While Haemobartonella species are common all over the world, in Turkey they are detected in cattle, mice, cats, and dogs. Haemobartonella propogate in blood by dividing into two. They are found on erythrocyte surfaces as rods composed of cocci next to each other. Rarely they are found free in plasma. Infections are usually unrecognized. Rarely they cause clinical disease. Splenectomy results in inflaming clinical symptoms but it also helps identification by helping easy visualization and increase in number. The Disease should be recognised in animals with anemia, enlarged spleen and animals with splenectomy. In general, parasites can be transported by Arthropoda while oral or parenteral routes are also possible. Tetracycline, oxytetracycline, chlortetracycline, neosalvarsan and aureomycine are very effective in the treatment.