## 3 Results
### Fungal Aerosol Concentration
Summarizing, the share of RF of fungal aerosol in the Krakow stable was as follows: 89.91% \(\times\) 85.73% \(<\) 63.94% \(<\) 53.28% in the morning, during daily activities, during mid-day lack of activity, and during feeding, respectively. In the Tarnow stable, the share was: 84.97% \(<\) 70.21% \(<\) 69.15% \(<\) 55.95% during feeding, during mid-day lack of activity, during daily activities, and in the morning, respectively. Figure 2: Share (%) of different aerodynamic diameters of airborne fungi in the Kraków (**A**) and Tarnow (**B**) horse stables at different times of the day (M—early morning-no activity; F—feeding; I.B.—indoor background, mid-day; A—afternoon, animals return; O.B.—outdoor background). Figure 3: Relative abundance (%) of fungal species, the share of which in the total number of reads exceeded 0.2% (**A**) and 10 most abundant fungal genera in the examined sample (**B**). \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Time of Day**} & \multicolumn{2}{c}{**Early Morning**} & \multirow{2}{*}{**Feeding**} & \multicolumn{2}{c}{**Mid-Day**} & \multicolumn{2}{c}{**Activity**} & \multicolumn{2}{c}{**Outdoor Background**} \\ \cline{2-10}  & \multicolumn{2}{c}{**(No Activity)**} & & & & & & & & \\ \hline
**Horse Stables** & **Kraków** & **Tamów** & **Kraków** & **Tamów** & **Kraków** & **Tamów** & **Kraków** & **Tamów** & **Kraków** & **Tamów** \\ \hline Fraction F1 (7.0–11.0 \(\mu\)m) & \multirow{2}{*}{541 (1)} & \multirow{2}{*}{701 (300)} & \multirow{2}{*}{2.82 \(\times\) 10\({}^{4}\)**} & \multirow{2}{*}{336 (336)} & \multirow{2}{*}{422 (2)} & \(1.65\times 10^{3}\) & \multirow{2}{*}{901 (1)} & **3.53 \(\times\) 10\({}^{3}\)**} & \multirow{2}{*}{0 (0)} & \multirow{2}{*}{128 (128)} \\  & & & **(34)** & & & & & & \\ \hline Fraction F2 & \multirow{2}{*}{212 (12)} & \multirow{2}{*}{654 (995)} & \multirow{2}{*}{2.41 \(\times\) 10\({}^{4}\)**} & \multirow{2}{*}{830 (18)} & \multirow{2}{*}{70 (0)} & \multirow{2}{*}{860 (53)} & \multirow{2}{*}{858 (8)} & **3.59 \(\times\) 10\({}^{3}\)**} & \multirow{2}{*}{12 (2)} & \multirow{2}{*}{44 (0)} \\  & & & **(617)** & & & & & & \\ \hline Fraction F3 & \multirow{2}{*}{436 (36)} & \multirow{2}{*}{925 (571)} & \multirow{2}{*}{1.90 \(\times\) 10\({}^{4}\)**} & \multirow{2}{*}{601 (247)} & \multirow{2}{*}{173 (3)} & \multirow{2}{*}{931 (365)} & \multirow{2}{*}{1.33 \(\times\) 10\({}^{3}\)} & **3.82 \(\times\) 10\({}^{3}\)**} & \multirow{2}{*}{12 (4)} & \multirow{2}{*}{22 (22)} \\  & & & **(41)** & & & & & & \\ \hline Fraction F4 & \multirow{2}{*}{594 (6)} & \multirow{2}{*}{306 (118)} & \multirow{2}{*}{1.57 \(\times\) 10\({}^{4}\)**} & \multirow{2}{*}{2.31 \(\times\) 10\({}^{3}\)} & \multirow{2}{*}{281 (1)} & \multirow{2}{*}{2733 (59)} & \multirow{2}{*}{1.94 \(\times\) 10\({}^{3}\)} & **3.98 \(\times\) 10\({}^{3}\)**} & \multirow{2}{*}{59 (4)} & \multirow{2}{*}{146 (0)} \\  & & & **(201)** & & & & & & \\ \hline Fraction F5 & \multirow{2}{*}{5.65\(\times\)10\({}^{3}\) (148)} & \multirow{2}{*}{347 (206)} & \multirow{2}{*}{1.67 \(\times\) 10\({}^{4}\)**} & \multirow{2}{*}{3.32 \(\times\) 10\({}^{3}\)} & \multirow{2}{*}{373 (3)} & \multirow{2}{*}{2.73 \(\times\) 10\({}^{3}\)} & \multirow{2}{*}{6.71 \(\times\) 10\({}^{3}\)} & **3.60 \(\times\) 10\({}^{3}\)**} & \multirow{2}{*}{177 (3)} & \multirow{2}{*}{146 (66)} \\  & & & **(231)** & & & & & & \\ \hline Fraction F6 & \multirow{2}{*}{33 (3)} & \multirow{2}{*}{141 (47)} & \multirow{2}{*}{8.24 \(\times\) 10\({}^{3}\)} & \multirow{2}{*}{353 (0)} & \multirow{2}{*}{46 (1)} & \multirow{2}{*}{471 (165)} & \multirow{2}{*}{582 (2)} & **4.57 \(\times\) 10\({}^{3}\)**} & \multirow{2}{*}{0 (1)} & \multirow{2}{*}{13 (13)} \\  & & & **(240)** & & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Concentration of fungal aerosol (CFU/m\({}^{3}\)) in the examined horse stables and outdoors. The presented values are means of three replicates. Values in brackets show standard deviation. The highest values within each fraction of bioaerosol are shown in bold.