Psittacosis differential diagnosis: Difference between revisions
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==Differentiating Psittacosis from other Disease== | ==Differentiating Psittacosis from other Disease== | ||
Psittacosis can be differentiated in 3 categories based on the manifestations of the patient. For the patient with atypical pneumonia, other conditions to consider include; | Psittacosis can be differentiated in 3 categories based on the manifestations of the patient. For the patient with atypical pneumonia, other conditions to consider include; | ||
*[[Chlamydia pneumoniae|Chlamydia pneumoniae | *[[Chlamydia pneumoniae|Chlamydia pneumoniae]] | ||
*[[Mycoplasma pneumoniae]] | *[[Mycoplasma pneumoniae]] | ||
*[[Legionella infection]] | *[[Legionella infection]] | ||
Line 21: | Line 21: | ||
*[[Brucellosis]] | *[[Brucellosis]] | ||
'''Table 1; | '''Table 1; Showing the differentials between [[C. psittaci]], [[C. pneumoniae|C. pneumonia]], [[M. pneumonia]], and [[Legionella pneumophila|L. pneumophila]]''' | ||
{| class="wikitable" | {| class="wikitable" | ||
!Clinical feature | !Clinical feature |
Revision as of 13:42, 30 June 2017
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Aditya Govindavarjhulla, M.B.B.S. [2]
Overview
Psittacosis must be differentiated from other diseases that cause atypical pneumonia, febrile illness without localizing signs and extrapulmonary manifestations such as gastroenteritis, hepatitis, meningitis, or encephalitis. The three main diseases to differentiate psittacosis from are Chlamydia pneumoniae, Mycoplasma pneumoniae, and Legionella infection as they tend to have similar clinical manifestations which can only be differentiated by taking appropriate histories and laboratory investigations. There are other conditions to watch out for which may also present similar to psittacosis.
Differentiating Psittacosis from other Disease
Psittacosis can be differentiated in 3 categories based on the manifestations of the patient. For the patient with atypical pneumonia, other conditions to consider include;
For the patient who presents with febrile illness without localizing signs, the following should also be considered;
Table 1; Showing the differentials between C. psittaci, C. pneumonia, M. pneumonia, and L. pneumophila
Clinical feature | C.psittaci | C.pneumoniae | M pneumoniae | L pneumophila |
---|---|---|---|---|
Cough | ++ | + | ++ | + |
Sputum | - | + | ++ | +++ |
Dyspnea | + | + | ++ | +++ |
Sore throat | - | ++ | - | - |
Headache | +++ | + | - | + |
Confusion | + | - | - | ++ |
Diarrhea | - | - | - | + |
Chest radiograph changes | Minimal | Minimal | Disparity | Often multifocal |
Hyponatremia | - | - | - | ++ |
Leukopenia | - | - | - | + |
Abnormal Liver function tests | + | - | + | ++ |
Response to doxycycline | Rapid- afebrile within 48 hours | Prompt | Prompt | Improved but still unwell |
Key;
+, occurs in some cases
++, occurs in many cases,
+++, occurs frequently