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Continuing Education — "The Action Level!®"

VOLUME 8(2), February 2011
Journal of Occupational and Environmental Hygiene


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CASE STUDIES:

Isolation of Airborne Oxacillin-Resistant Staphylococcus Aureus from Culturable Air Samples of Urban Residences
Hernando R. Perez, Rachel Johnson, Patrick L. Gurian, Shawn G. Gibbs, Jennifer Taylor and Igor Burstyn

1. Replica plating of viable airborne samples was performed
    on which type of agar?

a. Tryptic Soy
b. Malt Extract
c. Chapman Stone
d. Nutrient
2. Foods of animal origin have been identified as reservoirs of
    antibiotic resistant pathogens. True or False?
True
False
Identification and Measurement of Diacetyl Substitutes in Dry Bakery Mix Production
Gregory Day, Ryan LeBouf, Ardith Grote, Stephanie Pendergrass, Kristin Cummings, Kathleen Kreiss and Greg Kullman

3. The functional group held in common by diacetyl, acetoin,
    2,3-pentanedione, 2,3-hexanedione and 2,3-heptanedione
    (butter flavorings) is a carbon-oxygen double bond.
    True or False?

True
False
4. In this work, which of the following ketone molecules was
    measured (OSHA 1013) during dry bakery mix production?
a. Diacetyl
b. 2,3-Hexanedione
c. Acetoin
d. 2,3-Pentanedione
Silica Exposure Assessment in a Mortality Study of Vermont Granite Workers
Dave K. Verma, Pamela M. Vacek, Karen des Tombe, Murray Finkelstein, Barbara Branch, Graham W. Gibbs and William G. Graham

5. The recommended/regulated Occupational Exposure Limits
    for respirable silica vary greatly in the world. Currently, the
    ratio of highest to lowest recommended limit is about 8. True
    or False?

True
False
6. The most widely used conversion factor to convert impinger
    count in terms of mppcf to equivalent respirable silica in
    mg/m3 in the Vermont granite industry is 10 mppcf =
    0.1 mg/m3. True or False?
True
False
Characterization and Control of Airborne Particles Emitted During Production of Epoxy/Carbon Nanotube Nanocomposites
Lorenzo G. Cena and Thomas M. Peters

7. The morphology of the protrusions extending from the
    particles generated during sanding of CNT-epoxy resembled
    that of bulk CNTs. True or False?

True
False
8. What control measure was most effective to contain particles
    generated when sanding CNT epoxy nanocomposites?
a. The work table
b. The custom hood
c. The biosafety cabinet
d. The glove box
Correcting Diacetyl Concentrations from Air Samples Collected with NIOSH Method 2557
Jean Cox-Ganser, Gary Ganser, Rena Saito, Gerald Hobbs, Randy Boylstein, Warren Hendricks, Michael Simmons, Mary Eide, Greg Kullman and Chris Piacitelli

9. The mathematical correction procedure described in this
    manuscript would be applicable only to diacetyl samples
    collected on:

a. dried, cleaned silica gel sorbent tubes
b. carbon molecular sieve sorbent tubes
c. charcoal sorbent tubes
d. a and b
10. In addition to the laboratory reported diacetyl concentration,
      application of the correction procedure requires the following
      information:
a. absolute humidity during sampling
b. temperature and relative humidity at the
          time of sample analysis
c. number of days between sample collection
          and sample extraction
d. the number of days between sample extraction
          and sample analysis
e. a and c
f. b and d
The Risks and Benefits of Chemical Fumigation in the Healthcare Environment
George Byrns and Thomas P. Fuller

11. Which of the following pairs would mostly likely be
      considered for hospital room fumigation?

a. formaldehyde and methyl bromide
b. formaldehyde and glutaraldehyde
c. ozone and super-oxidized water
d. chlorine dioxide and hydrogen peroxide plasma
12. Given its presence on environmental surfaces, which
      of the following bacterial agents would exhibit the longest
      viability?
a. Escherichia coli
b. Clostridium difficile
c. Methicillin-resistant Staphylococcus
          aureus (MRSA)
d. Vancomycin-resistant enterococcus (VRE)
Anthrax Letters in an Open Office Environment: Effects of Selected CDC Response Guidelines on Personal Exposure and Building Contamination
Bill Kournikakis, Kenneth F. Martinez, Robert E. McCleery, Sean V. Shadomy and Gabriel Ramos

13. Which of the following would be the most reasonable
      conclusion from studies such as this?

a. A need exists for quantitative and scientific
          verification of such guidelines.
b. Verification is typically weighted toward
          quantitative evaluation.
c. Scientific verification tops the scale in terms
          of relevance.
d. Sulfur hexafluoride tracer has been discredited.
14. Based upon this type of evaluation, the most appropriate
      action for a letter open would consist of which of the
      following alternatives?
a. Leave in the company of coworkers.
b. Leave before coworkers.
c. Leave after coworkers.
d. None of the above.

Be sure FULL NAME and EMAIL information is provided at the top of this page before submitting your answers.


Deadline for answers is February 28, 2011.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on March 9, 2011.

 
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