Feeding Interactions Between Microorganisms and the House Dust Mites Dermatophagoides pteronyssinus and Dermatophagoides farinae (Astigmata: Pyroglyphidae)

2019 ◽  
Vol 56 (6) ◽  
pp. 1669-1677 ◽  
Author(s):  
Vit Molva ◽  
Marta Nesvorna ◽  
Jan Hubert
Keyword(s):  
Population Growth ◽  
House Dust ◽  
Dermatophagoides Pteronyssinus ◽  
Mite Species ◽  
Fungal Species ◽  
House Dust Mites ◽  
Dust Mites ◽  
Dermatophagoides Farinae ◽  
Microbial Species ◽  
Feeding Interactions

Abstract The feeding interactions between house dust mites (HDM) and microorganisms are key factors in the survival of mites in human environments. The suitability of different microbes for HDM is not known. Here, microbial species isolated from HDM cultures were offered to HDM in food preference tests under laboratory conditions. The microbial species were added to the rearing diet of mites to reach 7% of Saccharomyces cerevisiae and 10% of each tested microorganism. The suitability of each microbe-supplemented diet for Dermatophagoides pteronyssinus and Dermatophagoides farinae was compared in terms of mite population growth and mite preference in a cafeteria test. The effect of mite feeding on the respiration of microorganisms in the diet was observed in microcosms. HDM were able to feed and reproduce on some bacterial and fungal species, but the suitability of microbial species differed. Increasing the yeast Sa. cerevisiae in the diet from 7 to 17% appeared the most suitable for both mite species. Staphylococcus spp. bacteria were preferred for D. farinae and were suitable for reproduction. The population growth and feeding preferences of D. pteronyssinus and D. farinae with respect to microorganisms indicate that D. farinae can develop on a diet with bacterial (Staphylococcus nepalensis and Staphylococcus kloosii) additions, whereas D. pteronyssinus was successful on a diet with fungal (Aspergillus jensenii and Aspergillus ruber) additions. The bacteria Kocuria rhizophila and Bacillus cereus decreased population growth in D. pteronyssinus, whereas the yeasts Hyphopichia pseudoburtonii, Hyphopichia burtonii, and Candida ciferrii decreased population growth in D. farinae. These results indicate that some microorganisms are an important food source for HDM.

The Influence of Indoor Environmental Factors on the Prevalence of House Dust Mites as Aeroallergens in Bandar Abbas Student Dormitories, South of Iran, 2019

2021 ◽  
Author(s):  
Mehdi Zare ◽  
Mehdi Hassani-Azad ◽  
Moussa Soleimani-Ahmadi ◽  
Raziea Majnoon
Keyword(s):  
Environmental Factors ◽  
House Dust ◽  
Dermatophagoides Pteronyssinus ◽  
House Dust Mites ◽  
Dust Mites ◽  
Dermatophagoides Farinae ◽  
Floor Covering ◽  
The Mean ◽  
Bandar Abbas ◽  
Cheyletus Malaccensis

Abstract This study was conducted to determine the influence of environmental factors on the prevalence of house dust mites in student dormitories of Bandar Abbas city. In this study, 64 dust samples were collected from seven randomly selected dormitories located in various areas of the Bandar Abbas. The collected mites were isolated and mounted in Hoyer’s medium and identified using a morphological key. The associations between the environmental factors and the density of house dust mites were investigated. In total, 1,093 adult mites were collected and identified. They consisted of four species including Dermatophagoides pteronyssinus Trouessart (57.6%), Dermatophagoides farinae Hughes (24.3%) and Dermatophagoides evansi Fain (14.9%) (Acari: Pyroglyphidae), and Cheyletus malaccensis Oudemans (3.2%) (Acari: Cheyletidae). All of the dormitories were contaminated by more than one house dust mites species and the mean density of house dust mites in dormitories was 8.3 ± 0.2 mites/g of dust. There was a significant relationship between average house dust mites density and some of environmental factors such as relative humidity, temperature, floor covering type, and number of occupants (P < 0.05). Results of this study revealed that two major allergenic dust mites, D. pteronyssinus and D. farinae, were the most prevalent and collected from all of dormitories and some of indoor environmental factors found to influence mites’ population.

scholarly journals IgE-dependent reactivity of canine sera from three regions of Poland

2020 ◽  
Vol 76 (06) ◽  
pp. 6410-2020
Author(s):  
BARTOSZ JANIA ◽  
MARTA DOPIERAŁA ◽  
EWA WÓJCIK ◽  
KATARZYNA RYMUZA ◽  
KATARZYNA ANDRASZEK
Keyword(s):  
House Dust ◽  
Genetic Predisposition ◽  
Dermatophagoides Pteronyssinus ◽  
House Dust Mites ◽  
Allergic Reactions ◽  
Dust Mites ◽  
Dermatophagoides Farinae ◽  
Acarus Siro ◽  
Study Support ◽  
Health Complications

