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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Have Koch’s postulates been carried out for Lyme disease? Explain.

A 19-year-old woman presented because of the recent onset of breakthrough bleeding. She has been taking the same oral contraceptive Pill for two years, she has not forgotten any pills or had diarrhea or vomiting. She has been with her current sexual partner for four months and has recently stopped using condoms as additional protection. She is otherwise well. On examination the vulva and vagina are healthy and there is no inflammation. There is a small cervical ectropion and profuse mucus and pus discharge from the cervix. There is no tenderness on bimanual vaginal examination and no masses palpable. An endocervical swab and urine test was administered.

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