Chapter 9

Question 1

What are thommens postulates of allergenicity

Answer 1

Pollen must be capable of eliciting an allergic response, anemophilous (wind pollinated), buoyant, abundant, widely distributed

Question 2

Principle methods of volumetric air sampling

Answer 2

Impaction, impingement, filtration

Question 3

Durham sampler

Answer 3

Micro slides coated with adhesive and exposed for a 24 hr period. Cons: biased for larger particles, cannot determine concentration, exposed to weather

Question 4

Settle plates

Answer 4

Particles allowed to settle on afar medium for period of time and then incubated and counted (bacteria, molds). Cons: biased towards larger particles, cannot determine concentration, indoor use only

Question 5

Slit impactor types

Answer 5

Burglars spore trap and allergenic o air sampler

Question 6

Burkard spore trap

Answer 6

Known amounts of air drawn in through sampling orifice. Efficient for particles lass than 10um. Affected by wind speed.

Question 7

Allergenco

Answer 7

Non wind oriented, grab type suction. Primarily indoor.

Question 8

Rotorod

Answer 8

Ross sweep through air and collect particles on surfaces coated with adhesive, volumetric count. Not affected by wind, not efficient for smaller particles <10um

Question 9

Anderson sieve

Answer 9

Series of sieves with perforations- particles pass through and separated into size specific fractions. Airborn fungo. Expensive.

Question 10

Gross pollinates when?

Answer 10

Late spring to summer months. Year round in souther climates.