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==Coccidioidomycosis==
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[[Coccidioidomycosis]]
[[Image:Coccidioidomycosis.jpg|thumb|right|200px|Coccidioidomycosis spherule histopathology - Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath]]
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*''Coccidioides immitis''
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*Ocurs in the soil
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**Respiratory infections
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**Most commonly seen following dust storms
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*Occurs in arid regions
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**E.g. South West USA and Mexico
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*Non-contageous, systemic mycosis
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*Affects dogs, cattle, sheep and humans
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*Mainly affects the [[Lungs - Anatomy & Physiology|lungs]]
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**Dissemination can occur to other organs
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*Causes nodule or granuloma formation
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**Localised
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**Gross lesions resemble [[Mycobacteria spp.#Bovine tuberculosis|Tb]] in cattle as are usually seen in the bronchial and mediastinal [[Lymph Nodes - Anatomy & Physiology|lymph nodes]] and occasionally [[Lungs - Anatomy & Physiology|lungs]]
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**Dissemination can occur, especially in primates and dogs, to the [[Lungs - Anatomy & Physiology|lungs]], [[Liver - Anatomy & Physiology|liver]], [[Spleen - Anatomy & Physiology|spleen]], [[Nervous and Special Senses - Anatomy & Physiology#Central Nervous System (CNS)|brain]] and [[Bones and Cartilage - Anatomy & Physiology|bones]]
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*Thick-walled spherules in tissue
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**Large sporangia burst leaving 'ghost' spherules
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*Saprophytic phase consists of coarse, septate, branching hyphae which fragment into thick-walled, barrel-shaped arthrospores which alternate with empty cells
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**Stained by Lactose Phenol Cotton Blue
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*Grows on Sabouraud's Dextrose agar and Blood agar
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**Flat, moist colonies which develop a coarse, cotton-like aerial mycelium which varies from white to brown in colour
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*Complement fixation test, latex agglutination and immunodiffusion tests can all be used
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**A positive skin test indicates exposure
      
==Entomophthoromycisus==
 
==Entomophthoromycisus==
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