作者: G.S. Cottew , J.R. Etheridge , L.C. Lloyd
DOI: 10.1111/J.1751-0813.1979.TB15854.X
关键词:
摘要: … SUMMARY: Pigs aged 6 to 9 weeks from enzootic pneumonia-free herds were inoculated intranasally with a suspension of pneumonic lung containing Mycoplasma hyopneumoniae or …