![]() Temp: Air temperature, T min: minimum temperature, T mean: Average temperature, T max: maximum temperature, T osc: Oscillation of temperature, RH: Relative Humidity, Rf: Rainfall, Rf(−3): rainfall of 3 days before, AP: air pressure, Wind: wind velocity, SR: Solar radiation, (−) negative correlations, (hourly): parameters compared via hourly data, %: percentage of the spore over the total amount of spores in the study. Parameters correlated with fungal spores by study region. Generally, a threshold of 100 spores/m³ has taken as high daily concentration of Alternaria, although earlier studies suggest it should be as low as 50 spores/m 3, with different levels being adapted in each study (10–30 spores/m 3 in example ). For Cladosporium, several concentration thresholds between 2000–4000 spores/m 3 have been suggested, although more recent studies have narrowed the values to 500–1500 spores/m 3. Although allergy or pathogeny concentration thresholds have not been yet established for Cladosporium and Alternaria, different studies have proposed some. The importance of these genera lies in the economic and health losses they can both cause: both genera are known plant pathogens, both have many phytotoxic metabolites which can also affect mammalian cells and have aeroallergens linked to effects on health. The Cladosporium and Alternaria genera are the most studied fungal spores, and they have been monitored in several geographical regions including the United Kingdom, Denmark, Poland, Portugal, Spain, Italy, Turkey, China, South Africa, Nigeria, and the United States, among others. ![]()
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