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Ascariasis Diagnosis
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Ascariasis
Diagnosis

Diagnostic methods

Parasitological diagnosis
Ova can be easily recovered from faeces of infected individuals. Be aware that fertilized and non-fertilized eggs look different.
Rarely, adult worms may be found in stools.
During the larval migration phase, larvae may be found in the sputum.

Molecular diagnosis
No tests in use

Antigen detection
No tests developed so far

Antibody detection
Tests for IgE and IgG antibodies available, the problem is the lack of specificity

Diagnostic strategies 

  1. Screening populations to assess the prevalence
    Perform a cross-sectional study analysing fixed stool specimens with a concentration method (preferably by sedimentation since unfertilized eggs do not float)
     
  2. Detecting Ascaris in exposed individuals
    Examine fresh stools for ova directly (or after concentration)
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