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Multiple Choice

Thrush is associated with dirt and manure packed into the hoof containing which organism?

Thrush in the horse’s hoof comes from anaerobic bacteria thriving in dirty, moisture-filled environments like the frog sulci where manure can get packed in. The main organism responsible is Fusobacterium necrophorum, a hardy anaerobe that lives in manure and soil and can invade and destroy frog tissue when conditions are right. Its growth in the damp, dirty hoof leads to tissue necrosis and the characteristic foul odor. Candida albicans is a yeast more associated with mucosal infections (mouth, vagina) in various species, not the hoof disease thrush. Escherichia coli is a gut bacterium that can be found in the environment but isn’t the typical cause of equine thrush. Streptococcus pneumoniae is a respiratory pathogen in humans and isn’t linked to hoof infections in horses.

Thrush in the horse’s hoof comes from anaerobic bacteria thriving in dirty, moisture-filled environments like the frog sulci where manure can get packed in. The main organism responsible is Fusobacterium necrophorum, a hardy anaerobe that lives in manure and soil and can invade and destroy frog tissue when conditions are right. Its growth in the damp, dirty hoof leads to tissue necrosis and the characteristic foul odor.

Candida albicans is a yeast more associated with mucosal infections (mouth, vagina) in various species, not the hoof disease thrush. Escherichia coli is a gut bacterium that can be found in the environment but isn’t the typical cause of equine thrush. Streptococcus pneumoniae is a respiratory pathogen in humans and isn’t linked to hoof infections in horses.