Viral Infections Certain viral infections can cause cytopathic changes in blood cells or changes in the maturation of blood cells. The nuclear or cytoplasmic inclusions of some viruses, particularly the herpesviruses, are visible by light microscopy. The most easily identified…
Introduction Parasitic infections remain an important cause of pulmonary disease throughout the world, although less frequently encountered in resource-rich countries. The most common protozoal parasite–associated lung diseases throughout the world are caused by Plasmodium falciparum (falciparum malaria) and Toxoplasma gondii…
Introduction Helminthic infections comprise a great variety of worms that parasitize virtually every organ in the human body. Although helminthic infections occur throughout the world, they are more common in the subtropics and tropics. This is usually related to climatic…