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... Three important phytopathogenic spores which cause serious fungal diseases on vines (Botrytis, Uncinula andPlasmopara) were monitored from June 2, 1994 to September 21, 1994, in vineyards belonging to ‘Estación de Enoloxía e Viticultura’ of Ponte San Clodio-Leiro (Ourense), one of the most important vine growing areas of northwest of Spain. The concentrations for each of the genera were correlated ...
flowering; flowers; pollen; spring; summer; surveys; temperature; trees; winter; Argentina
Abstract:
... An atmospheric pollen survey and a periodical quantitative check of the flowering phases of trees were performed during 1993. Most of specific flowering seasons lasted from 4 to 8 weeks. October is the month with the highest number of species in bloom. Anemophylous species flower mainly in coincidence with the relatively low temperatures of late winter and early spring, while the enthomophylous on ...
... A chamber was designed and constructed for aeromicrobiology applications. An ultraviolet (UV) radiation source was incorporated to sterilize the chamber between trials. Twelve bacterial species originally isolated from air samples and obtained from the American Type Culture Collection were tested for efficacy of UV radiation disinfection of the chamber, comprising five Gram-positive bacteria, six ...
grasses; linear models; pollen; prediction; rain; regression analysis; seasons; spore traps; temperate zones; Australia
Abstract:
... In Melbourne, a southern hemisphere city with a cool temperate climate, the grass pollen season has been monitored using a Burkard spore trap for 12 years (11 pollen seasons, which extend from October through January). The onset of the grass pollen season (OGPS) has been defined in various ways using both arbitrary cumulative scores (Sum 75, Sum 100) and percentages (10% Pollen Fly). OGPS, based o ...
allergens; fungi; medical history; mycobiota; patients; respiratory system; testing
Abstract:
... In order to clarify the aetiological role of fungi in determining allergic diseases, we evaluated the correlation between the positive skin test response to fungal allergens and the presence of the same species in the upper respiratory tract in 193 patients with suspected allergic disease to fungi. The results of our study have shown that the isolation and identification of the fungal flora from t ...
... Thirty homes of asthmatic adults located in Mexico City were examined to determine the predominant culturable fungi and the changes in their airborne concentrations. Fungi were cultured and identified microscopically from air samples collected in naturally ventilated homes, during both wet (July–August) and cool dry (November–December) seasons, and from settled dust from the same homes. Airborne d ...
air; coasts; pollen; pollen flow; spore traps; trees; Alaska; Beaufort Sea; Canada; Gulf of Mexico; Hudson Bay
Abstract:
... At Kuujjuarapik, on the eastern coast of Hudson Bay (Canada), thermophilic tree pollens, all of long distance origin, are found in low concentrations, but throughout the pollen season. A Cour impaction pollen trap has allowed us to obtain statistically significant concentrations. The analysis of the origins of synchronous air masses by back-trajectories shows that the weekly variations of thermoph ...
... The common methods for analyzing bioaerosols are based on maintaining organism viability and quantifying culturability which may result in the underestimation of microbial concentrations. The present study employed a well-developed technique that only requires cellular DNA to identify organisms. Polymerase chain reaction (PCR) was chosen to amplify specific DNA sequence from an organism, to detect ...
... The aim of this study, was to determine the prevalence of some respiratory symptoms and possible diseases among taxi drivers and manual workers. This prospective study was performed on 165 Pakistani male drivers, (mean age: 34.5±7.8 years) and 165 Pakistani male manual workers not exposed to dust or fumes, without occupational exposure to driving employed in the Water and Electricity Department an ...
Pinus; autumn; correlation; pollen; rain; temperature; Australia
Abstract:
... Relationships between weather parameters andairborne pollen loads of Pinus inBrisbane, Australia have been investigated overthe five-year period, June 1994–May 1999.Pinus pollen accounts for 4.5% of the annualairborne pollen load in Brisbane where thePinus season is confined to the winter months,July–early September. During the samplingperiod loads of 11–>100 grains m³ wererecorded on 24 days and ...
