The benefits of regular exercise include improved physical and mental health. The school gym is a particular micro-environment where students perform intensive physical training. The question is if there is an increased risk of microbiological contamination. This preliminary work studied the exposure of students to bacterial aerosol (BA) in a highschool gym located in an urban area of Southern Poland. A sampling of BA was undertaken with an Andersen six-stage impactor (ANDI). BA was identified using API (analytical profile index) tests. The BA concentrations were expressed as Colony Forming Units (CFU) per cubic metre of air. The results showed that before gym classes (BGC), the concentration of BA was 4.20 × 10² ± 49.19 CFU/m³, while during gym classes (DGC), the level of BA more than doubled (8.75 × 10² ± 121.39 CFU/m³). There was also an increase in the respirable fraction of BA (particles less than 3.3 µm). Before the start of the sports activities, respirable fraction accounted for 30% of the BA, while during physical education classes, this share increased to over 80%. Identification of BA species showed that the dominant group of bacteria in the indoor air of the gym BGC was Gram-positive rods (61%) and for DGC it was Gram-positive cocci (81%). We detected that one bacteria strain (Corynebacterium striatum) was classified into risk group 2 (RG2) according to Directive 2000/54/EC. Additionally, multi-antibiotic resistance (MAR) showed that among the isolated airborne bacteria, the highest antibiotic resistance was demonstrated by Staphylococcus epidermis (isolated DGC) and Pseudomonas sp. (isolated BGC). The quantitative and qualitative information on microbiological air quality (MIAQ) in the school gym indicates that the actions to improve indoor physical activity spaces are recommended.

中文翻译：

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位于波兰南部市区的高中体育馆中微生物空气质量的初步研究

定期运动的好处包括改善身心健康。学校体育馆是一个特殊的微环境，学生可以在其中进行强化的体育锻炼。问题是微生物污染的风险是否增加。这项初步工作研究了波兰南部市区一所高中体育馆中学生接触细菌气溶胶（BA）的情况。使用安德森六级撞击器（ANDI）对BA进行了采样。BA是使用API​​（分析配置文件索引）测试确定的。BA浓度表示为每立方米空气中的菌落形成单位（CFU）。结果表明，在体育课（BGC）前，BA的浓度为4.20×10 ² ±49.19 CFU / m ^3。，而在体育课（DGC）期间，BA的水平增加了一倍以上（8.75×10 ² ±121.39 CFU / m ³）。BA的可呼吸部分（小于3.3 µm的颗粒）也有所增加。在体育活动开始之前，可呼吸部分占学士学位的30％，而在体育课中，这一比例增加到80％以上。对BA物种的鉴定表明，健身房BGC室内空气中的主要细菌群是革兰氏阳性棒（61％），而DGC则是革兰氏阳性球菌（81％）。我们检测到一种细菌菌株（Corynebacterium striatum）根据指令2000/54 / EC分为危险组2（RG2）。此外，多种抗生素耐药性（MAR）显示，在分离出的空气传播细菌中，表皮葡萄球菌（分离的DGC）和假单胞菌sp。表现出最高的抗生素耐药性。（隔离的BGC）。学校体育馆中有关微生物空气质量（MIAQ）的定量和定性信息表明，建议采取改善室内体育活动空间的措施。