Table 2 Description of children with confirmed PID at the 3-month evaluation (n = 3).

From: Systematic screening for primary immunodeficiencies in patients hospitalized for severe infection in pediatric intensive care unit

Patient no

5

25

39

Age (y)

9,8

0,7

0,1

Sex

M

M

M

Intensive care duration (days)

2

3

1

Comorbidities/background

0/consanguinity

0/0

0/0

JMF/DSAI/CEREDIH

0

0

0

Infection type (pathogen)

Meningitis (Haemophilus influenzae b)

Viral infection (Adenovirus, Coronavirus and Enterovirus), revealed by complex seizures

Septic shock in context of urachal duct abscess (Klebsiella aerogenes)

Anomalies at 1st immunological investigation

Low C5

Poor response to pneumococcal vaccine, CD8 + T and B lymphopenia

Severe neutropenia

Diagnostic of PID

Complete C5 deficiency : homozygous deletion of 3 nucleotides c.960_962del/p.Asn320del on exon 9 of the C5 gene

22q11.21 heterozygous deletion of approximatively 1409 Mb (chr. Arr [GRCh37] 22q11.21(19943533_21353296) × 1); (Di George syndrome)

Congenital neutropenia: heterozygous deleterious variant c.640G > A/p. Gly214.Arg on exon 5 of the ELANE gene, de novo

Treatment

Antibiotic treatment and prophylaxis ; vaccination against encapsulated pathogens

Antibiotic prophylaxis ; Vaccination against encapsulated pathogens and flu

Antibiotic treatment and prophylaxis ; Allogenic stem cell transplant