Phylum1 - at higher risk from Coccidioides include those...

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Phylum Zygomycota The deserts of the southwestern United States and northern Mexico (as well as areas in South America) are home top an endemic fungus, Coccidioides immitis , which causes a disease in humans and animals known as valley fever. The disease, formally known as coccidioidomycosis, usually begins as a respiratory infection. In the most severe cases death results, although most sufferers survive and are thought relatively immune for the remainder of their lives. If diagnosed properly there are medical treatments available. Rumors of the use of this organism as a bioweapon are thought to be just rumors, due to the extreme care needed to grow and work with this organism, whose infectious spores are approximately the size of large bacteria. Those
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Unformatted text preview: at higher risk from Coccidioides include those with compromised immune systems (AIDS patients, transplant recipients, diabetics), certain ethnicities, and those whose work exposes them to desert soils at certain times of the year. This fungus, whose sexual stage is unknown at present, is of uncertain taxonomic placement: some structures look like zygomycetes, but the ribosomal RNA data suggests this fungus is an ascomycete. Some ascomycetes are (along with basiodiomycetes) the symbiotic mycorrhizae fungi that are important to plant root function. Plants with mycorrhizae grow better: the plant gets nutrients from the fungus in exchange for carbohydrates....
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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