Allergies in dogs have become a relatively frequent topic of discussion in veterinary surgeries. Many dogs, both purebred and of mixed breeds, are diagnosed for allergies. Allergies have many causes, from genetic predisposition to the environmental conditions in which the animal lives. Allergies in dogs are troublesome because they can lead to serious health complications when diagnosed late or left untreated. The results of the study support the hypothesis that the percentage of allergies to individual allergens varied by region (Tab. 4). Differences were observed in the case of Dermatophagoides pteronyssinus and Dermatophagoides farinae house dust mites, Acarus siro, and Tyrophagus. The remaining allergens caused allergic reactions in similar percentages of dogs from northern, central and southern Poland.

scholarly journals House Dust Mites in One of Indonesian Detention Center in 2020

Biomedika ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 98-103
Author(s):  
Ajrina Malia ◽  
Makhabbah Jamilatun ◽  
Aminah Aminah
Keyword(s):  
House Dust ◽  
Descriptive Study ◽  
Dermatophagoides Pteronyssinus ◽  
House Dust Mites ◽  
Dust Mites ◽  
Dermatophagoides Farinae ◽  
Detention Center ◽  
Home Furnishings ◽  
Dust Mite ◽  
Flotation Method

House dust mite was one of the most common allergens in homes around the world and associated with manifestations of allergies of skin and respiratory tract such as bronchial asthma, allergic rhinitis, and atopic dermatitis. This arthropod was commonly found on carpets, mattresses, children's toys, and other home furnishings. This study was aimed to identify and quantify the number of Dermatophagoides spp in Detention Center. This descriptive study was conducted using flotation method on 52 samples of mattress dust collected in February 2020. The results showed that 49 out of 52 mattress dust samples were positive of Dermatophagoidesspp..Of all Dermatophagoides spp, there were Dermatophagoides pteronyssinus (71.2%) and Dermatophagoides farinae (28.8%). In conclusion, this study found two species of Dermatophagoides spp. in Detention Center and suggested that the fascility maintain the cleanliness of the mattress by drying the mattress and changing the sheets at least once a week.

scholarly journals 96 Sublingual allergen-specific immunotherapy in pediatric patients: biomarkers and molecular allergy diagnostics as predictors of therapeutic success

2020 ◽  
Vol 25 (Supplement_2) ◽  
pp. e40-e40
Author(s):  
Lala Allahverdiyeva ◽  
G E Agaragimova ◽  
Veronica Mugarab Samedi
Keyword(s):  
House Dust ◽  
Pediatric Patients ◽  
Specific Immunotherapy ◽  
Dermatophagoides Pteronyssinus ◽  
House Dust Mites ◽  
Healthy Children ◽  
Dust Mites ◽  
Dermatophagoides Farinae ◽  
Allergen Specific Immunotherapy ◽  
Molecular Allergy

Abstract Background Efficacy of allergen-specific immunotherapy (ASIT) in patients with asthma could be significantly enhanced when physicians have an opportunity to identify those who are most likely to respond, determine when to stop treatment, and predict relapse. Thus, molecular allergy diagnostic is an effective tool that could help to individualize the diagnosis and treatment of asthma by accurate detection of the causative and cross-reactive allergens in pediatric patients. Cytokines are known as reliable diagnostic and prognostic biomarkers for asthma and can be used to evaluate the therapeutic effect. Objectives To evaluate the roles of molecular allergy diagnostic and biomarkers (L-10, IFNγ и TGFβ) as predictors of ASIT efficacy in pediatric patients with asthma. Design/Methods Eighty children aged 5 to 18 years with mild and moderate atopic bronchial asthma were included in the study. Sixty-eight out of 80 (85%) were found to have sensitization to house dust mites Dermatophagoides Pteronyssinus and/or Dermatophagoides Farinae. All these patients underwent molecular diagnostics using ImmunoCAP (Phadia 100) to determine the major (r Der p1, r Der p 2) and minor allergens (r Der p10) of the house dust mites. Twenty-eight patients with mild and moderate asthma were found to have a high sensitivity to these allergens and received SLIT with a mixture of house dust mites (Dermatophagoides Pteronyssinus and/or Dermatophagoides Farinae). To compare the efficacy of SLIT, we evaluated the severity of asthma clinical symptoms on a point scale from 0 to 3, and biomarker levels (IL-10, IFNγ и TGFβ) before and 6 months after SLIT. Twelve healthy children were included in the study as a reference group. Results At the beginning of the study, the average daily score in the SLIT group of 2.5 ± 0.7, and after 6 months of treatment, it decreased to 0.5 ± 0.2. The levels of biomarkers were markedly decreased prior to the treatment, especially TGFβ levels, and normalized at the end of treatment (Tab.1). Conclusion These findings support the efficacy of molecular diagnosis to determine the efficacy of allergen-specific immunotherapy in patients with asthma.

