"Walker" zombie bites do not kill because of the zombie virus, but rather the unsanitary nature of their mouths due to diet and decomposition, with scratches causing similar infections for similar reasons. Their saliva often contains several septic pathogens, specifically the bacteria: E. coli,Staphylococcus sp., Providencia sp., Proteus morgani, P. mirabilis. and Pasteurella multocida. The rapid growth of these bacteria tends to cause extremely virulent strains that are highly resistant to antibiotics, and most often lethal.