Mycoplasma haemofelis (formerly Haemobartonella felis) is an epicellular bacterial parasite that infects feline erythrocytes and can cause hemolytic anemia. It is the most pathogenic of the three feline haemoplasma species.
Infections caused by Candidatus Mycoplasma haemominutum and Candidatus Mycoplasma turicensis are less pathogenic but can still lead to disease, particularly in immunocompromised cats or those with concurrent illnesses.