scholarly journals HUBUNGAN KEPADATAN DERMATOPHAGOIDES SPP. DENGAN FREKUENSI SERANGAN ASMA PADA PENDERITA ASMA DI RS PARU JEMBER

2019 ◽  
Vol 19 (2) ◽  
Author(s):  
Denaneer Rahmadatu ◽  
Erma Sulistyaningsih ◽  
Dini Agustina
Keyword(s):  
House Dust ◽  
Random Sampling ◽  
Simple Random Sampling ◽  
Dermatophagoides Pteronyssinus ◽  
House Dust Mites ◽  
Inflammatory Disorder ◽  
Dust Mites ◽  
Dermatophagoides Farinae ◽  
Cross Sectional ◽  
Asthmatic Patients

Abstrak. Asma merupakan gangguan inflamasi kronik saluran napas yang bersifat hiperesponsif yang ditandai adanya gejala episodik berulang berupa mengi, sesak napas, dada terasa berat, dan batuk, terutama pada malam hari atau dini hari. Sekitar 50-80% asma disebabkan oleh tungau debu rumah (TDR), khususnya Dermatophagoides pteronyssinus dan Dermatophagoides farinae. Penelitian ini bertujuan untuk mengetahui apakah terdapat hubungan antara kepadatan Dermatophagoides spp. pada debu rumah dengan frekuensi serangan asma pada penderita asma di RS Paru Jember. Penelitian ini merupakan penelitian analitik observasional dengan desain penelitian cross-sectional. Sampel penelitian ini yaitu 30 penderita asma di RS Paru Jember yang diambil menggunakan teknik simple random sampling sesuai dengan kriteria inklusi dan eksklusi. Peneliti melakukan interview mengenai frekuensi serangan asma dalam tiga bulan terakhir, mengambil debu dari ruang tamu dan ruang tidur pada rumah penderita asma, dan mengidentifikasi tungau debu rumah (TDR) yang ditemukan pada debu. Hasil uji Pearson mendapatkan nilai p=0,011 dan nilai r=0,475 sehingga dapat disimpulkan bahwa terdapat hubungan bermakna antara kepadatan Dermatophagoides spp. dengan frekuensi serangan asma dengan kekuatan korelasi sedang pada penderita asma di RS Paru Jember. Kata Kunci: Dermatophagoides spp., Tungau Debu Rumah (TDR), Asma Abstract. Asthma is a chronic inflammatory disorder of the respiratory system characterized by recurrent episodes of wheezing, shortness of breath, chest tightness, and cough, particularly at night or early morning. About 50-80% of asthma is caused by house dust mite (HDM), especially Dermatophagoides pteronyssinus and Dermatophagoides farinae. This study aimed to investigate the correlation between the density of Dermatophagoides spp. and the frequency of asthma attacks in asthmatic patients at Jember Pulmonary Hospital. This study was an observational analytic study with a cross-sectional design. Respondents were 30 asthmatic patients at Jember Pulmonary Hospital matched with inclusion and exclusion criteria and chose by simple random sampling. Respondents were interviewed about the frequency of asthma attacks in the last three month,s and the hose dust from the living and sleeping rooms were collected for identification of house dust mites (HDM). The pearson test showed a value of p=0.011 and r=0.475. It can be concluded that there is a significant correlation with the moderate strenght between the density of Dermatophagoides spp. and the frequency of asthma attacks in the asthmatic patient at Jember Pulmonary Hospital. Keywords: Dermatophagoides spp., House Dust Mites (HDM), Asthma

scholarly journals JENIS DAN KEPADATAN TUNGAU DEBU RUMAH PADA BEBERAPA HABITAT DI RUMAH PENDERITA PENYAKIT ALERGI

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Wiska F. Ponggalunggu ◽  
Victor D. Pijoh ◽  
Greta J. P. Wahongan
Keyword(s):  
House Dust ◽  
House Dust Mite ◽  
Allergic Diseases ◽  
Dermatophagoides Pteronyssinus ◽  
House Dust Mites ◽  
Dust Mites ◽  
Dermatophagoides Farinae ◽  
Cross Sectional ◽  
Dust Mite ◽  
Euroglyphus Maynei

