For almost 100 years, cat scratches have been associated with illness in people.

Most people will not become very ill with this infection and usually gets better by itself over several months without any specific treatment. This infection can be more serious with people who have poor immune systems.

People who have HIV/AIDS or cancer patients using chemotherapy have poor immune system. This infection can prove fatal for HIV/AIDS patients if it is not treated properly.

This infection can create a condition known as bacillary angiomatosis. This is a condition of unusual increase of blood vessels that shape tumour-like stacks.

This condition can create complications of multiple organs including the brain, spleen, liver, lungs, and bone marrow.