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This condition can be caused by certain medications and by infections. In some cases, it is caused by a cancer or precancerous condition. Myelofibrosis, bone marrow scarring that can result from various hematologic cancers, typically leads to low blood counts. Pancytopenia can also be caused by aplastic anemia, a bone marrow failure disorder that affects blood cell production.
White blood cells (WBC) are the soldiers of your kitty's immune system, so a low count means the army is low on manpower. These squiggly leukocytes fight infections head-on and sometimes there are casualties. The reason for a low WBC count can be revealed by a blood screening. General Infection While white blood cell count is often discussed in the context of serious illnesses like cancer or immune-deficiency disorders, a low count doesn't always indicate a fatal disease. In fact, pretty much any infection or inflammation causes a drop in WBC count. The cells are attracted to damaged tissue and pathogens.