RESUMEN
The clinical signs of horses infected with equine influenza in two Queensland locations, Morgan Park Recreational Grounds at Warwick, and the western region of Brisbane, are described and compared. Clinical signs were observed to be more severe, and treatment more intensive, in horses in stressful settings.
Asunto(s)
Brotes de Enfermedades/veterinaria , Enfermedades de los Caballos/virología , Subtipo H3N8 del Virus de la Influenza A/aislamiento & purificación , Infecciones por Orthomyxoviridae/veterinaria , Crianza de Animales Domésticos/métodos , Animales , Enfermedades de los Caballos/fisiopatología , Caballos , Infecciones por Orthomyxoviridae/fisiopatología , Infecciones por Orthomyxoviridae/virología , Queensland , Estrés Fisiológico/fisiologíaRESUMEN
This report describes the clinical signs of equine influenza (EI) during an epidemic in a closed, predominantly immunologically naïve population of horses. It included 254 study horses, few of which exhibited all three signs of pyrexia, nasal discharge and cough simultaneously. We conclude that although the majority of affected horses exhibit temperature patterns resembling those most often described in the published literature, clinicians should be aware that other profiles are quite common.
Asunto(s)
Brotes de Enfermedades/veterinaria , Enfermedades de los Caballos/virología , Subtipo H3N8 del Virus de la Influenza A/aislamiento & purificación , Infecciones por Orthomyxoviridae/veterinaria , Animales , Anticuerpos Antivirales/sangre , Pruebas de Inhibición de Hemaglutinación/veterinaria , Enfermedades de los Caballos/diagnóstico , Enfermedades de los Caballos/inmunología , Caballos , Subtipo H3N8 del Virus de la Influenza A/genética , Estudios Longitudinales , Infecciones por Orthomyxoviridae/sangre , Infecciones por Orthomyxoviridae/inmunología , Infecciones por Orthomyxoviridae/virología , Queensland , ARN Viral/química , ARN Viral/genética , Estudios Retrospectivos , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa/veterinariaRESUMEN
The risk of individuals becoming infected during an epidemic of infectious disease can vary as the disease progresses. Monitoring this risk may provide information about the dynamics of transmission. This study describes the epidemic curve for an epidemic of equine influenza (EI) in a closed population of horses predominantly immunologically naïve to EI at a 3-day event at Morgan Park in southern Queensland, Australia. The hazard function suggested that a subset of horses were at reduced risk of becoming infected. This highlights the importance, when modelling infectious disease in populations, of considering possible differences in the risk of infection among subgroups in the population.