Bacteriological assessments (Mean ±SE) in dairy heifers exposed to cold stress. A) Concerning animal groups. B) Concerning sampling times. G1=Heifers injected with tulathromycin, Gc=Control, TBC=Total bacterial counts, TEC=Total Enterobacteriaceae counts, Strept. C=Streptococcus counts.  

Microbiological parameters (Mean ±SE) in dairy heifers exposed to cold stress conditions concerning sampling times interactions. A) Total bacterial (TBC) and Enterobacteriaceae (TEC) counts. B) Streptococcus, Haemophilus, and Pasteurella counts.