Generally, neutrophil counts may be high after bacterial infections; they may also decrease after certain bacterial and viral infections, so it is important to consult a doctor if you suspect an infection.
Neutrophils are one of the most common types of white blood cells, and the normal neutrophil ratio is about 50% to 70%, which may vary from laboratory to laboratory. Neutrophils are elevated in humans with bacterial infections such as Staphylococcus aureus, hemolytic streptococcus, and Streptococcus pneumoniae.
Elevated neutrophils are more common in bacterial infections. However, in certain extremely severe purulent bacterial infections, chickenpox, rubella, and cytomegalovirus infections, the total number of white blood cells is reduced instead of being elevated.
It is advisable to seek prompt medical attention for abnormal neutrophil levels or if you suspect a bacterial or viral infection.