Castanea; Olea; air; correlation; data collection; flowering; pollen; rain; temperature; Portugal
Abstract:
... The variation in airborne pollen concentrationof the Braga region (Portugal) was studied inspringtime, during the flowering of Vitisvinifera. The data set was obtained for twoconsecutive years (1999 and 2000), using aCour-type sampler.During this period, thirty-six taxa wereobserved in a total of 3,200 pollengrains m⁻³ of air (CPA). The main pollentypes observed were Olea, Poaceaea,nd Castanea, re ...
... To describe the season of airborne pollen ofbirch and grass in the city of Nuuk, Greenland,pollen concentrations were measured dailythroughout the pollen seasons in 1997 to 1999.The study was part of a large epidemiologicalcross-sectional study of allergy and riskfactors for allergy in Greenlander Inuit livingin Greenland and Denmark.For the three years the mean birch pollenseason started around 8 ...
... People's sensitivity to allergies may representone of the most important health factors of thenext century to which attention must be paid inorder to reduce the incidence of social costsand improve the quality of life.Taking into consideration the earnest requestsof the medical-scientific communityEmilia-Romagna ARPA (Regional Agency for thePrevention of the Environment) moved theattention from th ...
... Research was carried out onthe presence and variation in occurrence offungal genera in air and on plant samplescollected from three different climatic regionsin Croatia in relation to temperature andrelative humidity throughout one year (1998).The sampling method employed in this study wasexposure of 150 Sabouraud agar plates withantibiotics to the air for 10 min. and byplacing 10 pieces of each p ...
... For the first time, a volumetric study ofBuenos Aires city atmosphere was conductedusing a Lanzoni collector from March 1997through March 1998. Fifty-four pollen typeswere recorded of which 13 had a relativeconcentration of more than 1% of the yearlytotal. The lowest concentration of pollengrains was recorded in June, when Urticas,pp., Morus spp., and Myrtaceae were low.On the other hand, the high ...
... The use of a double-sided self-adhesive tapefor pollen trapping could offer some advantagesover traditional adhesives, manually applied tothe Melinex tape of a Hirst-type spore trap,since variation in terms of adhesiveapplication is nil and additional effort inapplying the adhesive is avoided. Nevertheless,its efficiency with respect to the standardadhesives must be tested. In Cordoba (southwestSp ...
... The aerobiological behaviour of Fagaceae in Trieste and the correlations with the meteorological parameters were examined. Airborne pollen grains of Castanea, Fagus and Quercus were collected from 1990 to 2003 using a Hirst type spore trap. The main pollen season (MPS) takes place in April and May for Quercus and Fagus, in June and July for Castanea. The highest values occur in year 1993 for Querc ...
... In this study, the chemical characterization of airborne bacteria is explored using X-ray photoelectron spectrometry (XPS) and Fourier transform infrared spectroscopy (FTIRS). Samples were taken by using a 6-stage Andersen impactor. Airborne bacteria were collected on nutrient media in Petri dishes located on all impactor stages. On the basis of the obtained XPS spectra the ratios of N/C, O/C, and ...
Ambrosia artemisiifolia; air; air flow; analysis of variance; clinical trials; environmental exposure; particle size; pollen; samplers; sampling; Ontario
Abstract:
... The Environmental Exposure Unit (EEU) is a 924 m³ facility (Kingston General Hospital, Ontario) in which uniform concentrations of various pollens in HEPA-filtered air at known rates of laminar airflow can be maintained. This facility provided a unique opportunity to compare several air samplers without the environmental variation inherent in outdoor comparisons. The purpose of this study was to c ...
... Airborne Pollen grains and Spores of three different cities viz., Al-Khobar (1987–1988), Abha (1991–1992) and Hofuf (1992–1993) in Saudi Arabia were studied using Burkard Volumetric Seven-Day Spore Trap. The data were analyzed in relation to their allergenic capability and one-year pollen and spore calendars were designed to correlate the patients’ symptoms as well as for selection of appropriate ...
