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Continuing Education — "The Action Level!®"

VOLUME 7(12), December 2010
Journal of Occupational and Environmental Hygiene


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CASE STUDIES:

Occupational Mouse Allergen Exposure among Non-Mouse Handlers
Jean Curtin-Brosnan, Beverly Paigen, Karol A. Hagberg, Stephen Langley, Elise A. O'Neil, Mary Krevans, Peyton A. Eggleston and Elizabeth C. Matsui

1. Almost two-thirds of non-mouse handlers were exposed
    to detectable breathing zone mouse allergen concentrations.
    True or False?

True
False
2. Which worker group had the highest mouse allergen
    exposure?
a. Administrative/Support
b. Animal Care
c. Bench Laboratory
d. Scientists
e. Supplies and Materials Handlers
Occupational Exposure to Polycyclic Aromatic Hydrocarbons in Airborne Particulate Matter: Validation and Application of a Gas Chromatography-Mass Spectrometry Analytical Method
Marzia Fioretti, Tamara Catrambone, Andrea Gordiani and Renato Cabella

3. According to the last IARC Monograph (Volume 92, 2010),
    which statement is correct?

a. Every PAH is carcinogenic to humans and
          classified by the IARC in Group 1.
b. BaP is carcinogenic to humans. In addition,
          several PAHs are classified by the IARC as
          probably and possibly carcinogenic to humans.
          The PAHs with five rings or more are mainly
          found in the gaseous-phase, whereas the lighter
          2-4-ring PAHs are generally bound to particulate
          matter.
c. BaP is carcinogenic to humans. In addition,
          several PAHs are classified by the IARC as
          probably and possibly carcinogenic to humans.
          The PAHs with five rings or more are more
          hazardous to humans.
4. Which statement best represents the utility of the
    proposed method?
a. It is a useful tool to evaluate occupational
          exposures to trace levels of particulate
          phase PAHs.
b. It is a suitable procedure for reliable determination
          of the 16 priority PAHs.
c. It quantifies lighter 2-4-ring PAHs (generally
          present in vapor phase).
Effectiveness of Dust Control Methods for Crystalline Silica and Respirable Suspended Particulate Matter Exposure during Manual Concrete Surface Grinding
Farhang Akbar-Khanzadeh, Sheryl A. Milz, Cynthia D. Wagner, Michael S. Bisesi, April L. Ames, Sadik Khuder, Pam Susi and Mahboubeh Akbar-Khanzadeh

5. Which of the following best discriminates between significant
    and non-significant influences in terms of respirable dust
    concentrations (significant = yes; not significant = no):

a. yes – local exhaust ventilation; no – wet dust
          control method
b. yes – general ventilation; no – grinder diameter
c. yes – general ventilation, grinder diameter,
          wet dust control method and local ventilation
          system; no – grinding surface position
d. yes – local exhaust ventilation; no – wet
          dust control method and the grinding surface
          position
6. The results suggested that the concentrations of silica dust
    of area samples were:
a. lower than, but not significantly correlated
          with, those of the concurrently collected
          personal samples.
b. higher than, but not and significantly correlated
          with, those of the concurrently collected
          personal samples.
c. lower than, and significantly correlated with,
          those of the concurrently collected personal
          samples.
d. higher than, and significantly correlated with,
          those of the concurrently collected personal
          samples.
Where's the Dust? Characterizing Locations of Azinphos-Methyl Residues in House and Vehicle Dust among Farm Workers with Young Children
Gloria D. Coronado, William C. Griffith, Eric M. Vigoren, Elaine M. Faustman and Beti Thompson

7. With respect to azinphos methyl loadings in house dust,
    the findings showed that:

a. thick carpets had higher levels than thin carpets.
b. thick and thin carpets had higher levels than
          smooth floor surfaces.
c. living rooms has significantly lower levels than
          other rooms in the house.
8. According to our results, trucks have higher concentrations
    of azinphos methyl than cars. True or False?
True
False
Culture-Independent Characterization of Bacteria and Fungi in a Poultry Bioaerosol Using Pyrosequencing: A New Approach
M.W. Nonnenmann, B. Bextine, S.E. Dowd, K. Gilmore and J.L. Levin

9. According to this article, determination of concentrations
    of bacteria and fungi in organic dusts has to date been largely
    limited to culture-based techniques. True or False?

True
False
10. Which of the following is NOT used to identify individual
      genera or species from environmental samples such as
      those discussed in this article?
a. High conserved genomic sequences
b. Stable genomic sequences
c. Divergent sequences

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Deadline for answers is December 31, 2010.

Answers will be available online at
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on January 10, 2011.

 
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