[1] NMSU Microbiol Lab, Las Cruces, NM USA
[2] New Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003 USA
[3] New Mexico State Univ, Las Cruces, NM 88003 USA
[4] New Mexico State Univ, Corona Range & Livestock Res Ctr, Las Cruces, NM 88003 USA
[5] NMSU Extens Vet, Las Cruces, NM USA