[Etiologic and pathologic study of respiratory disease in lambs from intensive breeding facilities in southern Spain].

Between 1991 and 1993, it was observed epidemiologically that respiratory disturbances in lambs are associated with high temperatures during the summer. The etiological agent isolated is principally Mycoplasma ovipneumoniae; moreover, Actinobacillus pleuropneumoniae biovar A has been isolated in a high number of samples. Histopathologically, an interstitial bronchopneumonia was the main lesional finding; this lesion is associated with previous mycoplasma infection.