Micro II - Quiz 2 - Mod 2 - Assignment Essays

Q: What two organisms are associated with urogenital tract infections but have also been isolated from asymptomatic individuals?

a. Mycoplasma hominis and Ureaplasma urealyticum

Q: What is the antigen used in the purified protein derivative (PPD) skin test?

c.A purified protein from the cell wall of M. tuberculosis

Q: The most common nontuberculosis mycobacterium (NTM) infecting humans

d. M. avium-intracellulare complex.

question

A 10B broth inoculated with vaginal material turns alkaline after overnight incubation at 35C. Which of the following organisms should you suspect?

answer

b.M. hominis

question

What is the most sensitive and rapid primary isolation liquid media for Mycobacterium spp.?

answer

d.Middlebrook 7H12

question

All of these stains are commonly used to visualize mycobacteria on a smear, except

answer

d.acridine orange.

question

Diseases caused by rickettsial organisms are typically transmitted to humans by

answer

b.an arthropod vector.

question

What organism causes endemic typhus?

answer

a.Rickettsia typhi

question

What two organisms are associated with urogenital tract infections but have also been isolated from asymptomatic individuals?

answer

a.Mycoplasma hominis and Ureaplasma urealyticum

question

What is the antigen used in the purified protein derivative (PPD) skin test?

answer

c.A purified protein from the cell wall of M. tuberculosis

question

All the following antimicrobial agents are used to treat mycoplasma infections, except

answer

d.penicillin.

question

All of the following are biochemical tests for the identification of Mycobacterium spp., except

answer

a.gelatin liquefaction.

question

The most common nontuberculosis mycobacterium (NTM) infecting humans

answer

d.M. avium-intracellulare complex.

question

Chlamydia trachomatis is the infectious agent in all the following conditions in humans, except

answer

d.pharyngitis.

question

When transporting specimens for Mycoplasma culture to the laboratory, extreme care must be taken so that the specimen does not

answer

d.All of the above

question

Which factor is added to media to provide cholesterol for mycoplasma-like organisms?

answer

b.20% fetal calf serum

question

If a person has had TB during his or her lifetime, how likely is it that the person will get the disease again?

answer

a.5% to 15%

question

This disease is slowly progressive, malignant, and, if untreated, life threatening. It is characterized by skin lesions and progressive, symmetric nerve damage. Lesions of the mucous membranes of the nose may lead to destruction of the cartilaginous septum, resulting in nasal and facial deformities. What disease is this?

answer

a.Hansen disease

question

All of the following are urogenital infections in men, produced by Chlamydia trachomatis,except

answer

b.orchitis.

question

What component of mycobacteria is used for identification in nucleic acid hybridization assays?

answer

b.Ribosomal RNA

question

The Centers for Disease Control and Prevention (CDC) recommends all the following drugs for the treatment of Mycobacterium tuberculosis,except

answer

d.ciprofloxacin.

question

What testing method is the method of choice for detecting antibodies to Chlamydophila pneumoniae?

answer

b.Microimmunofluorescence

question

Mycoplasma organisms will grow in which of the following atmospheres?

answer

d.All of the above

question

A 4-day-old infant shows symptoms of conjunctivitis. A Giemsa stain of the conjunctival scraping shows perinuclear cytoplasmic inclusions. This organism is most likely

answer

C. trachomatis serovars D-K.

question

Which of the following organisms was once called "T-strain mycoplasma"?

answer

a.Ureaplasma spp.

question

What has an outer membrane similar to that of many gram-negative bacteria, with the most prominent feature being the major outer membrane protein?

answer

c.EB

question

Mycoplasma spp. from patient samples are visible by which staining technique?

answer

c.Acridine orange

question

What disease, caused by Chlamydia trachomatis, is considered a sexually transmitted disease where the organisms enter the lymph nodes near the genital tract, resulting in bubo formation and ultimately rupturing the lymph node?

answer

a.LGV

question

When Mycoplasma hominis invades the upper genitourinary tract, it can cause the following:

answer

d.All of the above

question

How long does it take to detect most Mycobacterium spp. with the BACTEC method?

answer

a.Less than 2 weeks

question

What time frame is suitable for blood draws for serologic testing to diagnose Mycoplasma infections?

answer

a.Onset of symptoms and 2 to 3 weeks later

question

When designing a mycobacterial laboratory, the designers should include all the following engineering controls to keep the workers safe, except

answer

c.positive air pressure.

question

Fifty years after his release from a concentration camp, a man develops signs and symptoms of typhus. He currently has no known contacts or source of disease exposure; however, he may have had it in 1945 when he experienced similar symptoms. What is the most likely current diagnosis?

