF TREATMENT WITH CHLORTETRACYCLI N MEDICATED FEED IN CHRONICAL PNEUMONIC PIGS

26 fattening pigs with spontaneous severe chronic bronchopneumonitis w ere orally treated with fead containing 800 ppm chlortetracycline (CTC ) over 3 weeks. With the help of clinical investigation, transcutaneou s measurement of the oxygen-saturation of the blood, X-ray of the thor ax and bronchoalveolar lavage significant effects could be measured du ring and after finishing the treatment. In 19 spontaneous fallen ill u ntreated control animals recovery could not be detected by the used me thods. After the end of the 3 weeks interval there were significant di fferences between treated and untreated animals detectable. By this in vestigations practical observations that oral treatment with 800 ppm i n fattening pigs is effective was verified. But because of pharmacocin etic data higher concentrations would be recommendable. In the treated pigs a significant increase of the oxygen saturation of the blood occ urred not before the 8th day of treatment. This underlines the importa nce of sufficient length of the treatment interval.