The effect of central air filtration and air conditioning on pollen and microbial contamination

A comparison of regional atmospheric pollen with pollen collected at and near homes

“…Outdoor rotorod samplers also appeared to have sufficient unfilled surface to accommodate more particulate. Spiegelman et al (1963) and Spiegelman & Friedman (1968) report pollen concentrations of over 5000 pollen grains/m3 air outside homes, but the highest pollen concentration obtained in our study was 186 grains/m3.…”

Indoor air microbiological evaluation of offices, hospitals, industries, and shopping centers

“…Few authors have worked with quantitative analysis of microorganisms in indoor environments. These studies, in general, were carried out in different conditions of those used in this one (Spiegelman & Friedman 1968, Buttner & Stetzenbach 1993, Stewart et al 1995, making difficult to compare these data. Macher et al (1991) studied a single person home environment, during the period of two years just after its construction and occupation.…”

Ragweed hay fever: treatment by local passive administration of IgG antibody

“…Moreover, the estimate of AgE, 0-2 /ig, assumed that the patient was outside at all times, whereas in reality, most patients were in air-conditioned environments during considerable portions of the season. The data of Spiegelman & Friedman (1968) indicate that pollen counts in August and September are reduced by at least 100-fold in an air-conditioned house. Therefore, the quantities of AgE that many of our patients actually inhaled were probably of the order of 2 ng for the pollination season.…”