answer

d.Brill-Zinsser syndrome

question

What infectious agent causes the condition primary atypical pneumonia?

answer

d.M. pneumoniae

question

All of the following are traditional characteristics used to identify mycobacteria, except

answer

c.Gram stain results.

question

What test method is the most commonly used to detect antibodies to Mycoplasma spp.?

answer

b.Enzyme immunoassay (EIA)

question

A microbiologist notices growth on a LJ slant that is a buff color, rough, and seems arranged in a cord. It has taken these organisms 4 weeks to grow. What is the most probable organism?

answer

M. tuberculosis

question

If a newborn has symptoms of meningitis but the cerebrospinal fluid (CSF) is negative for both Gram stain and a routine culture, what organisms should be suspected?

answer

c.Mycoplasma hominis and Ureaplasma urealyticum

question

Middlebrook 7H10 and 7H11 media are enriched with all of the following, except

answer

c.heme.

question

Which of the following methods is used to determine the presence of growth in mycoplasma broth media?

answer

c.
Change in phenol red pH indicator

question

What are photochromogens?

answer

a.Species that produce carotene pigment upon exposure to light

question

Why are antibody detection methods for Chlamydia trachomatis infection severely limited in the knowledge they provide the physician?

answer

c.Many people have antibodies from previous infections, and local infections do not cause great increases in antibody levels.

question

How are mycobacterial infections typically transmitted?

answer

d.By air

question

What is the recommended contact time for most disinfectants in a mycobacteriology laboratory?

answer

b.10 to 30 minutes

question

Infants can contract all the following chlamydial infections when passing through the birth canal, except

answer

d.endocarditis.

question

What are scotochromogens?

answer

b.Species that produce pigment in the light or the dark

question

What disease does Chlamydophila psittaci cause in humans?

answer

c.Parrot fever

question

What is the name of the test used to detect rickettsial agents?

answer

c.Weil-Felix

question

At-risk groups for contracting walking pneumonia include all the following, except

answer

d.preschool children.

question

What organism causes epidemic louseborne typhus?

answer

d.R. prowazekii

question

One of the factors that allows Mycoplasma to infect the respiratory tract and the urogenital tract is that

answer

c.they adhere to the epithelium of mucosal surfaces and are not eliminated by mucus secretions.

question

Chlamydia trachomatis produces all the following conditions in adult women, except

answer

c.bacterial vaginosis

question

All of the following diseases are associated with Chlamydia trachomatis,except

answer

a.undulant fever.

question

All of the following are biochemical tests for the identification of Mycobacterium spp., except

answer

d.PYR.

question

Which of the following stains is used to enhance the visibility of mycoplasma-like colonies?

answer

c.Dienes stain

question

What organisms are considered obligate intracellular parasites?

answer

a.Chlamydia

question

Mycoplasmas are different from most other bacteria because they do not have a _____.

answer

a.cell wall

question

An invasive genital disease associated with buboes in the groin describes an infection caused by

answer

d.Chlamydia trachomatis.

question

What constituent of LJ medium is added to suppress the growth of gram-positive bacteria?

answer

b.Malachite green

question

A sputum culture from a patient in Texas has buff colored colonies growing in approximately 4 weeks. After exposure to light, the colonies turn intense yellow. This isolate is most likely

answer

b.M. kansasii.

question

What organism causes human monocytic ehrlichiosis (HME) and uses the lone star tick (Amblyomma americanum) as its primary vector?

answer

b.Ehrlichia chaffeensis

question

What organism's unique life cycle contains an elementary body (EB) and a reticulate body (RB)?

answer

b.Chlamydia

question

What organism causes Rocky Mountain spotted fever?

answer

d.R. rickettsii

question

What medium is recommended for the recovery of Mycobacterium haemophilum?

answer

b.Chocolate

question

What Mycobacterium spp. fails to grow in vitro?

answer

b.M. leprae

question

What is the optimum culture incubation time for most mycobacteria associated with human disease?

answer

a.2 to 6 weeks

question

What is the preferred technique to rapidly detect Chlamydia trachomatis in clinical specimens?

answer

b.Nucleic acid amplification test (NAAT)

question

Cultures for Mycoplasma pneumoniae should be incubated for _____.

answer

d.21 days or more

question

What method is used to confirm a positive Chlamydia trachomatis EIA?

answer

d.NAAT

question

What organism has been recovered in normal, sexually active females but is also associated with chorioamnionitis, congenital pneumonia, and development of chronic lung disease in premature infants?

answer

b.Ureaplasma ureolyticus

question

What are nonchromogens?

answer

c.Species whose colonies remain buff colored after exposure to light

question

How has the treatment of mycobacterial disease changed in light of the multidrug-resistant strains ofmycobacteria that are being isolated?

