1. Which of the following is false concerning Mycobacterium tuberculosis It has a very low infectious dose A...

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Biology

1. Which of the following is false concerningMycobacterium tuberculosis
It has a very low infectious dose
A large percentage of the world population is infected
Produces granulomas in affected tissues
A positive tuberculin test indicates past infection, currentinfection, or BCGÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â immunization.
All of the above are true.
2. Which of the following is false concerninginfection with Chlamydia trachomatis
Certain serovars cause lymphogranuloma venerum, a rare butserious STD.
It is an obligate intracellular pathogen transmitted bycontact.
It is the most common cause of bacterial STD & preventableblindness (trachoma
It has a complex life cycle with external elementary bodies andintracellular Â Â Â Â Â Â Â Â replicating reticulate bodies
All of the above are true.
3.
Results of antigen-antibody binding include all of the followingexcept
Opsonization.
Neutralization
Lysis (MAC) through activation of complement by antibody via allthree (Classical, Alternate, and Mannan Lectin Binding) pathways ofcomplement activation.
Agglutination
Antibody dependent cell-mediated cytotoxicity (ADCC )

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1 The answer is It has a very low infectious dose Explanation Mycobacterium tuberculosis is a pathogenic bacteria causing tuberculosis disease It needs high amounts of oxygen and usually infects lungs of the mammals It has very high pathogenic dose and spreads easily through droplets in air Therefore the sentence saying it has low See Answer

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1. Which of the following is false concerning Mycobacterium tuberculosis It has a very low infectious dose A...

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Biology

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		It has a very low infectious dose
		A large percentage of the world population is infected
		Produces granulomas in affected tissues
		A positive tuberculin test indicates past infection, currentinfection, or BCGÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â immunization.
		All of the above are true.

		Certain serovars cause lymphogranuloma venerum, a rare butserious STD.
		It is an obligate intracellular pathogen transmitted bycontact.
		It is the most common cause of bacterial STD & preventableblindness (trachoma
		It has a complex life cycle with external elementary bodies andintracellular Â Â Â Â Â Â Â Â replicating reticulate bodies
		All of the above are true.

		Opsonization.
		Neutralization
		Lysis (MAC) through activation of complement by antibody via allthree (Classical, Alternate, and Mannan Lectin Binding) pathways ofcomplement activation.
		Agglutination
		Antibody dependent cell-mediated cytotoxicity (ADCC )