The abrupt change of weather that the Cape has been experiencing has favoured the increase in fungal spores. Moist, cool days followed by warm dry weather has seen sharp increases in Alternaria, and Cladosporium concentrations. Grasses are low on days of rain becoming moderate on warm days. Weed levels are low, but Chenopodiaceae (fat hen) erica, English Plantain and dandelion are pollinating now. Tree levels have decreased to low levels but Cypress, pine, gum, olive, plane and oak are still present in the atmosphere in low concentrations.
The recent cold and rainy weather reduced the grass counts, but moderate grass concentrations were seen. Tree and weed pollen counts were low. Sunshine after rain increased fungal spore counts and Cladosporium increased but remained below the significant threshold. Alternaria counts were high. For further information on pollen and allergies see: www.lunginstitute.co.za (Allergy and Immunology Unit)
Rain during the last sampling week has removed pollen and fungal spores from the air. This should bring relief to hay fever sufferers. The grass counts are moderate. Tree pollen concentrations are waning, but moderate levels of olive are present in the atmosphere. Weed pollen levels remain low. Fungal spore levels are low but have increased and the Alternaria level is close to the threshold level.
Intermittent rain during the past sampling week removed pollen and fungal spores from the air. Despite the rain grasses were moderate. Low levels were seen for trees (cypress, oak, pine, plane, gum and olive). Weed pollen levels were low. There was a constant low background presence of fungal spores.
Grass concentrations increased during the past sampling week and were moderate with one high count. The tree pollen count remains high as oak and cypress complete their pollination cycle. Weed and fungal spore levels were consistently low.
The grass pollen concentration has increased to moderate levels. Some tree pollen is still high (cypress and oak) but tree pollen concentrations are decreasing. Olive, gum, plane, pine and poplar tree pollen is present in the air in low concentrations. Weed pollen concentrations are low but erica (heather), goosefoot and sorrel are present. The fungal spore load is generally low but significant Alternaria spores were present during the past sampling week especially following days with rain.
Tree concentrations remain high. Cypress, plane, pine and oak tree pollen is present in significant amounts in the atmosphere. Olive, mulberry, gum and willow concentrations are low. Weed and all fungal spore concentrations are low and grass pollen concentrations are similarly low, but increasing.
Rain during the last sampling week removed pollen and fungal spores from the air, but high tree pollen (cypress, pine and plane) were recorded. Low levels were seen for gum and oak trees. Very low levels were noted for grasses, sedge grasses and weeds (Erica). The fungal spore levels were similarly affected by rain, but ascospores increased following rain, as did Alternaria and fungal spores reached moderate levels at times.
Despite the rain, tree pollen counts are currently high. Significant levels of cypress, pine, plane and elm were present in the atmosphere during the past sampling week. Grass and weed pollen levels were low as were fungal spore levels.
Tree pollen levels were high during this sampling period with cypress pollen dominating the catch. Pine, plane, oak, gum and mulberry pollen was present in small quantities. Grass and weed pollen were low and fungal spore levels were similarly low. There was a small, but insignificant peak for Pleospora.