Identification, HPG2 Sequence Analysis, and Antimicrobial Susceptibility of Isolates Obtained from Outbreaks of Infectious Coryza in Commercial Layers in Sonora State, Mexico.

This is the first extensive report on the identification and characterization of (AVP) isolates obtained from outbreaks of infectious coryza (IC) in IC-vaccinated layer flocks from Sonora State in Mexico. Isolates obtained from IC outbreaks during the years 2007, 2014, 2015, 2017, and 2019 were identified by conventional PCR test and 16S rRNA gene analysis, serotyped by Page serotyping and genotyped by the recently described partial sequence analysis of the HPG2 region. Furthermore, antimicrobial susceptibility profiles were determined by a recently improved minimal inhibitory concentration (MIC) test.