4.2 Size distribution of bacteria and fungi
The maximum number of indoor culturable total bacteria, gram negative bacteria and fungi at Rural Site I were isolated from stage 3 (3.3–4.7 μm) (Fig. 2), whereas the size distribution outdoors was completely different with the highest number present in the size range 7 μm and above (Stage 1), 0.65–1.1 μm (stage 6) and 3.3–4.7 μm (stage 3), respectively (Fig. 3). A shift in the size distribution of bacterial aerosol outdoors highlights the differences in the indoor/outdoor environment. Outdoor spaces at the rural sites either had a large number of livestock or open sewage lines in the streets.