Rickettsia is Gram negative, non spore forming bacteria. They are obligate parasite that lives inside host cell. Rickettsia species synthesized less amount of peptidoglycan and hence, appear as cell wall less organisms. Rickettsia was first identified by scientists named Howard Ricketts. He identified that Rickettsia bacterium was transmitted through tick vectors.

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Answer 1

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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 21, Problem 3MC

Summary Introduction

Introduction:

Rickettsia is Gram negative, non spore forming bacteria. They are obligate parasite that lives inside host cell. Rickettsia species synthesized less amount of peptidoglycan and hence, appear as cell wall less organisms. Rickettsia was first identified by scientists named Howard Ricketts. He identified that Rickettsia bacterium was transmitted through tick vectors.

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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 21, Problem 3MC

Summary Introduction

Introduction:

Rickettsia is Gram negative, non spore forming bacteria. They are obligate parasite that lives inside host cell. Rickettsia species synthesized less amount of peptidoglycan and hence, appear as cell wall less organisms. Rickettsia was first identified by scientists named Howard Ricketts. He identified that Rickettsia bacterium was transmitted through tick vectors.

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Answer 3

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 21, Problem 3MC

Summary Introduction

Introduction:

Rickettsia is Gram negative, non spore forming bacteria. They are obligate parasite that lives inside host cell. Rickettsia species synthesized less amount of peptidoglycan and hence, appear as cell wall less organisms. Rickettsia was first identified by scientists named Howard Ricketts. He identified that Rickettsia bacterium was transmitted through tick vectors.

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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 21, Problem 3MC

Summary Introduction