... Seven-day volumetric spore samplers were installed in pear orchards of northern Italy, in the years between 1993 and 2002, and operated continuously during the development of brown spot epidemics (mid-April–mid-August), caused by Stemphylium vesicarium. Aerial concentration of conidia was recorded at 2 h intervals to study their diurnal and seasonal patterns and the influence of weather conditions ...
Bacillus atrophaeus; air flow; fiberglass; forces; human health; models; plastics; prediction; remediation; roughness; spore-forming bacteria; spores; steel; surfaces; velocity; ventilation systems
Abstract:
... Experiments with dry, fluidized spores were conducted in a test apparatus to delineate the extent of spore contamination and deposition behavior under normal airflow conditions within a ventilation system. The surrogate biological warfare agent used in experiments was the spore-forming bacterium Bacillus atrophaeus. Viable-spore-counting methods were used in the study because they provide the most ...
... This study determined whether selective media, McConkey agar (MC) and minimal salt glucose agar (MA) are suitable for monitoring aerosolization damage of airborne Serratia marcescens in our laboratory aerosol exposure system and assessed the relationship between bacterial culturability in these media and ultraviolet germicidal irradiation (UVGI) susceptibility of the bacteria. Two types of bacteri ...
airborne microorganisms; bacteria; case studies; composting; gall bladder; human resources; poultry; residential areas; risk; slaughterhouses; wastewater; working conditions; Austria
Abstract:
... According to Council Directive 90/679/EEC on the protection of workers from risks related to exposure to biological agents at work, nature, degree and duration of workers’ exposure to microorganisms must be determined. This directive has already been implemented in waste and wastewater management. The present case study investigates concentration and composition of microorganisms in a poultry slau ...
... A continuous aeropalynologic survey of the atmosphere of La Plata was carried out between July 1998 and June 2001 in order to study flowering development from winter to summer using a Lanzoni volumetric spore trap. The total pollen spectrum was represented by 79 pollen types. Between 10 and 12 pollen types showed a relative concentration of more than 1% of the annual total. Airborne pollen was mai ...
... Toledo is one of the main tourist spots of Spain, attracting around two million visitors per year. Its geographical situation in the vast and scarcely monitored Region of Castilla La Mancha and the high number of tourists (especially in the spring) has resulted in the Spanish Aerobiology Network (REA) making this city a major study objective. Air monitoring studies carried out using REA sampling p ...
González-Parrado, Zulima; Fuertes-Rodríguez, Carmen Reyes; Vega-Maray, Ana M.; Valencia-Barrera, Rosa M.; Rodríguez-Rajo, F. Javier; Fernández-González, Delia
... Winter-flowering trees such as the alder (Alnus glutinosa (L.) Gaertner) can survive periods of adverse climatic conditions, entering a period of dormancy in the early fall. The end of dormancy and the start of the pollen season require a period of low temperatures followed by another of warm temperatures. These requirements were studied from 1995 to 2002, in order to develop a model to predict th ...
... High concentrations of airborne fungal spores frequently occur from spring through fall in temperate areas of the world. Although it is generally assumed that fungi on leaf surfaces are contributors to the air spora, little data are available comparing the types of fungi found on leaf surfaces with those in the atmosphere. Air sampling was carried out with a Burkard Spore Trap located on the roof ...
... This paper reviews the terms and major criteria used to define and limit the pollen season. Pollen data from Cordoba (Spain), Ourense (Spain) and Bologna (Italy) were used to ascertain the extent to which aerobiological results and pollen curves are modified by the criteria selected. Results were analysed using Spearman[Latin small letter a with double grave]9s correlation test. Phenological obser ...
... Ragweed (genus Ambrosia) and mugwort (Artemisia vulgaris) pollen grains are known to be very potent aeroallergens, often noted to enter into cross reactions. The aim of the study was to analyse ragweed and mugwort pollen release in Szczecin (western Poland) during the period 2000-2003. Measurements were performed by the volumetric and gravimetric method. Pollen seasons were defined as the periods ...
