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Published on: February 22, 2019
[Malignant pertussis in the young infant]
H Pilorget1, A Montbrun, T Attali
1Réanimation néonatale et pédiatrique, CHD Félix-Guyon, 97405 Saint-Denis cedex, La Réunion, France. neonat@chd-fguyon.fr
Insights
Malignant pertussis is a severe condition in infants, often fatal despite treatment. Adult pertussis is a key source of infant infection, highlighting the need for widespread vaccination.
Area of Science:
- Pediatrics
- Infectious Diseases
- Public Health
Background:
- Pertussis is a leading cause of infant mortality in France.
- Malignant pertussis predominantly affects infants aged 10 days to 2 months.
Observation:
- A 40-day-old infant presented with bronchiolitis, tachycardia, leukocytosis, and neurological symptoms.
- The infant rapidly developed respiratory and circulatory failure, succumbing within five days.
- Pertussis was confirmed via PCR, with intra-familial transmission suspected.
Findings:
- Malignant pertussis is defined by young patient age, persistent tachycardia, respiratory failure, neurological signs, hyperleukocytosis, and hyponatremia.
- Mortality rates exceed 75% even with intensive care.
- Adult pertussis is a significant source of infection for unvaccinated infants.
Implications:
- Widespread pertussis booster vaccination in adolescents is crucial.
- Extending vaccination to adults is under consideration to protect vulnerable infants.
- Early diagnosis and intervention are critical for managing severe pertussis cases.
Unlabelled:
Pertussis remains in France the first cause of bacterial, infectious death in infant aged 10 days to 2 months. It is especially in this age group that malignant pertussis occurs.
Case Report:
A 40-day-old infant was admitted in the intensive care unit with symptoms of bronchiolitis along with a 200 bpm permanent tachycardia. He presented a marked leukocytosis with lymphocytosis. On the second day, convulsions and coma occurred, followed rapidly by respiratory failure, with a subsequent deterioration due to the development of severe pulmonary hypertension. Circulatory failure caused the infant's death on the beginning of the 5th day. Pertussis was confirmed by PCR on nasopharyngeal swab. Intra-familial contamination was most likely.
Comments:
Malignant pertussis is characterized by the very young age of patients, permanent tachycardia sine materia, dyspnea with early respiratory failure, frequent neurological symptoms, severe hyperleukocytosis and hyperlymphocytosis, and deep hyponatremia with oliguria and edema. Mortality remains superior to 75% despite the various treatments and life support measures that have been attempted. Adult pertussis, which represents one third of the cases of prolonged cough in this age group, is the main source of contamination of non-immunized young infants. This mode of transmission stresses the importance of the generalization of pertussis vaccine booster in early adolescence, which is recommended in France since 1998. Its extension towards the adult age is under study.
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