answer

c.Combinations of three or four drugs are used instead of a single drug.

question

A young man goes to his physician complaining of a discharge from his penis. The physician collects a slide for Gram stain and a swab for culture and sends them to the laboratory. The Gram stain reveals greater than 25 white blood cells/high-power field, no bacteria seen. The culture results after 48 hours show no growth. What is the most probable diagnosis and the organism responsible?

answer

d.Nongonococcal urethritis, Chlamydia trachomatis

question

What classifies an organism as a multidrug-resistant Mycobacterium tuberculosis?

answer

a.Resistance to at least isoniazid and rifampin

1 of 71

question

A 10B broth inoculated with vaginal material turns alkaline after overnight incubation at 35C. Which of the following organisms should you suspect?

answer

b.M. hominis

question

What is the most sensitive and rapid primary isolation liquid media for Mycobacterium spp.?

answer

d.Middlebrook 7H12

question

All of these stains are commonly used to visualize mycobacteria on a smear, except

answer

d.acridine orange.

question

Diseases caused by rickettsial organisms are typically transmitted to humans by

answer

b.an arthropod vector.

question

What organism causes endemic typhus?

answer

a.Rickettsia typhi

question

What two organisms are associated with urogenital tract infections but have also been isolated from asymptomatic individuals?

answer

a.Mycoplasma hominis and Ureaplasma urealyticum

question

What is the antigen used in the purified protein derivative (PPD) skin test?

answer

c.A purified protein from the cell wall of M. tuberculosis

question

All the following antimicrobial agents are used to treat mycoplasma infections, except

answer

d.penicillin.

question

All of the following are biochemical tests for the identification of Mycobacterium spp., except

answer

a.gelatin liquefaction.

question

The most common nontuberculosis mycobacterium (NTM) infecting humans

answer

d.M. avium-intracellulare complex.

question

Chlamydia trachomatis is the infectious agent in all the following conditions in humans, except

answer

d.pharyngitis.

question

When transporting specimens for Mycoplasma culture to the laboratory, extreme care must be taken so that the specimen does not

answer

d.All of the above

question

Which factor is added to media to provide cholesterol for mycoplasma-like organisms?

answer

b.20% fetal calf serum

question

If a person has had TB during his or her lifetime, how likely is it that the person will get the disease again?

answer

a.5% to 15%

question

answer

a.Hansen disease

question

All of the following are urogenital infections in men, produced by Chlamydia trachomatis,except

answer

b.orchitis.

question

What component of mycobacteria is used for identification in nucleic acid hybridization assays?

answer

b.Ribosomal RNA

question

The Centers for Disease Control and Prevention (CDC) recommends all the following drugs for the treatment of Mycobacterium tuberculosis,except

answer

d.ciprofloxacin.

question

What testing method is the method of choice for detecting antibodies to Chlamydophila pneumoniae?

answer

b.Microimmunofluorescence

question

Mycoplasma organisms will grow in which of the following atmospheres?

answer

d.All of the above

question

A 4-day-old infant shows symptoms of conjunctivitis. A Giemsa stain of the conjunctival scraping shows perinuclear cytoplasmic inclusions. This organism is most likely

answer

C. trachomatis serovars D-K.

question

Which of the following organisms was once called "T-strain mycoplasma"?

answer

a.Ureaplasma spp.

question

What has an outer membrane similar to that of many gram-negative bacteria, with the most prominent feature being the major outer membrane protein?

answer

c.EB

question

Mycoplasma spp. from patient samples are visible by which staining technique?

answer

c.Acridine orange

question

answer

a.LGV

question

When Mycoplasma hominis invades the upper genitourinary tract, it can cause the following:

answer

d.All of the above

question

How long does it take to detect most Mycobacterium spp. with the BACTEC method?

answer

a.Less than 2 weeks

question

What time frame is suitable for blood draws for serologic testing to diagnose Mycoplasma infections?

answer

a.Onset of symptoms and 2 to 3 weeks later

question

When designing a mycobacterial laboratory, the designers should include all the following engineering controls to keep the workers safe, except

answer

c.positive air pressure.

question

answer

d.Brill-Zinsser syndrome

question

What infectious agent causes the condition primary atypical pneumonia?

answer

d.M. pneumoniae

question

All of the following are traditional characteristics used to identify mycobacteria, except

answer

c.Gram stain results.

question

What test method is the most commonly used to detect antibodies to Mycoplasma spp.?

answer

b.Enzyme immunoassay (EIA)

question

A microbiologist notices growth on a LJ slant that is a buff color, rough, and seems arranged in a cord. It has taken these organisms 4 weeks to grow. What is the most probable organism?