... Long-range transport of gases and aerosols depends on vertical and horizontal air shifts: studies on atmospheric transport have to be based on the meteorological conditions of the environment. The aim of this paper is to review the physical principles on which meteorological models are based, and to make an exhaustive inventory of the main models used for the prognosis and diagnosis of air masses ...
... A record-breaking heat wave affected the European continent in summer 2003. In Switzerland, the temperature in June, July and August exceeded the 1961-1990 mean by about 5 °C. These extreme temperatures had significant effects on the pollen production and on the airborne pollen loads. Especially affected was the grass pollen season, which started 1-2 weeks earlier than in the mean. During May and ...
... Two years atmospheric survey of air-borne Aspergillus was carried out in the environmental conditions of South Assam. The survey revealed a total of 16 different species of Aspergillus with marked seasonal and annual variations. Aspergillus fumigatus was found to be the dominant atmospheric fungal species followed by Aspergillus flavus, Aspergillus niger, etc. Among the sample extracts tested, hig ...
... Fungal organisms cause diseases in plants, animals, and human beings. They are responsible for deterioration of organic objects. Scientists have found that it is not the occurrence but quantum of inoculum or number of spores per unit area which has a direct effect on development of diseases in fields as well as in markets. An aerobiological survey of three fruit markets of Vadodara, India was unde ...
... A study was carried out on suspended dust, bacterial and fungal aerosols in a four-storey flourmill building located in Giza, Egypt. Airborne microorganisms were quantitatively isolated using liquid impinger and gravimetric samplers during the period from March 2004 to February 2005. Suspended dust varied from 1.96 to 16.3 mg m-³ and 0.69 to 1.8 mg m-³ in the indoor and outdoor environments, respe ...
... The objective of this project was to study the pollen spectrum of the Marahué Wildlife Reserve (Central Argentina), the quantity and quality of airborne pollen grains, and to evaluate the contribution of outside sources, to protect a natural habitat with xerophytic shrub vegetation (“monte”) (the term “monte” is used for the dominant xerophytic shrub vegetation in the “partido” of Villarino) appro ...
... The presence of airborne Cyperaceae and Juncaceae pollen was quantified using volumetric aerobiological traps over a 10-year period at two sites in SW Spain separated by 60 km (Badajoz 10 years, Mérida 3 years). The Pearson correlation coefficient was calculated between the daily and hourly concentrations. The values of the principal meteorological parameters--temperature, rainfall, relative humid ...
... Several halotolerant bacteria were isolated from dust allowed to settle passively on saline medium in Higashi-Hiroshima, Japan during Asia dust events in 2005-2006. The primary identification, based on the sequence similarity of the 16S rRNA gene, revealed that these isolates were strains of Bacillus subtilis, B. licheniformis, Staphylococcus epidermidis, Gracillibacillus sp., and Halomonas venust ...
... The oak processionary moth (Thaumetopoea processionea L.) is found in oak forests in most European countries. The caterpillars bear urticating hairs (setae) as a chemical defence. These hairs break off and are small enough to become airborne and be transported by the wind. Upon contact with humans the toxin can cause an allergic reaction that ranges from a skin rash to respiratory distress. In ord ...
Betula; pollen; British Isles; Denmark; Eastern European region; Scandinavia
Abstract:
... The purpose of this study was to investigate the relationship between possible long-distance transport of birch pollen and episodes of elevated concentration in Denmark. By analysis of a twenty-six year (1980-2006) time-series of bi-hourly birch pollen counts from two sites (Copenhagen and Viborg) episodes of elevated counts (more than 100 grains) were identified in fewer than 2% of cases. Traject ...
