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Seasonal dynamics of house dust mites in dust samples collected from sleeping places in north-western Poland
D I Kosik-Bogacka1, E Kalisinska, L Henszel
1Department of Biology and Medical Parasitology, Pomeranian Medical University, Szczecin, Poland. kodan@sci.pam.szczecin.pl
Abstract:
The most common families of mites found in house dust are Pyroglyphidae, Glycyphagidae and Acaridae; all are a source of many antigens responsible for allergic diseases. The aim of this study was to examine the seasonal dynamics of allergenic mite populations in dust samples collected from sleeping places in apartments in north-western Poland. The mites were isolated from the dust using a saturated saline floating method. In 132 dust samples we determined: Dermatophagoides farinae, Dermatophagoides pteronyssinus, Euroglyphus maynei, Hirstia sp., Chortoglyphus arcuatus, Lepidoglyphus destructor, Gohieria fusca and Cheyletus sp. The greatest frequency was observed for D. farinae, D. pteronyssinus, Ch. arcuatus and Cheyletus sp., in the fourth quarter and D. farinae in the third quarter. Smaller coefficients of dominance were found for D. pteronyssinus, Ch. arcuatus and Cheyletus sp., and their greatest mean concentrations were found in the first and fourth quarters. Given the division of the year into heating and non-heating seasons, mites D. farinae and D. pteronyssinus achieved the highest mean concentration in the first season, and Cheyletus sp. in the second season. The analysis of the participation of developmental stages showed that the adults of D. farinae were more prevalent than juveniles in the first, second and third quarters, and imago stages of D. pteronyssinus were more numerous in relation to juveniles in the first, third and fourth quarters. The results confirm the high incidence of house dust mites in sleeping places in north-western Poland dwellings; the best conditions for the development of these mites, mainly D. farinae and D. pteronyssinus, occur in the fourth quarter and are the least favourable in the second quarter. In many cases, these results are consistent with data from other parts of Poland collected by various authors.
Insights
House dust mites, common allergens, show seasonal population dynamics in Polish homes. Dermatophagoides farinae and Dermatophagoides pteronyssinus peak in the fourth quarter, indicating specific environmental conditions favor their development.
Area of Science:
- Environmental Science
- Allergology
- Medical Entomology
Background:
- House dust mites (Pyroglyphidae, Glycyphagidae, Acaridae) are significant sources of allergens linked to allergic diseases.
- Understanding mite population dynamics is crucial for managing allergic conditions exacerbated by environmental factors.
Purpose of the Study:
- To investigate the seasonal variations in allergenic mite populations within house dust samples from residential sleeping areas.
- To identify the dominant mite species and their population densities across different seasons in north-western Poland.
Main Methods:
- Mites were extracted from 132 house dust samples using a saturated saline flotation technique.
- Species identification included Dermatophagoides farinae, Dermatophagoides pteronyssinus, and others, with analysis of developmental stages.
- Seasonal and quarterly population dynamics, dominance, and concentration were assessed, considering heating and non-heating periods.
Main Results:
- Dermatophagoides farinae, Dermatophagoides pteronyssinus, Chortoglyphus arcuatus, and Cheyletus sp. were frequently observed, particularly in the fourth quarter.
- Highest mean concentrations for D. farinae and D. pteronyssinus occurred during the first (heating) season, while Cheyletus sp. peaked in the second (non-heating) season.
- Adult mites of D. farinae and D. pteronyssinus were generally more prevalent than juveniles in specific quarters, with optimal mite development observed in the fourth quarter.
Conclusions:
- House dust mites are prevalent in sleeping areas in north-western Poland, confirming a significant presence.
- Seasonal patterns indicate the fourth quarter provides the most favorable conditions for mite development, especially for D. farinae and D. pteronyssinus.
- Findings align with previous studies in other regions of Poland, highlighting consistent mite distribution patterns.