answer

M. tuberculosis

question

If a newborn has symptoms of meningitis but the cerebrospinal fluid (CSF) is negative for both Gram stain and a routine culture, what organisms should be suspected?

answer

c.Mycoplasma hominis and Ureaplasma urealyticum

question

Middlebrook 7H10 and 7H11 media are enriched with all of the following, except

answer

c.heme.

question

Which of the following methods is used to determine the presence of growth in mycoplasma broth media?

answer

c.
Change in phenol red pH indicator

question

What are photochromogens?

answer

a.Species that produce carotene pigment upon exposure to light

question

Why are antibody detection methods for Chlamydia trachomatis infection severely limited in the knowledge they provide the physician?

answer

c.Many people have antibodies from previous infections, and local infections do not cause great increases in antibody levels.

question

How are mycobacterial infections typically transmitted?

answer

d.By air

question

What is the recommended contact time for most disinfectants in a mycobacteriology laboratory?

answer

b.10 to 30 minutes

question

Infants can contract all the following chlamydial infections when passing through the birth canal, except

answer

d.endocarditis.

question

What are scotochromogens?

answer

b.Species that produce pigment in the light or the dark

question

What disease does Chlamydophila psittaci cause in humans?

answer

c.Parrot fever

question

What is the name of the test used to detect rickettsial agents?

answer

c.Weil-Felix

question

At-risk groups for contracting walking pneumonia include all the following, except

answer

d.preschool children.

question

What organism causes epidemic louseborne typhus?

answer

d.R. prowazekii

question

One of the factors that allows Mycoplasma to infect the respiratory tract and the urogenital tract is that

answer

c.they adhere to the epithelium of mucosal surfaces and are not eliminated by mucus secretions.

question

Chlamydia trachomatis produces all the following conditions in adult women, except

answer

c.bacterial vaginosis

question

All of the following diseases are associated with Chlamydia trachomatis,except

answer

a.undulant fever.

question

All of the following are biochemical tests for the identification of Mycobacterium spp., except

answer

d.PYR.

question

Which of the following stains is used to enhance the visibility of mycoplasma-like colonies?

answer

c.Dienes stain

question

What organisms are considered obligate intracellular parasites?

answer

a.Chlamydia

question

Mycoplasmas are different from most other bacteria because they do not have a _____.

answer

a.cell wall

question

An invasive genital disease associated with buboes in the groin describes an infection caused by

answer

d.Chlamydia trachomatis.

question

What constituent of LJ medium is added to suppress the growth of gram-positive bacteria?

answer

b.Malachite green

question

A sputum culture from a patient in Texas has buff colored colonies growing in approximately 4 weeks. After exposure to light, the colonies turn intense yellow. This isolate is most likely

answer

b.M. kansasii.

question

What organism causes human monocytic ehrlichiosis (HME) and uses the lone star tick (Amblyomma americanum) as its primary vector?

answer

b.Ehrlichia chaffeensis

question

What organism's unique life cycle contains an elementary body (EB) and a reticulate body (RB)?

answer

b.Chlamydia

question

What organism causes Rocky Mountain spotted fever?

answer

d.R. rickettsii

question

What medium is recommended for the recovery of Mycobacterium haemophilum?

answer

b.Chocolate

question

What Mycobacterium spp. fails to grow in vitro?

answer

b.M. leprae

question

What is the optimum culture incubation time for most mycobacteria associated with human disease?

answer

a.2 to 6 weeks

question

What is the preferred technique to rapidly detect Chlamydia trachomatis in clinical specimens?

answer

b.Nucleic acid amplification test (NAAT)

question

Cultures for Mycoplasma pneumoniae should be incubated for _____.

answer

d.21 days or more

question

What method is used to confirm a positive Chlamydia trachomatis EIA?

answer

d.NAAT

question

What organism has been recovered in normal, sexually active females but is also associated with chorioamnionitis, congenital pneumonia, and development of chronic lung disease in premature infants?

answer

b.Ureaplasma ureolyticus

question

What are nonchromogens?

answer

c.Species whose colonies remain buff colored after exposure to light

question

How has the treatment of mycobacterial disease changed in light of the multidrug-resistant strains ofmycobacteria that are being isolated?

answer

c.Combinations of three or four drugs are used instead of a single drug.

question

answer

d.Nongonococcal urethritis, Chlamydia trachomatis

question

What classifies an organism as a multidrug-resistant Mycobacterium tuberculosis?

answer

a.Resistance to at least isoniazid and rifampin

Order an Essay Now & Get These Features For Free:

Turnitin Report

Formatting

Title Page

Citation

Outline

Place an Order

Micro II – Quiz 2 – Mod 2

Order an Essay Now & Get These Features For Free: