1
How can Bacillus anthracis and Bacillus cereus be told apart?
Bacillus cereus is motile and penicillin resistant
Bacillus anthracis is nonmotile and penicillin susceptible
What disease is caused by Coxiella burnetti?
Q fever
What organism causes purulent conjunctivitis?
Haemophilus influenza biogroup aegyptius
What is the difference between antiseptic and disinfectant?
Antiseptic is used on body
Disinfectant is used on nonliving surfaces such as counter
What percentage of individuals get reactivated tuberculosis?
5-15%
Lymphogranuloma venereum (LGV) is caused by what serotypes of Chlamydia trachomatis?
L1, L2, L2B, L3
A neonatal has meningitis. The organism was grown on CAMP with S. aureus and created a rectangle and is BEA positive. What organism is suspected?
Listeria monocytogenes
This organism is a gram positive spore forming bacilli and produce Toxin A & B. This organism grows on Cycloserin cefoxitin fructose (CCF) and C. difficile selective agar (CDSA).
Clostridium difficile
Urine specimens are cultured using what and what method?
Calibrated loop
Semiqualitative way (line down the middle then wave)
This organism presents with a metallic green sheen on EMB, IMVC ++--, and ONPG positive
Escherichia coli
The difference between the acid fast stains are? What are they used for?
Auromin-rhodamine is screening for mycobacterium, Ziehl-Neelsen and Kinyoun is confirmation.
Auromin-rhodamine is a fluorochrome stain (fluorescent). Ziehl-Neelsen is a heat. Kinyoun is the cold.
A patient with chronic granulomatous disease grew an organism on SBA that was yellow, serrated, smooth colony. This organism is?
Burkholderia cepacia
This organism was gram positive in clusters. The clusters were confirmed by a positive catalase. The analyst performed a tube coagulase test and it was negative. How would you differentiate between Staphylococcus epidermis and S. saprophyticus?
Novobiocin
S. saprophyticus has inherited novobiocin resistant
S. epidermis is susceptible to novobiocin.
Violet pigment on SBA
This organism is a slow grower that is non-spore forming, partially acid fast, branching gram positive that grows on BCYE.
Nocardia
Lowenstein Jensen (LJ) selects for who? and is what based media?
Mycobacteria
Egg based
This organism will have no carbohydrate reactions.
Moraxella catarrhalis
E. coli O157: H7 can progress to what?
Hemolytic Uremic Syndrome
What is the confirmatory test for syphilis?
Treponemal tests for antibody
FTA-Ab, TP-PA, EIA
What is the leading cause of gastroenteritis in the U.S.?
Campylobacterium jejuni
Shigella sonnei (D serotype) will have what results for Mannitol fermented, ODC, ONPG?
This organism is a bipolar staining resembling a safety pin. The organism optimum growth is 25-32C. The organism is nonmotile at 25C.
What disease does it cause?
Yersinia pestis
Black plaque
This organism has botulism toxin that is found in home canned foods and why you can't give honey to babies under 2 years old.
Clostridium botulinum
What are the stages of Treponema pallidum subsp. pallidum? What are the key characteristic factors?
First- painless chancre
Second- rashes on palm of hands and sole of feet
Latent- absence of disease and positive serology
Teritary- CNS involvement
This organism is gram positive chains, beta hemolytic and had mucoid colonies, and was bacitracin susceptible. What organism is suspected?
Group A Streptococcus (Streptococcus pyogenes)