Sterile Body Fluids
The most common etiologic agent of septic arthritis in adults younger than 30 years of age is:
Neisseria gonorrhoeae.
What is the most common cause of sepsis? (broad not specific)
bacteria
2 least likelihood of contamination.
One of the most important uses of the Gram stain of expectorated sputum received for routine bacteriologic culture is to:
evaluate the quality of the specimen.
The most common etiologic agent in uncomplicated community-acquired urinary tract infection is
E. coli
Describe the five main cavities of the human body.
Cranial, Spinal, thoracic, abdominal, and pelvic
Name an automated continuous monitoring system in microbiology.
BacTec, BacT Alert, virtuo, blood culture analyzers
The most common source(s) of infection in the central nervous system (CNS) is(are):
hematogenous spread.
A 16-year old presented with fever, cough and pain in the left ear. Sputum culture revealed many small gram negative coccobacilli, few epithelial cells and moderate white blood cells. The most likely etiological agent of the infection is:
Haemophilus influenzae.
Complicated and uncomplicated urinary tract infections can be differentiated according to which of the following?
An uncomplicated urinary tract infection does not reoccur and is not associated with other structural or physiological abnormalities.
What is the fluid removed from the abdominal cavity called?
Paracentesis
Ascites fluid
Peritoneal fluid
A cancer patient was admitted to the hospital with fever, tachycardia, and low blood pressure. The patient is actively being treated with chemotherapy for cancer through an intravenous catheter. 2 sets of blood cultures were drawn to assess the state of her indwelling catheter; one from the catheter and one from a venipuncture. 48 hours after collected, the patient had positive blood cultures revealing Staph epi. How do we know if this is a contaminant or an infection of the catheter?
both blood culture sets (catheter and venipuncture) will be positive
Proper storage of cerebrospinal fluid (CSF) sent to the laboratory for bacterial culture includes:
incubation at 35°C or room temperature.
A 80-year-old male presents with fever, cough and productive sputum. A sputum specimen was sent for culture. The gram stain revealed few gram positive cocci, rare gram negative rods, and pleomorphic gram positive organisms with few white blood cells and >15 squamous epithelial cells. The gram stain indicates:
inadequate specimen, recommend recollection.
True or false? All urinary tract infections are monomicrobic, in other words only a single type of organism is isolated during the infection.
False
Describe the specimen processing of a solid tissue sample?
cut, grind, inoculate media, benihana a different piece to place in broth
Which organism is the most common etiologic agent in prosthetic heart valve endocarditis?
Staph. epi
A collective term used for the three layers of membranes surrounding the brain and spinal column is the:
meninges
The most common cause of community-acquired pneumonia in adults, regardless of age, is:
S. pneumoniae.
When an infection of the bladder results in infection of the kidney after days of no treatment, this is called what type of infection?
ascending
A body fluid was sent to the micro lab for culture and grew small catalase positive, non-spore-forming, gram positive rods on the BAP. What organism is the most likely to have grow and what is the pathogenicity of the organism?
Probable contaminant, diphtheroids, normal skin flora
What is the minimum volume in mL required to collect a complete set of adult blood cultures?
10 mL
The microbiologist received a CSF specimen for gram stain and culture. Upon processing the specimen, and reviewing on gram stain, the microbiologist reported numerous white blood cells and no organisms noted. The microbiologist should:
report the gram stain and set-up the culture as ordered.
A relatively common illness in young children, primarily those younger than 3 years of age, whose presentation includes variable fever, inspiratory stridor (difficulty in moving enough air through the larynx), hoarseness, and a harsh, barking, nonproductive cough, is:
laryngotracheobronchitis.
When evaluating urine specimens, when might we interpret the growth as contamination?
>3 organisms present