To compare: The five major classes of infectious agents. Concept introduction: Infectious organisms are the harmful agents that are capable of causing damage or death to the organism that they invade. These organisms are termed as pathogenic organisms as they cause harmful effects in the host system. There are five major classes of infectious agents that cause diseases in the humans, including bacteria, virus, fungi , protozoan, and multicellular parasites .

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 22.1, Problem 1LO

Summary Introduction

To compare: The five major classes of infectious agents.

Concept introduction: Infectious organisms are the harmful agents that are capable of causing damage or death to the organism that they invade. These organisms are termed as pathogenic organisms as they cause harmful effects in the host system. There are five major classes of infectious agents that cause diseases in the humans, including bacteria, virus, fungi, protozoan, and multicellular parasites.

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Answer 2

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 22.1, Problem 1LO

Summary Introduction

To compare: The five major classes of infectious agents.

Concept introduction: Infectious organisms are the harmful agents that are capable of causing damage or death to the organism that they invade. These organisms are termed as pathogenic organisms as they cause harmful effects in the host system. There are five major classes of infectious agents that cause diseases in the humans, including bacteria, virus, fungi, protozoan, and multicellular parasites.

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Answer 3

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 22.1, Problem 1LO

Summary Introduction

To compare: The five major classes of infectious agents.

Concept introduction: Infectious organisms are the harmful agents that are capable of causing damage or death to the organism that they invade. These organisms are termed as pathogenic organisms as they cause harmful effects in the host system. There are five major classes of infectious agents that cause diseases in the humans, including bacteria, virus, fungi, protozoan, and multicellular parasites.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 22.1, Problem 1LO

Summary Introduction