Aerobic Gram Neg

In suspected cases of brucellosis, the optimal specimen to be collected for the isolation of the etiologic agent is

A. Blood
B. Urine
C. CSF
D. Nasopharyngeal exudates

Colonies of Neisseria sp. turn color when a redox regent if applied. The color change is indicative of the activity of the bacterial enzyme

A. Beta-galactoside
B. Urease
C. Cytochrome oxidase
D. Pheylalanine deaminase

Which microorganism will grow only on culture media supplemented with either cysteine or cystine?

A. Actinobacillus lignieresii
B. Bartonella bacilliformis
C. Francisella tularensis
D. Kingella kingae

A fastidious gram neg bacillus was isolated from a case of periodontal disease, which upon darkfield examination was noted to have gliding motility. The most likely identification of this etiologic agent would be

A. Capnocytophaga
B. Chromobacterium
C. Kingella
D. Plesiomonas

Severe disseminated intravascular cogulation often complications cases of septicemia caused by

A. Acinetobacter sp.
B. Moraxella sp.
C. Neisseria gonorrhoeae
D. Neisseria meningitidis

The Haemophilus influenzae vaccine protects against which serotype?

A. Serotype a
B. Serotype b
C. Serotype c
D. Serotype d

THe sexually acquired disease characteristerized by genital ulcers and tender inguinal lymphphadenopathy, which is caused by a small, gram-negative bacillus, is known as

A. Chancroid
B. Bacterial vaginosis
C. Syphilis
D. Trachoma

The etiologic agent of whooping cough is

A. Bordetella pertussis
B. Brucella suis
C. Francisella tularensis
D. Haemophilus ducreyi

An important characteristic of Neisseria gonorrhoeae or the infection it produces is

A. A gram strain of the organism reveals gram-negative bacilli
B. Asymptomatic infections are common in females
C. Produces disease in humans and domestic animals
D. The bacteria survive long periods outside the host's body

A gram negative, "kidney bean" cellular morphology is a distiguishing characteristic of

A. Neisseria meningitidis
B. Yersinia pestis
C. Bartonella spp.
D. Actinobacter spp.

Erythromycin eye drops are routinely administered to infants to prevents infection by

A. E. coli
B. Haemophilus influenzae
C. Pseudomonas aeruginosa
D. Neisseria gonorrhoeae

Neisseria lactamica closely resembles Neisseria meningitidis but can be differentiated from it by its ability to metabolize

A. Maltose
B. Lactose
C. Glucose
D. Sucrose

A causitive agent of the form of conjunctivitis known as pinkeye is

A. Haemophilus aegyptius
B. Moraxella lacunata
C. Chlamydia trachomatis
D. Klebsiella ozaenae

Legionella pneumonphila is the etiologic agent of both Legionnaires disease and

A. Swine fever
B. Pontiac fever
C. Rift Valley fever
D. San Joaquin Valley fever

In suspected cases of brucellosis, what is the most sensitive specimen to submit for culture?

A. Bone marrow
B. Nasopharyngeal swab
C. Sputum
D. Stool

Which of the following is true of Neisseria gonorrhoeae?

A. Adversely affected by fatty acids in clinical specimens
B. Rapid growth on sheep blood agar
C. Ferments glucose on sheep blood agar
D. ONPG positive

Which of the following statements is not true of Brucella?

A. Infection may occus via abrasions of the oral mucosa, conjunctiva, and genitals.
B. They are fastidious and require supplemented media for isolation.
C. The risk of accidental laboratory infection is no greater than with any other organism.
D. Phage and dye sensitivity tests are used for identification to the species level.

Brucella spp. are

A. The etiologic agents of relapsing fever
B. Small spiral organisms
C. Primarily a cause of endogenous human infections
D. Intracellular pathogens

In cases of legionellosis

A. Person-to-person transmission is common
B. Farm animals are important animal reseroirs
C. Patients can present with a self-limited nonpneumonic febrile illness
D. Specimens may be cold enriched to enhance recovery of the organism

Isolation of Neisseria gonorrhoeae

A. Is enhanced by cold enrichment
B. Requires incubation under increased CO2
C. From contaminated sited is made easier by the use of CIN agar
D. Is not affected if clinical specimen is refrigerated before culturing

Cardiobacterium hominis, an inhabitant of the upper respiratory tract of humans, has been recovered as the etiologic agent from cases of endocarditis. An identifying characteristic of the organism is

A. Positive oxidase
B. Positive catalase
C. Indole negative
D. Inability to grow on sheep blood agar

Which of the following is not true of Haemophilus spp.?

A. Obligate parasites
B. Grow well on sheep blood agar
C. Small, pleomorphic, gram neg coccobacilli
D. Many are found as normal flora in the human respiratory tract

Legionella pneumonia

A. Infections are most often acquired from environmental sources
B. Metabolizes a number of carbohydrates
C. Stains easily on the routine gram stain
D. Does not autofluoresce

Which of the following is the optimal clinical specimen for the recovery of Legionella pneumonia?

A. Stool
B. Blood
C. Bronchial washings
D. Nasopharyngeal swab

Which of the following is not an appopriate medium for primary isolation of Bordetella pertussis?

A. Regan-Lowe
B. Bordet-Gengou
C. Modified Skirrow's medium
D. Buffered charcoal yeast extract

Which of the following is not characteristic of Eikenella corrodens?

