Screening NTDs in Migrants: Verona Study

Here’s a breakdown of the key data from the provided text, focusing on eosinophilia and helminthic infections:

Key Findings:

Eosinophilia Prevalence in Migrants:
18.2% of African migrants exhibited eosinophilia.
26.9% of Asian migrants exhibited eosinophilia.
Associated Infections:
In African migrants, eosinophilia was primarily linked to schistosomiasis.
In Asian migrants, eosinophilia was primarily linked to strongyloidiasis.
Eosinophilia as a Marker:
Eosinophilia is a sensitive marker for helminthiasis (worm infections) – meaning it’s good at identifying who might have an infection.
However, it has low specificity – meaning it can be triggered by things othre than worm infections (allergies, autoimmune diseases).
Lack of Eosinophilia in infected Individuals:
Strongyloidiasis (S. Stercoralis): 22.2% of infected individuals did not have eosinophilia (2/9 cases).
Schistosomiasis (Schistosoma spp.): 54.0% of infected individuals did not have eosinophilia (27/50 cases). Chronic infections may not always cause a sustained eosinophilic response.

Conclusion/Recommendation:

Eosinophilia alone is not sufficient to rule out helminthic infections. A combined diagnostic approach is crucial, including:
Eosinophilia assessment
Direct parasitological methods (examining samples for worms/eggs)
Serology (testing for antibodies)
Molecular techniques (e.g., PCR to detect parasite DNA)

References Cited (for further reading):

[27] Salzer et al. (2017) – Discusses diagnostic value of medical history,eosinophil count,and IgE in helminthic infections.
[28] Ding et al. (2024) – Retrospective study of refugees with eosinophilia. [29] Folci et al. (2021) – Eosinophils role in type 2 inflammation and autoimmunity.
[30] O’Connell & nutman (2015) – Eosinophilia in infectious diseases.