Mycobacteria
What concentration of sodium hydroxide (NaOH) is used to prepare a working decontamination solution for the processing of not normally sterile specimens for mycobacteria?
Which virus is the most common etiological agent of viral respiratory disease in infants and children?
Rickettsia rickettsii and Ehrlichia chaffeensis are both transmitted by which arthropod vector?
What are Ticks?
A gram positive spore forming bacillus growing on anaerobic blood agar (CDC) produces a double zone of beta hemolysis and is positive for lecithinase. What is the presumptive identification?
What is Clostridium perfringens?
Primary atypical pneumonia is caused by....
What is Mycoplasma pneumoniae?
Mycobacteria stained by the Ziehl-Neelsen or Kinyoun methods with methylene blue counterstain are seen microscopically as...
What are Bright red rods against a blue background?
Which virus belonging to Reoviridae group causes gastroenteritis in infants and young children but an asymptomatic infection in adults?
Which specimen would be best for isolation of Chlamydia trachomatis from a female patient with a genital infection?
What is an Endocervical swab?
Which Clostridium species caused antibiotic associated diarrhea?
Which organism typically produces “fried egg” colonies on agar within 1-5 days of culture from a genital specimen?
What is Mycoplasma hominis?
Acid-fast staining of a smear prepared from a first morning expectorated sputum showed slender, slightly curved, beaded, red mycobacterial rods. Growth on Middlebrook 7H10 slants produced buff-colored colonies with a serpentine pattern after 14 days at 37C. Niacin and nitrate reduction tests were positive. What is the most probable presumptive identification?
What is Mycobacterium tuberculosis?
Which is the first antibody to appear in recurrent or acute Hepatitis B infection?
What is IgM anti-HBc?
Which organism is the causative agent of Q fever?
What is C. burnetii?
A necrotic ulcer has grown on the foot of a patient with poorly controlled Diabetes mellitus. Cultures of the wound are sent to the Microbiology lab. The resulting colonies are catalase positive, emit a foul odor, and turn the BBE plate black. What antibiotics, commonly used in anaerobic media, will this organism be resistant to?
A 19 year old patient visited the college health center with complaints of extreme fatigue, fever, sore throat, and swollen lymph nodes. Her serological work up yielded the following results:
Anti-VCA (IgM): positive
Anti-VCA (IgG): positive
Anti-EA-D: positive
Anti-EA-R: negative
Anti-EBNA: negative
Based on these results, the most likely cause of the patient’s illness is:
What is Acute infectious mononucleosis?
Which organism is the causative agent of leprosy?
What is M. leprae?
The manganous chloride-urea test is used for the identification of which organism?
What is Ureaplasma urealyticum?
What is M. szulgai?
According to the updated algorithm for HIV testing from the CDC (2014), a positive result on an HIV-1/2 antigen/antibody combination immunoassay should be followed by:
What is HIV-1/HIV-2 antibody differentiation immunoassay?
The principle of which test is based on cross reactivity between Rickettsia and some Proteus species?
Which gram negative anaerobic bacilli produce brick red fluorescence under ultraviolet light?
What is Porphyromonas?