Asunto(s)
Infecciones por Haemophilus/veterinaria , Haemophilus/aislamiento & purificación , Miositis/veterinaria , Enfermedades de los Porcinos/microbiología , Enfermedad Aguda , Animales , Femenino , Infecciones por Haemophilus/microbiología , Infecciones por Haemophilus/patología , Miositis/microbiología , Miositis/patología , Organismos Libres de Patógenos Específicos , Porcinos , Enfermedades de los Porcinos/patologíaAsunto(s)
Diarrea/veterinaria , Enfermedades de los Porcinos/microbiología , Animales , Animales Recién Nacidos , Antibacterianos/uso terapéutico , Diarrea/diagnóstico , Diarrea/tratamiento farmacológico , Diarrea/microbiología , Diarrea/parasitología , Gastroenteritis Porcina Transmisible/diagnóstico , Gastroenteritis Porcina Transmisible/tratamiento farmacológico , Porcinos , Enfermedades de los Porcinos/diagnóstico , Enfermedades de los Porcinos/tratamiento farmacológico , Enfermedades de los Porcinos/parasitologíaRESUMEN
Influence of atrophic rhinitis (AR) on mean daily weight gain (MDG) was studied in hogs randomly selected from 7 farrow-to-finish herds in Illinois. Herds were selected to obtain a wide range of clinical signs and lesions of the disease; thus, prevalence of clinical signs of AR in finishing hogs ranged from 0% to 20% among herds, and in hogs examined at slaughter the proportion of hogs with turbinate lesions ranged from 5% to 92%. None of the herds investigated had any obvious problems with pneumonia; nevertheless, hogs with moderate to severe pneumonic lesions were excluded from the study, to minimize any combined effect of AR and pneumonia. In 3 herds, MDG in AR-free pigs was 15% to 18% better than in pigs with severe AR lesions. Prevalence of clinical signs ranged from 5% to 20%, and of turbinate lesions, from 66% to 92%. In 4 herds in which MDG appeared to be unaffected by AR, prevalence of clinical signs of the disease ranged from 0% to 5%, and of turbinate lesions, from 5% to 74%. No consistent pattern of influence on AR lesions was found for bacterial infections, as determined by culturing of nasal swab specimens on MacConkey agar and blood agar.