Clustered & Chained
Alpha-hemolytic organism is optochin sensitive and bile soluble.
What is Streptococcus pneumoniae?
This test is positive for all members of the Proteeae tribe. (Must say the whole name of the test)
What is phenyalanine deaminase?
Fecal cultures are inoculated on thiosulfate-citrate-bile salts-sucrose agar specifically for the isolation of:
What is Vibrio spp?
A skin ulcer organism grows best at 30–32°C and produces toxin-mediated necrosis.
What is Mycobacterium ulcerans?
This disk test is used to test for Peptostreptococcus anerobius?
What is SPS?
Produces terminal spores and causes muscle spasms.
What is Clostridium tetani?
Describe the cellular morphology of Neisseria spp?
What is GNDC, kidney bean shaped?
The pulmonary form of anthax is known as:
What is Woolsorter's Disease?
The etiologic agent of whooping cough:
What is Bordetella pertussis?
A neonatal sepsis case yields a beta-hemolytic, catalase-negative organism that is CAMP positive
What is Streptococcus agalactiae?
Swimmer's ear, a form of external otitis, is commonly caused by this gram-negative organism.
What is Pseudomona aeruginosa?
On gram stain, a morphology that resembles "seagull wings" is most characteristic of:
What is Campylobacter jejuni?
The etiological agent for Hansen disease:
What is M. leprae?
This organism is an anaerobic GNR that is commonly associated with bacterial vaginosis:
What is Mobiluncus spp?
Egg yolk agar showing precipitate in the medium surround the colony is positive for:
What is lecithinase?
This organism exhibits a hockey-puck appearance when pushed across the agar.
What is Moraxella catarrhalis?
Motile, beta-hemolytic organism causing food poisoning.
What is Bacillus cereus?
This organism is found in the mouth and human respiratory tract of humans. When grown on BAP, it pits into the agar and creates a bleach-like odor?
What is Eikenella corrodens?
Exfoliatin produced by S. aureus is responsible for causing:
What is Scalded Skin Syndrome?
Hemolytic uremic syndrome is a complication after infection with:
What is E. coli O157:H7?
The symptom of diffuse, watery diarrhea that produces a relatively clear stool containing mucus flecks is suggestive of:
What is Vibrio chlorae?
A slow grower produces pigment only after light exposure.
What is a photochromogen?
Black-pigmented anaerobe associated with oral infections.
What is Prevotella melaninogenica?
This organism causes pseudomembranous colitis after antibiotics.
What is Clostridioides difficile?
CSF shows intracellular diplococci that ferment glucose and maltose.
What is Neisseria meningitidis?
This organism is associated with infections in humans often linked to deli meats and improperly pasteurized dairy products.
What is Listeria monocytogenes?
What is hallmark sign of an anaerobic infection?
What is a Foul odor?
Blood cultures grow alpha-hemolytic streptococci that are optochin resistant and associated with endocarditis.
What are viridans streptococci?
Cefsulodin irgasan novobiocin agar is recommended for this organism:
What is Yersinia enterocolitica?
A halophilic organism from seawater wound infection causes rapid necrosis.
What is Vibrio vulnificus?
This mycobacterium appears buff colored after exposure to light and is niacin positive.
What is M. tuberculosis?
This anaerobic gram-negative rod produces dark pigmented colonies and may demonstrate a brick-red fluorescence under UV light, commonly associated with oral infections.
What is Porphyromonas spp?
This bacterium is potentially lethal causing food poisoning often associated with improperly canned food.
What is C. botulinum?
This organism oxidizes glucose, maltose, and lactose/
What is N. lactamica?
Palisading rods producing toxin-mediated pseudomembrane.
What is Corynebacterium diphtheriae?
A catalase negative gram positive cocci is isolated from a urine sample of a hospitalized patient. The bacterium produced a black pigment on bile esculin agar and formed acid from glucose in the presence of 6.5% NaCl. The most likely identification of this bacterium is:
What is Enterococcus spp.?
A nonlactose fermenter is isolated from a stool specimen. A biochemical assay identifies the isolate as Shigella spp. The isolate demonstrates agglutination in Shigella group B antisera. The Shigella species is:
What is Shigella flexneri?
Infection of the gastic mucosa leading to gastris and peptic ulcers is associated with:
What is Helicobacter pylori?
Which of the following specimes would be routine decontaminated when trying to recover Mycobacterium spp?
