| blackhead disease: reduced sensitivity of histomonas meleagridis to nitarsone in vitro and in vivo. | histomonas meleagridis, a flagellated protozoan parasite, is the causative agent of blackhead disease or histomoniasis in gallinaceous birds. currently nitarsone (4-nitrophenylarsonic acid) is the only approved preventative drug available in the united states against blackhead disease. initially we tested the sensitivity of three different isolates of h. meleagridis collected from outbreaks in north carolina (strain mnc), michigan (strain zm), and georgia (strain bg) to nitarsone using in vitro ... | 2014 | 24758114 |