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問題一覧
1
Microorganism that causes Whipple disease
Tropheryma whipplei
2
Cholera toxin is higher at __________
pH of 6.0 and temperature of 30 degrees Celsius
3
Multiplication of infectious agent within the body.
Infection
4
B. pertussi virulence genes gets enhanced with _______________
high concentration of magnesium sulfate or nicotinic acid
5
A microorganism that does not cause disease
Nonpathogen
6
Process whereby bacteria, animal parasites, fungi, and viruses enter host cells or tissues and spread in the body
Invasion
7
Diphtheria toxin is greatly enhanced when grown in medium with ____________
low iron
8
These are highly mobile segments of DNA
Transposons
9
The following are portals of entry of pathogenic bacteria except
Hair and Nails
10
An agent capable of causing disease only when the host's resistance is impaired
Opportunistic pathogen
11
Causes gastroenteritis and gas gangrene
Clostridium perfringens
12
Plasmid-encoded proteins of Y. pestis are expressed maximally at _________ (host temperature) and minimally at _________;(flea temperature).
35-37 degrees Celsius, 20-28 degrees Celsius
13
Process where DNA from one organism released into the environment and taken up by different organism
Transformation
14
The process by which bacteria stick to the surfaces of host cells.
Adherence
15
What is the mode of transmission of Bacillus anthracis
Raw hair from infected animals
16
Causes monocytic ehrlichiosis
Ehrlichia chaffeensis
17
The following are the microbes that cannot be grown in vitro but have animal models instead, except
Neisseria gonorrhoeae
18
Mode of transmission of Yersinia pestis
fleas
19
Cause of bubonic plague
Yersinia pestis
20
These are large organized group of genes that are usually 10-200 kb in size.
Pathogenecity Islands (PAIs)
21
The following are the common signals that control the expression of the virulence genes except
Water quality
22
Which of the following microorganism has no animal model but can be grown in vitro
Neisseria gonorrhoeae
23
A microorganism capable of causing disease
Pathogen
24
Causes tetanus
Clostridium tetani
25
Causes botulism
Clostridium botulinum
26
The ability of an infectious agent to cause disease
Pathogenecity
27
Causes bacillary angiomatosis
Bartonella henselae
28
A person or animal with asymptomatic infection that can be transmitted to another susceptible person or animal
Carrier
29
Yersinia enterolitica and Listeria monocytogenes become motile at 26 degrees Celsius and not at 37 degrees Celsius
False
30
Which of the following belong to the major properties of PAIs
Present in the genome of pathogenic members but absent in nonpathogenic members
31
Causes tuberculosis
Mycobacterium tuberculosis
32
Causes hantavirus pulmonary syndrome
Sin Nombre virus
33
Causes Kaposi sarcoma
Human Herpesvirus 8
34
Microbial flora harbored by normal, healthy individuals
Microbiota
35
He proposed a series of postulates that have been applied broadly to link many specific bacterial species with particular diseases.
Robert Koch
36
Protein toxins that activate the immune system by binding to major histocompatibility complex (MHC) molecules and T-cell receptors (TCR) and stimulate large numbers of T cells to produce massive quantities of cytokines
Superantigens
37
These are extra chromosomal pieces of DNA capable of replicating
Plasmids