Susceptibility of Pleuropneumonia-Like Organisms to the Action of the Antibiotics Erythromycin, Chlortetracycline, Hygromycin, Magnamycin, Oxytetracycline and Streptomycin

Characterization of Avian Mycoplasma

“…Crawley and Fahey (39) proposed a control program based on injecting chicken flocks with streptomycin prior to saving hatching eggs. Wong and James (178) reported that magnamycin was effective in their in ovo studies, as did Hamdy et al (90) who also mentioned the value of erythromycin. It is of interest to note that erythromycin and tylosin have been employed in egg dipping experiments by Levine and Fabricant (117).…”

Influence of Certain Improved Antibiotic Formulations Upon the Course of CRD in a Breeder Flock and Progeny

“…Certain antibiotics are effective against avian Mycoplasma infecting the embryo; the spectrum is similar to that reported in in vitro trials (Gross and Johnson, 1953;Hamdy et al, 1957;Wong and James, 1953;and Yamamoto and Adler, 1956). Effectiveness of antibiotic treatment of dams in reducing incidence of egg transmission has been reported (Adler et al, 1956;Crawley and Fahey, 1955;and Peterson, 1953).…”

“…Reports indicate that some antibiotics (notably magnamycin, the tetracycline compounds, streptomycin, dihydrostreptomycin and erythromycin) and furazolidone are effective in vitro against avian strains of Mycoplasma. There has been some disagreement as to the relative effectiveness of these products (Hamdy et al, 1957;and Yamamoto and Adler, 1956). Conversely, it is known that certain products which are widely used against bacterial disease are relatively ineffective against Mycoplasma; penicillin is a notable example (Domermuth and Johnson, 1955).…”

Characterization of avian Mycoplasma

“…Crawley and Fahey (39) proposed a control program based on injecting chicken flocks with streptomycin prior to saving hatching eggs. Wong and James (178) reported that magnamycin was effective in their in ovo studies, as did Hamdy et al (90) who also mentioned the value of erythromycin. (48) included furazolidone and several sulfa drugs in their in vitro studies.…”