A. Sputum
B. Pleural fluid
C. Lung biopsy
D. CSF
A. Sputum
What is Bacteroides fragilis?
This organism is part of the vaginal normal flora that helps resist the onset of bacterial vaginosis?
What is Lactobacillus spp?
Erythromycin eye drops are routinely administered to infants to prevent infections caused by:
What is Neisseria gonorrhoeae?
Partially acid-fast branching rods causing pulmonary disease.
What is Nocardia?
This organism is a gram-negative rod that produces infections most often acquired from environmental sources, such as contaminated AC units.
What is Legionella pneumophila?
A microbiology tech receives in a throat swab. While streaking the blood agar plate, she stabs the agar. After incubation, she notices hemolysis around the bottom of the stab line and on top. Explain why she stabbed the agar.
When culturing a throat swab, one of the pathogens you look for is S. pyogenes. This organism produced Streptolysin S (oxygen stable) and O (oxygen labile).
A patient presents with gastroenteritis after handling freshwater fish. Stool culture yields non-lactose fermenting colonies on MacConkey agar. The organism is motile, oxidase negative, and produces H2S.
Biochemical results:
What is Edwardsiella tarda?
A patient presents with watery diarrhea after swimming in freshwater. Stool culture yields non-lactose fermenting colonies on MacConkey agar. The organism is oxidase positive and grows well on routine media without added salt.
Biochemical results:
What is Aeromonas?
An AIDS patient develops disseminated infection from a nonchromogen organism that is Niacin negative, nitrate positive, SQ negative, 68°C variable.
What is Mycobacterium avium complex?
This is an anaerobic, long, thin, gram-negative rod with pointed ends. It is inhibited by bile salt and sensitive to kanamycin.
What is Fusobacterium?
Chronic suppurative infection producing granulomatous lesions with a molar tooth-like appearance on agar and branching rods under a microscope.
What is Actinomyces israelii?
Name three media plates used specifically for the cultivation of Neisseria spp?
What is Chocolate agar, MTM/TM, and NYC agar?
Zoonotic infection with well-demarcated skin lesion after animal exposure.
What is Erysipelothrix rhusiopathiae?
The sexually acquired disease characterized by genital ulcers and tender inguinal lymphadenopathy, which is caused by a small gram-negative bacillus known as:
What is Chancroid?
How would you differentiate Leuconostoc and Pediococcus?
Leuconostoc is Vancomycin resistant; Pediococcus is sens
A 10-year-old patient presents with right lower quadrant abdominal pain, fever, and leukocytosis, initially suspected to be acute appendicitis. Imaging reveals mesenteric lymphadenitis instead of an inflamed appendix.
Stool culture yields non-lactose fermenting colonies. The organism is a gram-negative coccobacillus demonstrating motility at 25°C but not at 37°C. It grows well after cold enrichment.
Biochemical results:
What is Yersinia enterocolitica?
A patient presents with acute watery diarrhea and abdominal cramping after consuming raw oysters. Stool culture yields a curved, oxidase-positive gram-negative rod that grows well in high-salt conditions.
On selective media:
Biochemical results:
What is V. parahaemolyticus?
This organism is associated with respiratory infections. Its cells are long and broad with distinct crossbanding. It is Niacin negative, nitrate positive, both catalase positive
What is M. kansaii?
This is an anaerobic GNC that resides in the oral cavity and is Vancomycin resistant.
What is Viellonella?
Name 3 Naegler positive organisms.
What are C. perfringens, C. sordelli. C. bifermentans, or C. novyi?
n older adult with chronic lung disease presents with productive cough and exacerbation of COPD. Sputum Gram stain shows gram-negative diplococci. The organism is oxidase positive and grows well on blood and chocolate agar.
Biochemical results:
What is M. cattarrhalis?
This organism causes an allergic respiratory disease called "Farmer's Lung". It is also associated with actinomycotic mycetomas, pustular cellulitis, and hypersensitivity pneumonitis.
What is Nocardia?
An immunocompromised patient presents with rapidly progressive cellulitis and sepsis following a dog bite. Culture yields a thin, spreading gram-negative rod demonstrating gliding motility.
The organism grows best in increased CO₂ (capnophilic conditions) and is part of the normal oral flora of dogs and humans.
Biochemical/phenotypic clues:
What is Capnocytophaga canimorus or Capnocytophaga spp?