Studies on the house dust mites of India and their role in causation of bronchial asthma and allergic rhinitis — Part I. The mites

Dar, Natasha; Gupta, Virendra K.

doi:10.1080/00305316.1979.10433620

Cited by 6 publications

(4 citation statements)

References 22 publications

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“…In India, house dust mites were found to be abundant from July to September, and in Czechoslovakia from July through Novem ber [13,14]. This is in agreement with our findings in Israel.…”

Section: Discussionsupporting

confidence: 91%

House Dust Mites and Vernal Keratoconjunctivitis

Mumcuoglu¹,

Zavaro

Samra

et al. 1988

Ophthalmologica

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The possible causative relationship between exposure to house dust mite allergen (HDMA) and symptoms of vernal keratoconjunctivitis (VKC) was investigated. VKC patients were evaluated for an average of 18 months using patient reports of symptoms, physicians’ observations and assays of sera and tears for total and specific IgE to 10 inhalant allergens common in Israel, including HDMA. Tear and serum samples from a group of 8 patients reacted only with HDMA, and were compared with the tear and serum samples of a group of 11 patients not reacting to any of the above allergens. House dust samples from the homes of two VKC patients in the HDMA-reactive group were examined monthly for a year. While mites were detected throughout the year, they were approximately 3 times more abundant from June through September than at other times. 96.6% of the mites collected belonged to the family Pyroglyphidae; 91.0% were Dermatophagoides pteronyssinus and 5.5% Dermatophagoides farinae. Both the severity of VKC symptoms in HDMA-reactive patients and mite population levels peaked simultaneously in the summer. This relationship was not seen among the non-HDMA-reactive patients. Our results suggest that exposure to HDMA plays an important role in the aggravation of VKC symptoms in HDMA-reactive patients.

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“…In India, house dust mites were found to be abundant from July to September, and in Czechoslovakia from July through Novem ber [13,14]. This is in agreement with our findings in Israel.…”

Section: Discussionsupporting

confidence: 91%

House Dust Mites and Vernal Keratoconjunctivitis

Mumcuoglu¹,

Zavaro

Samra

et al. 1988

Ophthalmologica

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“…However, most workers throughout the world (Dar and Gupta 1979;Dar et al 1974;Lang and Mulla 1978;Bronswijk 1981;Ranganath and ChannaBasvanna 1988;Banerjee 1988) reported that peak populations occur during different seasons of the year other than March-May and October. Apparently, it seems that mite population and incidence of disease did not always coincide.…”

Section: Discussionmentioning

confidence: 99%

Seasonal prevalence of allergenic mites in house dust of Kolkata Metropolis, India

2008

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During the past few decades, house dust mites have attracted worldwide interest among medical entomologists and acarologists because of their importance in causing nasobronchial allergic disorders in human beings. House dust mites are present throughout the year; however, their relative densities differ in different seasons and habitats. Because the prevalence of house dust mite allergen is important epidemiologically and clinically, detailed knowledge on the seasonal abundance of important allergenic mites is of great importance for better understanding of the pathogenesis of the disease. In view of this, a systematic survey was carried out on the prevalence of total mites and four common allergenic mites in the city of Kolkata for two consecutive years. Both bed and bedroom floor dust were collected separately from homes inhabited by asthmatic patients situated in different corners of the city on monthly basis from January 2004 to December 2005. The population levels of total mites and four common allergenic mites, namely Dermatophagoides pteronyssinus, D. farinae, Austroglycyphagus geniculatus, and Blomia tropicalis separately, were highest during the pre-monsoon period (March-May), irrespective of habitat, whereas densities were low in all cases during winter (December-February). The study indicates that season had the most significant effect on the relative abundance of house dust mites except Dermatophagoides farinae, irrespective of habitat.

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“…Observations on seasonal variation in mite population were also made from time to time in India. Dar et al (1974) and Dar and Gupta (1979) reported that the mite density reached its peak in months of August and September and declined during March to May. Ranganath and ChannaBasavanna (1988) observed maximum mite population in September and December and minimum in March-July.…”

Section: Discussionmentioning

confidence: 97%

Seasonal Variations in Synanthropic Mite Community of Calcutta, India

2011

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Synanthropic acarine populations, especially house dust mites are considered as a major source of allergen responsible for different allergic manifestations. Considering the manifold importance of synanthropic mites, knowledge on the seasonal population structure of this mite fauna is of primary importance for the better understanding of the disease prevalence and pathogenesis. However, very little is known on the seasonal population structure of this ecologically well defined group of mites in Indian context. In the present communication, ecological observations on the seasonal population structure of this group of mites were made with special reference to house dust mites which forms a major component of synanthropic mite community. To fulfill the objective, bedroom floor dust were collected and processed from 60 selected houses in and around Kolkata metropolitan areas during four distinct seasons (winter, spring, summer and autumn) for two consecutive years. Floor dust were collected by sweeping the floor and brought to the laboratory in polythene packet for further analysis. On analyzing the season-wise data, it was noted that the average number of total mite was highest in summer and lowest in spring; Pyroglyphids were highest in summer and lowest in winter; Glycyphagids were highest in autumn and lowest in spring. The study indicates that a temperature of 25-30°C and relative humidity between 65 and 75% were optimum for the successful growth and multiplication of these mites.

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Studies on the house dust mites of India and their role in causation of bronchial asthma and allergic rhinitis — Part I. The mites

Cited by 6 publications

References 22 publications

House Dust Mites and Vernal Keratoconjunctivitis

House Dust Mites and Vernal Keratoconjunctivitis

Seasonal prevalence of allergenic mites in house dust of Kolkata Metropolis, India

Seasonal Variations in Synanthropic Mite Community of Calcutta, India

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