Abstract. House dust mites are the most found allergens in homes scattered throughout the world that associated with allergic manifestations in the respiratory tract and skin, such as bronchial asthma, allergic rhinitis and atopic dermatitis. The most common house dust mite is from the family Pyroglyphidae, four of which have a close relationship with the incidence of allergy: Dermatophagoides pteronyssinus, Dermatophagoides farinae, Dermatophagoides microceras, and Euroglyphus maynei. This study aims to determine the type and density of house dust mites in several habitats in the homes of people with allergic diseases. This study is a descriptive study using cross-sectional method. Samples were dust in allergic patient’s home in Malalayang I, taken from three habitats, namely bed (mattress and bed linen), bedrooms floor and sofa, as many as 96 samples. Of the 96 samples, there are 60 samples positive of dust mites and 36 negative samples. This study found 157 mites (124 adults and 33 larvae mites). Of the 124 adult mites were identified, there are 122 from order Astigmata with the dominant species is Dermatophagoides pteronyssinus, and two others of the order Prostigmata. In each habitat that is in the bed (mattress and bed linen), bedrooms floor and sofa, Pyroglyphidae is the most prevalent.Keywords: house dust mite, allergiesAbstrak. Tungau debu rumah (TDR) adalah alergen dalam rumah terbanyak yang tersebar di seluruh dunia yang dikaitkan dengan manifestasi alergi pada saluran pernapasan dan kulit, seperti asma bronkial, rinitis alergi dan dermatitis atopik. TDR yang paling sering ditemukan adalah dari famili Pyroglyphidae, empat di antaranya memiliki hubungan yang erat dengan kejadian alergi: Dermatophagoides pteronyssinus, Dermatophagoides farinae, Dermatophagoides microceras, dan Euroglyphus maynei. Penelitian ini bertujuan untuk mengetahui jenis dan kepadatan tungau debu rumah pada beberapa habitat di rumah penderita penyakit alergi. Penelitian ini adalah penelitian deskriptif dengan menggunakan metode cross-sectional. Sampel penelitian adalah debu di rumah penderita alergi di Kelurahan Malalayang I yang diambil dari 3 habitat, yaitu tempat tidur (kasur dan sprei), lantai kamar tidur, dan sofa sebanyak 96 sampel. Dari 96 sampel, 60 sampel positif tungau debu dan 36 sampel negatif. Pada penelitian ini ditemukan 157 tungau (124 tungau dewasa dan 33 larva). Dari 124 tungau dewasa yang terindentifikasi, dari ordo Astigmata sebanyak 122 dengan spesies yang dominan adalah Dermatophagoides pteronyssinus, dan dua lainnya dari ordo Prostigmata. Pada masing-masing habitat yaitu di tempat tidur (kasur dan sprei), lantai kamar tidur dan sofa, famili Pyroglyphidae paling banyak ditemukan.Kata kunci: tungau debu rumah, alergi

scholarly journals The house dust mites significance in the development of atopy

2018 ◽  
Vol 15 (3) ◽  
pp. 30-34
Author(s):  
S Yu Petrova ◽  
S V Khlgatian ◽  
V M Berzhets
Keyword(s):  
Blood Serum ◽  
House Dust ◽  
Background Knowledge ◽  
Dermatophagoides Pteronyssinus ◽  
Moscow Region ◽  
House Dust Mites ◽  
Dust Mites ◽  
Dermatophagoides Farinae ◽  
Treatment And Prevention ◽  
Observation Period

Background. Knowledge of the structure and particularity of sensitization in the region allows us to choose the correct tactics of treatment and prevention of atopic reactions. Objective. To study the structure of sensitization to inhalation allergens in Moscow and Moscow region since 2009 to 2017 and to determine significance of sensitization to house dust mites Dermatophagoides pteronyssinus (Der p) and Dermatophagoides farinae (Der f) in it. Methods. Blood serum of Moscow region patients with atopy (n=2546) was examined by RIDA AllergyScreen method in the period from 2009 to 2017. Results. The allergosensitisation structure was determined. It was revealed that there was no decreasing of the frequency of house dust mites (Der р and Der f) sensitization in observation period. The features of monovalent, polyvalent and combined sensitization among patients with IgE reactions to Der р and Der f were analyzed. Conclusions. According to our research 20% of patients with atopy in Moscow region have sensitization to Der р and/or Der f. The percentage of allergosensitisation to Der р is higher than to Der f. Most often house dust mites sensitization combined with pollen sensitization.

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