Václav Stejskal

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The pest potential of stored product mites depends on the reproduction rate that is affected by the environmental conditions. In this study we investigated the effect of temperature, ranging from 5 to 35°C, on the population growth of three important mite species, Acarus siro, Tyrophagus putrescentiae and Auleroglyphus ovatus at 85% r.h. Starting with 10(More)
The sensitizing properties of metals widely used in medical and dental care have been studied with the help of an optimized lymphocyte proliferative assay, MELISA. MELISA (memory lymphocyte immuno-stimulation assay) was originally developed for the screening of allergenic epitopes of drugs and other chemicals of low molecular weight, but has recently been(More)
Twenty-five workers with clinically diagnosed or suspected occupational hypersensitivity caused by contact with bacampicillin, alprenolol, and/or quinidine were studied by the lymphocyte transformation test and by skin tests. Ten healthy exposed workers, 16 job applicants, and seven healthy nonexposed laboratory workers served as control subjects.(More)
Mites are well documented as vectors of micromycetes in stored products. Since their vectoring capacity is low due to their small size, they can be serious vectors only where there is selective transfer of a high load of specific fungal species. Therefore the aim of our work was to find out whether the transfer of fungi is selective. Four kinds of stored(More)
Toxigenic and allergen-producing fungi represent a serious hazard to human food and animal feed safety. Ninety-four fungal species were isolated from mite-infested samples of seeds taken from Czech seed stores. Fungi were isolated from the surface of four kinds of seeds (wheat, poppy, lettuce, and mustard) and from the gut and external surface of five(More)
Psocids are serious storage pests, and their control is hampered by the fact that different species respond differently to insecticides used for the control of stored-product insect pests. Additionally, psocids of genus Liposcelis that are commonly associated with stored-products are difficult to identify using morphological characteristics. The goal of(More)
BACKGROUND The efficacies of organophosphate pesticides, single-compound versus multicompound pyrethroid formulations and relatively novel unclassified insecticides/acaricides were compared to find the lowest dosage and highest efficacy for the control of Dermatophagoides farina (Hughes), D. pteronyssinus (Trouessart) and Tyrophagus putrescentiae (Schrank).(More)
The lymphocyte transformation test (LTT) has been used for evaluation of in vitro lymphocyte responses in 18 patients with dermatitis and positive patch tests to 200 ppm of a combination of 5-chloro-2-methylisothiazolinone and 28methylisothiazolinone (MCI) in nine patients with dermatitis unrelated to MCI and in seven subjects without skin diseases. Two(More)
Eight workers with clinically diagnosed or suspected occupational allergy caused by penicillins were studied by the lymphocyte transformation test (LTT) and by skin test. The majority of the workers handled bacampicillin, some of them had been in contact with benzylpenicillin and one worked with azidocillin only. Six workers had eczema and 2 workers(More)
Arthropods are a documented cause of occupational allergy in cereal stores. Since the current allergenic risk of various arthropods in grain stores is not known, we evaluated its extent using data from the Czech Republic (CZ). We surveyed 514 grain storage units for pest composition and density. Recalculating literature data we established 4 density(More)