期刊名称：Annals of Agricultural and Environmental Medicine
印刷版ISSN：1232-1966
电子版ISSN：1898-2263
出版年度：2019
卷号：26
期号：4
页码：1-11
DOI：10.26444/aaem/112381
出版社：Institute of Agricultural Medicine in Lublin
摘要：Objective. The aim of this study was to assess microbial contamination of the air and surfaces at workplaces in commercial
(CD) and traditional (TD) dairies.
Materials and method. Bioaerosol (impactor) and surface (swab) samples were collected in CD and in TD. Bacterial and
fungal concentrations in the air and on surfaces were calculated and all isolated microorganisms taxonomically identified,
based on their morphological, biochemical and molecular features.
Results. Average concentrations of bacterial aerosol ranged between 70–860 CFU/m3
and 265–14639 CFU/m3
, while for fungal
aerosol were between 50–290 CFU/m3
and 55–480 CFU/m3
in CD and TD, respectively. Average bacterial concentrations on
surfaces ranged between 1.0–49.7 CFU/cm2
and 0.2–60.4 CFU/cm2
, whereas average fungal surface contamination ranged
between 0–2.7 CFU/cm2
and 0–4.6 CFU/cm2
in CD and TD, respectively. Qualitative analysis revealed mainly the presence
of saprophytic microorganisms; however, several pathogenic strains (Staphylococcus aureus, Streptococcus intermedius,
Clostridium perfringens, Actinomyces spp., Streptomyces spp., Candida albicans) were also isolated from both the air and
surface samples in the studied dairies.
Conclusions. The air and surfaces in TD were more polluted than those in CD; however, in both types of dairies, the levels
of microbial contaminants did not exceed respective threshold limit values. Nevertheless, the presence of pathogenic
microorganisms may increase health risk for dairy workers and influence the quality of products. Hence, proper hygienic
measures should be introduced and performed to guarantee high microbial quality of both production processes and
milk products.
