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Chronic pulmonary aspergillosis is a long-term fungal infection caused by members of the genus Aspergillus—most commonly Aspergillus fumigatus. [8] The term describes several disease presentations with considerable overlap, ranging from an aspergilloma [12] —a clump of Aspergillus mold in the lungs—through to a subacute, invasive form known as chronic necrotizing pulmonary aspergillosis ...
A fungus ball in the lungs may cause no symptoms and may be discovered only with a chest X-ray, or it may cause repeated coughing up of blood, chest pain, and occasionally severe, even fatal, bleeding. [2] A rapidly invasive Aspergillus infection in the lungs often causes cough, fever, chest pain, and difficulty breathing. [citation needed]
Fungal pneumonia is an infection of the lungs by fungi. It can be caused by either endemic or opportunistic fungi or a combination of both. Case mortality in fungal pneumonias can be as high as 90% in immunocompromised patients, [1] [2] though immunocompetent patients generally respond well to anti-fungal therapy.
Uredo is a genus of rust fungi: long considered incertae sedis in the order Pucciniales, but now placed in the family Pucciniaceae. [2] This long-established genus, together with the closely-related Uromyces (which some authorities consider to be synonymous), give their names to "uredo-type" fungal spore structures such as "urediniospore" and uredinium".
The fungus settles in a cavity and is able to grow free from interference because critical elements of the immune system are unable to penetrate into the cavity. As the fungus multiplies, it forms a ball, which incorporates dead tissue from the surrounding lung, mucus, and other debris.
Puccinia graminis is a macrocyclic heteroecious fungus that causes wheat stem rust disease. [citation needed] The sexual stage in this fungus occurs on the alternate host – barberry – and not wheat. The durable spore type produced on the alternate host allows the disease to persist in wheat even in more inhospitable environments.
The spores need several hours of dew or rain for spores to germinate and infect the host. [25] [26] Puccinia asparagi thrives where dews or fogs are prevalent because droplets of water are needed for successful infection of the host plant. [17] At 59 °F (15 °C) a three-hour, spore-wetting period is needed for initial infection.
Urediniospores are more or less reniform, 26–40 × 18-28 μm, with hyaline to pale yellowish wall, 1–2 μm thick, strongly warted on the convex side, smooth on the straight or concave side, warts frequently longer (3–7 μm) on spore edges. There have been no known reports of a host capable of supporting an aecial stage of the fungus. [5]