Alternaria; Pleospora; fungal spores; meteorological parameters; neural networks; prediction; time series analysis
Abstract:
... A 1-year time series of fungal spore concentrations has been used to calibrate an artificial neural network for the estimation of Alternaria and Pleospora concentrations associated to observed meteorological variables. Analysis of the results revealed that the daily average values of these meteorological variables are suitable to predict with high confidence the number of fungal spores that are ac ...
... The main crop of the A Limia region is the potato, with an average production of 5 million kilos per year, under the protected geographic indication (IGP) Pataca de Galicia (Galician potato) label recognized by the European Community. Alternaria represents an important part of the pathogenic fungus spectra on this crop, representing an average of 1.9-3.1% of the spores collected. It represents the ...
... A quantitative and qualitative survey was carried out for airborne fungus spores coming into contact with horizontally and vertically gravitation sampling oriented surfaces in the atmosphere of Giza city. Czapek Dox agar, malt extract agar, potato dextrose agar and Sabouraud dextrose agar Petri dishes were exposed monthly to the five oriented surfaces of a polystyrene cube, throughout a one-year p ...
crop production; flowering; fruit growing; models; olives; pollen; principal component analysis; Portugal
Abstract:
... The aim of this study was to improve the accuracy of aeropalynological models to forecast yields in areas with heterogeneous characteristics by applying principal component analysis to integrate the airborne pollen sampled from more than one trap. The sampling was performed during the past seven years (1998-2004) in the main northeast olive regions of Portugal. Annual crop production was forecaste ...
... Although the number of studies of pollen concentrations inside and outside buildings is increasing, little is known about the efficiency of penetration of pollen from outdoor to indoor air, and further. We studied indoor and outdoor pollen concentrations in the town of Lappeenranta and in the municipality of Rautjärvi in SE Finland from May 3-23, 2004, i.e. throughout the Betula pollen season, and ...
... Environmental samples analyzed by quantitative PCR (qPCR) are subject to interference by inhibitors present in the environment being sampled. A controlled determination of the effect of inhibitors associated with sampling indoor air and the ability of internal standard controls to detect inhibition was carried out by filter collection of air samples followed by spiking of the filters with green fl ...
Phakopsora pachyrhizi; USDA; crop production; decision support systems; farmers; foliar diseases; growing season; inoculum; latitude; models; pathogens; prediction; soybean rust; soybeans; Ohio River; United States
Abstract:
... Soybean rust (Phakopsora pachyrhizi) has recently invaded North America and has the potential to be the most destructive foliar disease of soybean. As part of the response to this threat, the Integrated Aerobiology Modeling System (IAMS) was constructed to forecast the aerial movement of this pathogen from subtropical to middle latitude portions of the continent. IAMS simulations have been conduct ...
Marchantia polymorpha; air pollution; bags; catalase; chlorophyll; copper; lead; manganese; monitoring; mosses and liverworts; peroxidase; physiology; sugars; summer; India
Abstract:
... Mussoorie in the western Himalayas of India, a popular tourist destination, was selected for air pollution monitoring. The study was carried out applying thalloid liverwort species Marchantia polymorpha L. as a tool. Moss bags containing M. polymorpha was transplanted at residential, highly and less polluted areas to obtain comprehensive and comparative data. Lead content, along with some essentia ...
Pinus roxburghii; forests; gene flow; pollen; trapping; trees
Abstract:
... Pollen migration in Pinus roxburghii has been estimated under two different conditions, viz. isolated single trees and at the fringe of natural forest. Trapping of pollen grains was conducted at geometrically increasing distances, i.e., 0, 5, 10, 20, 40, 80, 160, 320, 640, 1280 and 2560 m from the source. The observations revealed that the scattering of pollen grains was not uniform in all directi ...
... An aeropalynological study was carried out in the atmosphere of the city of Nerja (southern Spain) during a period of 4 years (2000-2003), using a Hirst type volumetric pollen trap. An annual pollen index of 59,750 grains, on average, was obtained with 80-85% of the total pollen recorded from February to May, with Pinus, Olea, Urticaceae, Cupressaceae, Quercus and Poaceae being the principal polle ...