A. It is a this, gram neg bacillus
B. Colonies sometimes pit the surface of the agar medium
C. It is found in the mouth and upper respiratory tract of humans
D. It is often found in pure culture when recovered from infections

Which of the following Legionella spp. is positive for hippurate hydrolysis?

A. L. micdadei
B. L. longbeachae
C. L. gormanii
D. L. pneumophila

Which of the following is not characteristic of Haemophilus influenzae biogroup aegyptius?

A. Indole negative
B. Requires V factor
C. Requires X factor
D. Aminolevulinic acid positive

Foodborne outbreaks of brucellosis are most commonly associated with eating

A. Raw shellfish
B. Imported cheese
C. COntaminated potato salad
D. Improperly cooked hamburger

Haemophilus ducreyi is the causitive agent of

A. Chancroid
B. Lymphogranuloma venereum
C. Trachoma
D. Whooping cough

The optimal specimen for the recovery of Bordetella pertussis is

A. Anterior nares swab
B. Blood
C. Expectorated sputum
D. Nasopharyngeal swab

Blood cultures are recommended for the recovery of which of the following microorganisms?

A. Acinetobacter baumannii
B. Brucella canis
C. Chlamydia trachomatis
D. Yersinia enterocolitica

Buffered charcoal yeast extract agar is the recommended medium for the recovery of

A. Hafnia alvei
B. Legionella pneumophila
C. Neisseria meningitidis
D. Vibrio cholerae

The flattened adjacent of the cellular appearance of which microorganism are said to resemble kidney beans??

A. Aeromonas hydrophila
B. Campylobacter jejuni
C. Neisseria gonorrhoeae
D. Pasturella multocida

Which of the Neisseria spp. produces acid from glucose but not from maltose, lactose, or sucrose?

A. Neisseria gonorrhoeae
B. Neisseria lactamica
C. Neisseria meningitidis
D. Neisseria sicca

Which Neisseria spp. produces acid from glucose and maltose but not sucrose or lactose?

A. Neisseria gonorrhoeae
B. Neisseria lactamica
C. Neisseria meningitidis
D. Neisseria sicca

Which of the following is not true about Pasteurella multocida?

A. Most common human infection occur in soft tissues, bones, and joints.
B. Human harbor the organism as part of their normal flora.
C. It is the most virulent of the species in the genes.
D. It grows on sheep blood agar.

The porphytin test determines an organism's requirement for

A. Cystiene
B. Hemin
C. NAD
D. Thiol

Which of the following is an occasional cause of respiratory tract ifections and is rapidly urea positive?

A. Bordetella bronchiseptica
B. Brucella abortus
C. Campylobacter fetus
D. Escherichia coli

The characteristic growth pattern known as "satelliting" is associated with

A. Burkholderia pseudomallei
B. Campylobacter jejuni
C. Haemophilus influenzae
D. Yersinia pestis

Colonies that are said to resemble "droplets of mercury" are characteristic of

A. Bordetella pertussis
B. Burkholderia cepacia
C. Campylobacter jejuni
D. Yersinia pestis

When an epidemiologic survey for the detection of upper respiratory tract carriers of Neisseria meningitidis or Bordetella pertussis is being conducted, the optimal type of specimen to be obtained for culture is

A. Anterior nares
B. Buccal cavity
C. Nasopharyngeal
D. Throat

Milk had classically been the primary food associated with the transmission of some diseases, especially for those diseases of cattle transmissible to humans, such as

A. Brucellosis
B. Glanders
C. Meliodosis
D. Pontiac fever

Which of the following is not appropriate for the cultivation of Neisseria gonorrheae?

A. Chocolate agar
B. Cefsulodin-irgasan-novobiocin
C. Martain-Lewis agar
D. Modified Thayer-Martin agar

The porphyrin test is most useful for the identification of which of the following?

A. Campylobacter
B. Heamophilus
C. Moraxella
D. Neisseria

Which of the following is not true about the laboratory diagnosis of pertussis?

A. Regan-Lowe medium is the recommended medium
B. DFA test results are definitive and do not need to be confirmed by culture.
C. Calcium alginate or Dacron swabs are recommended over cotton-tipped swabs for specimen collection
D. Material collected from the naso-pharyngnx is optimal for detection of the causative agent

New York City agar was developed for the isolation of

A. Bordetella pertussis
B. Campylobacter fetus
C. Haemophilus influenzae
D. Neisseria gonorrhoeae

Eikenella corrodens is an opportunistic pathogen, but it is most noted for causing

A. Abscesses of the oral cavity
B. Pneumonia
C. Post surgical would infections
D. Urinary tract infections

Which of the following is the most common indicator of bacterial vaginosis?

A. Eikenella
B. Capnocytophaga
C. Gardnerella
D. Listeria

Why are cultures for Gardnerella vaginalis not recommended?

A. The bacteria grow so slowly that
results take too long to be relevant.
B. Isolation of the bacteria may not be
clinically significant.
C. It is unsafe to grow this bacterium.
D. Artificial media are not available.

Kingella denitrificans can be differenti- ated from Neisseria gonorrhoeae because it is

A. Able to grow on Thayer-Martinagar
B. Able to reduce nitrates
C. Oxidase positive
D. Glucosepositive