Which type of leukocyte primarily defends against fungal or bacterial infections?

Neutrophils are a type of white blood cell that play a crucial role in the immune response, particularly in defending the body against fungal and bacterial infections. They are the most abundant type of granulocytes and are often the first responders to sites of infection or inflammation. Their primary function involves the ingestion and destruction of pathogens through a process called phagocytosis.

When a bacterial or fungal infection occurs, neutrophils are quickly recruited to the site of infection where they engage in attacking and eliminating the invaders. They are equipped with enzymes and antimicrobial substances that help to neutralize and digest the pathogens. Additionally, neutrophils can produce reactive oxygen species that aid in killing microbes.

The other types of leukocytes mentioned have different functions. Eosinophils, for example, are primarily involved in combating multicellular parasites and are also associated with allergic responses. Basophils play a role in inflammatory reactions and the release of histamine, which is important for allergy-related responses but not specifically for fighting infections. Lymphocytes, while critical for the adaptive immune response, are more involved in targeting specific pathogens through antibody production and cell-mediated immunity rather than immediate responses to infections.

Therefore, neutrophils are the primary leukocytes responsible for the initial