Abstract The study was aimed at evaluating microbial contamination on the premises of the sewage treatment plant by determining the concentrations of selected groups of airborne microorganisms. Another objective was to determine the antibiotic sensitivity patterns of isolated strains of staphylococci. The research was conducted in a seasonal cycle, by the impaction method using Merck MAS-100 air sampler. Samples were collected at six sites, each representing a different stage of sewage treatment. The susceptibility of isolated staphylococci was assessed with the disc-diffusion method, following the recommendations of the EUCAST. The results indicate that the microbial population in the air of the investigated area was dominated by mold fungi, whose highest average concentration was recorded at site IV located near the final clarifier (7672 CFU•m-3). Heterotrophic bacteria and mannitol-positive staphylococci were the most numerous at locations where sewage undergoes primary treatment. In each subseuqent stage the number of microorganisms emitted into the air from the sewage was lower. Antibiograms show that more than 50% of Staphylococcus spp. exhibited resistance to penicillin and 20% to rifampicin. In addition, 90% of the analyzed strains were sensitive to other antibiotics. The fungal community included the following genera: Cladosporium, Fusarium, Alternaria, Penicillium, Aspergillus, Aureobasidium, and Acremonium.The highest air contamination with all studied groups of microorganisms was recorded at the locations where mechanical sewage treatment was performed. During the subsequent stages lower numbers of heterotrophic bacteria were emitted into the air. The air in the investigated sewage treatment plant did not contain multidrug-resistant staphylococci.

中文翻译：

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比得哥什（波兰）污水处理厂内的微生物空气污染和葡萄球菌属的抗生素抗性。

摘要 本研究旨在通过确定选定的空气传播微生物群的浓度来评估污水处理厂场所的微生物污染。另一个目的是确定分离的葡萄球菌菌株的抗生素敏感性模式。该研究是在季节性周期中通过使用默克 MAS-100 空气采样器的撞击方法进行的。在六个地点收集样品，每个地点代表污水处理的不同阶段。根据 EUCAST 的建议，使用圆盘扩散法评估分离的葡萄球菌的敏感性。结果表明，调查区空气中微生物种群以霉菌为主，其最高平均浓度记录在位于最终澄清池附近的站点 IV (7672 CFU•m-3)。在污水经过初级处理的地方，异养细菌和甘露醇阳性葡萄球菌数量最多。在随后的每个阶段，从污水中排放到空气中的微生物数量都较少。抗菌谱显示，超过 50% 的葡萄球菌属。表现出对青霉素和 20% 对利福平的耐药性。此外，90% 的分析菌株对其他抗生素敏感。真菌群落包括以下属：枝孢属、镰刀菌属、链格孢属、青霉属、曲霉属、金芽孢杆菌属和枝顶孢属。所有研究的微生物组的最高空气污染记录在进行机械污水处理的位置。在随后的阶段，较少数量的异养细菌被排放到空气中。被调查污水处理厂空气中不含耐多药葡萄球菌。