A portal of entry is an anatomic site through which pathogens can pass into host tissue.

Austin Community College

An encounter with a potential pathogen is known as exposure or contact. The food we eat and the objects we touch are ways that we can be exposed to potential pathogens. For a pathogen to cause disease, it needs to be able to gain access into host tissue. An anatomic site through which pathogens can pass into host tissue is called a portal of entry. 

Exposure

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Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

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Portal of Entry

Pathogens can also enter through a breach in the protective barriers of the skin and mucous membranes. The skin is a natural barrier to pathogens, but breaks in the skin like wounds, insect bites, or needle pricks, can provide a parenteral portal of entry for microorganisms.

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