Understanding Nosocomial Infections: Types, Factors, and Prevention

Transitory and Resident Flora

Transitory flora: Microorganisms that colonize the upper layers of the skin, acquired by direct contact. They are the most frequent microorganisms in nosocomial infections and are easily removed with handwashing.

Resident flora: Microorganisms that reside in the deeper layers of the skin. They are more difficult to remove with handwashing and are less related to nosocomial infections.

Surgical Wound Classification

  • Clean: Wounds not originating from the airway, gastrointestinal
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Protozoan Parasites: Characteristics, Diseases, and Prevention

Protozoa: An Introduction

Protozoa are unicellular organisms. Some may be parasitic. They have core mitochondria, are eukaryotic, feed by phagocytosis, and reproduce by bipartition. Their vegetative form is the infective trophozoite cyst.

Entamoeba histolytica

Kingdom: Protista. Family: Entamoebidae. Genus: Entamoeba. Species: Entamoeba histolytica. It is an anaerobic eukaryotic parasite that lives in the lumen and the wall of the intestine. Its reservoir is humans only. It is found in three forms:

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