Cat Hemoplasma Infection: Welfare and Transmission

Feline hemoplasma bacteria infect red blood cells causing anemia with welfare implications particularly in immunocompromised cats.

Key Facts

Mycoplasma haemofelis is the most pathogenic feline hemoplasma causing severe hemolytic anemia
Transmission routes include flea bites, cat bites, and blood transfusion
Carrier cats may be asymptomatic for years before stress or illness triggers acute hemolytic crisis
FeLV and FIV positive cats are at much higher risk of severe clinical disease from hemoplasma infection
Doxycycline is the treatment of choice with supportive care including blood transfusion for severe anemia

Welfare Considerations

Cats with acute hemoplasma-associated anemia experience the profound fatigue, weakness, and dyspnea characteristic of severe anemia. Pale mucous membranes, lethargy, and loss of appetite indicate significant welfare compromise. Cats requiring blood transfusion face the additional stress of hospitalization and procedures. Asymptomatic carrier cats represent a welfare concern because they face unpredictable acute decompensation during illness or stress events without prior recognition of infection. Flea control is critical to preventing transmission as this represents the most common infection route in outdoor and multi-cat households.

What You Can Do

Maintain year-round flea prevention to reduce hemoplasma transmission risk between cats
Test multi-cat households for hemoplasma if anemia is identified in one cat
Seek immediate veterinary care for cats showing sudden lethargy, pale gums, or breathing difficulty
Discuss screening of blood donor cats for hemoplasma before transfusions