In the term panleukopenia, what does the prefix "pan" signify?

The prefix "pan" in the term "panleukopenia" signifies "all." This term is used in a medical context to describe a condition characterized by a widespread reduction in the number of leukocytes (white blood cells) in the blood. Specifically, when "pan" is used as a prefix, it indicates that the condition affects all types of leukocytes, hence the complete decrease in white blood cells. This is essential for understanding the severity of the condition, as panleukopenia is commonly associated with certain viral infections, such as feline panleukopenia, where the reduction in white blood cells can lead to significant immunocompromise in affected animals. This understanding is critical for veterinary technicians when assessing and treating patients with this condition.