A carrier not infected but contaminated by a pathogen and can transmit it. Example: a healthcare worker who forgets to wash their hands and trasnmits an infection

Passive Carrier

An infected carrier that can transmit pathogens and may or may not show signs of infection.

Active Carrier

An active carrier that does not show signs of infection. Example: "Typhiod Mary", or Mary Mallon, was a cook that unknowingly had and transmitted typhoid fever to her clients.

Asymptomatic Carrier

Types of disease carriers include:
- Passive carrier
- Active carrier
- Asymptomatic carrier

University of Notre Dame

A reservoir (i.e. a human) capable of pathogen transmission without itself displaying symptoms

Carrier

OpenStax Concepts of Biology provides the necessary breadth and depth for core Biology concepts.

Link: https://openstax.org/details/books/concepts-biology/

OpenStax Biology 2nd Edition

https://openstax.org/details/books/microbiology/

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.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

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