Based on clinical presentation and culture results of tracheal fluid, the mare was diagnosed with bacterial bronchopneumonia secondary to equine influenza.
The equine influenza virus (EIV) identified in the imported mare displayed 99.1% nucleotide homology of the HA1 gene to the prototype Florida sublineage clade 2 isolate A/equine/Richmond/1/2007 (H3N8).
This case illustrates the risk of introducing a clade 2 EIV in North America.
Source: Pusterla, N., Estell, K., Mapes, S. and Wademan, C. (2014), Detection of clade 2 equine influenza virus in an adult horse recently imported to the USA. Equine Veterinary Education, 26: 453–455. doi: 10.1111/eve.12159
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