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  Home ››› Lesson ››› Lesson Detail
   ID:88 | Posted: 4/12/2006 3:28:13 AM |  Title: Fungal Infection :Aspergillosis  

Aspergillosis is an infection or an allergic response
caused by a fungus of the Aspergillus type. It may play a role in allergy, but
is best known for causing serious pulmonary infections in immunocompromised
patients


 


It causes illness in three ways:


 


as an allergic reaction in people with asthma


 


as a colonization and growth in a lung injury (such as from
tuberculosis or lung abscess)


 


as an invasive systemic infection with pneumonia, nasal
necrosis or aural inflammation and necrosis that is spread to other parts of the
body by the bloodstream (pulmonary aspergillosis - invasive type).


 


Symptoms


 


Allergic aspergillosis


Fever


Malaise


Coughing


Coughing up blood or brownish
mucous plugs


Wheezing


Weight loss


Recurrent episodes of lung
obstruction


 


Invasive infection


Fever


Chills


Headaches


Cough


Shortness of breath


Chest pain


Increased sputum production, which
may be bloody


Bone pain


Blood in the urine


Decreased urine output


Weight loss


Symptoms involving specific organs


Brain: meningitis


Eye: blindness or visual
impairment


Sinuses: sinusitis


Heart: endocarditis


 


Signs and tests


 


Abnormal chest X-ray or CT scan


Sputum stain and culture showing Aspergillus


Tissue biopsy (see bronchoscopy with transtracheal biopsy)
for aspergillosis


Aspergillus antigen skin test


Aspergillosis precipitin antibody or galactomannan
positivity


Elevated serum total IgE (immunoglobulin)


Peripheral eosinophilia with allergic disease


 


Treatment


intravenous amphotericin B, an antifungal medication.


Itraconazole can also be used, or its newer counterpart
voriconazole.


Caspofungin may be tried when other drug therapy has
failed.


 


Endocarditis caused by Aspergillus is treated by surgical
removal of the infected heart valves and long-term amphotericin B therapy.


 


Allergic aspergillosis is treated with oral prednisone.


By :dpsingh

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