antibacterials may prevent the horse developing a protective
immune response.
Inflammatory lower airway disease with secondary bacterial
infection by a variety of bacterial species such as Streptococcus
equi subspecies zooepidemicus, Pasteurella spp.,
and Bordetella bronchiseptica is common following viral
infections. Primary infections with these bacteria and Streptococcus
pneumoniae and Mycoplasma spp. may also occur
in young Throughbreds in race training. Treatment with
broad-spectrum antibacterials is helpful in these cases,
which may also benefit from the administration of mucolytics
and bronchodilators.