How a proper application of Koch’s postulates would have prevented the misnaming of Haemophilus influenzae , which was named so because researchers isolated the organism from flu patients. Introduction : Haemophilus influenzae is an extremely small Gram negative parasitic bacterium, belonging to the Pasteurellaceae family, which requires heme in blood and NAD+ to thrive. It has virulence factors like polysaccharide capsule and K antigens that help it to cause infection. Even though it’s named so , H. influenzae do not cause flu, but it causes some fatal conditions in children like severe epiglottis, meningitis, and arthritis. Thus the name given to this bacterium is a misnomer, after it was named according to Koch’s postulates.

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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 20, Problem 11CT

Summary Introduction

To determine:

How a proper application of Koch’s postulates would have prevented the misnaming of Haemophilus influenzae, which was named so because researchers isolated the organism from flu patients.

Introduction:

Haemophilus influenzae is an extremely small Gram negative parasitic bacterium, belonging to the Pasteurellaceae family, which requires heme in blood and NAD+ to thrive. It has virulence factors like polysaccharide capsule and K antigens that help it to cause infection. Even though it’s named so, H. influenzae do not cause flu, but it causes some fatal conditions in children like severe epiglottis, meningitis, and arthritis. Thus the name given to this bacterium is a misnomer, after it was named according to Koch’s postulates.

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Which of these statements about Streptococcus pyogenes is false?a) It is a Gram-positive coccus occurring in chains.b) Some strains that infect wounds can cause toxic shock.c) Some strains that infect wounds can cause necrotizing fasciitis.d) It can cause puerperal fever.e) A vaccine is available for preventing S. pyogenes infections.

A suspected pathogen is observed from the blood of a diseased mouse. An investigation of the other mice in the area indicates that it is not present in healthy mice. With Koch's postulates in mind, what is the next step to determine whether or not this suspected pathogen is the cause of disease in the mouse? a) Grow the suspected pathogen in a pure culture Ob) Re-isolate the suspected pathogen and show that it is the same as the original pathogen c) Inoculate a healthy mouse with the suspected pathogen O d) Determine whether the organism in the pure culture is the same one as in the original sample

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 20, Problem 11CT

Summary Introduction

To determine:

How a proper application of Koch’s postulates would have prevented the misnaming of Haemophilus influenzae, which was named so because researchers isolated the organism from flu patients.

Introduction:

Haemophilus influenzae is an extremely small Gram negative parasitic bacterium, belonging to the Pasteurellaceae family, which requires heme in blood and NAD+ to thrive. It has virulence factors like polysaccharide capsule and K antigens that help it to cause infection. Even though it’s named so, H. influenzae do not cause flu, but it causes some fatal conditions in children like severe epiglottis, meningitis, and arthritis. Thus the name given to this bacterium is a misnomer, after it was named according to Koch’s postulates.

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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 20, Problem 11CT

Summary Introduction

To determine:

How a proper application of Koch’s postulates would have prevented the misnaming of Haemophilus influenzae, which was named so because researchers isolated the organism from flu patients.

Introduction:

Haemophilus influenzae is an extremely small Gram negative parasitic bacterium, belonging to the Pasteurellaceae family, which requires heme in blood and NAD+ to thrive. It has virulence factors like polysaccharide capsule and K antigens that help it to cause infection. Even though it’s named so, H. influenzae do not cause flu, but it causes some fatal conditions in children like severe epiglottis, meningitis, and arthritis. Thus the name given to this bacterium is a misnomer, after it was named according to Koch’s postulates.

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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 20, Problem 11CT

Summary Introduction