Weekly Report

28 February 2020

City
Overall Risk
Tree Pollen
Grass Pollen
Weed Pollen
Mould Spores
Cape Town
Johannesburg
Bloemfontein
Durban
Pretoria
Port Elizabeth
Kimberley

Cape Town

The levels for this week were modelled on 10 years of archived data and current weather patterns. Grasses were low, tree pollen was low and included the types; eucalyptus, white stinkwood and olive. Weeds included goosefoot, the daisy family and dandelion. Mould levels were low.

Johannesburg

Grass concentrations were moderate throughout this sampling week and were >10 per day. Trees were very low and included the types: cypress, pine and eucalyptus. Weeds were similarly very low and only Chenopodiaceace (Goosefoot) was detected. Moulds were generally low but ascospores increased following rain.

Pretoria

Grass concentrations were moderate to high throughout the week again  >10 per day.  Trees were low and included the types: eucalyptus and cypress Low weed concentrations included: Chenopodiaceace (Goosefoot). Moulds were generally low, but small spikes were seen for Cladosporium and Alternaria.

Johannesburg

High to very high grass levels were seen throughout the sampling week at this site. Low tree levels included olive, buddleja and cypress. Weed levels were low and included the daisy family and goosefoot. Mould levels were low overall but high levels were detected throughout the week for Alternaria.

Kimberley

Grasses were moderate to high at this site. Tree pollen levels were low and consisted of olive, cypress and rhus. Weeds included low levels for goosefoot and ragweed. Mould levels were generally low, but high levels of the allergenic mold Alternaria were detected throughout the week.

Durban:

Grass levels were high at this sampling site, and they have increased since last week. Tree loads also increased relative to the previous week, and were dominated by birch, with eucalyptus, white stinkwood and pine also recorded. Weed levels were low, including ragweed. Moulds were low but the mean count of 90 is approximate as the entire week was not counted for moulds.

Port Elizabeth

Grasses were low at this site and no tree or weed pollen was detected. Mould levels were low but ascospores increased following rain.

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