Streptococcus equi subsp. zooepidemicus

Causative agent Streptococcus equi subsp. zooepidemicus
Can infect the respiratory tract (nasal cavity, paranasal sinuses, trachea and bronchi/bronchioles)
URT infection can be indistinguishable clinically from Strangles, but does not cause suppurative lymphadenitis (cf: S.equi subsp. equi)