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.

University of Notre Dame

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

Types of Disease Carriers

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.

OpenStax Microbiology Textbook

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.

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