Their frequency in the blood is decreased in a large variety of infectious diseases of either bacterial or viral origin. (science.institut-curie.org)
The value of such metaphors may be clearer for infectious diseases caused by single pathogens. (pennstatehealthnews.org)
Their saliva can contain all kinds of infectious agents including viruses, bacteria and parasites (heartworm disease, malaria, etc.) contracted from prior victims. (drnelsonsveterinaryblog.com)