Bronchoalveolar Lavage Profiles in Uncontrolled Wheezy Children Compared
by Asthma Predictive Index
Abstract
The Asthma Predictive Index (API) predicts later asthma in preschoolers
with frequent wheeze. We hypothesized that airway cytology differs
between API positive(+ve)/negative(-ve) children with
uncontrolled/recurrent wheezing with dominance of eosinophils in API
(+ve) and neutrophils in API (-ve) groups respectively. Objective: To
compare bronchoalveolar lavage (BAL) cell profiles in API (+ve)/(-ve)
children with recurrent wheezing unresponsive to inhaled corticosteroids
(ICS). Design: A retrospective analysis of BAL in 43 children, 3-36
months (median: 14 months) receiving ICS (31 API +ve ; 12 API -ve). BAL
cell differential counts, bacterial/viral cultures, and lipid-laden
macrophage percentages (LLM) were analyzed. Cell counts presented as
median (range). Results: Neutrophil percentages were increased in both
groups [API -ve 16% (1-76%); API +ve 42% (1-95%); P=NS]. Cell
percentages were similar for lymphocytes [API-ve 12% (1-30%); API
+ve 7% (1-37%)], and macrophages [API -ve 67.5% (12-97%); API
+ve 41 % (2-94%)]. Eosinophil percentages were low in both groups
[API -ve 1 % (1-2%); API +ve 1 % (1-11%)]. Bacterial cultures
were positive in 16 (80%) API +ve and 4 (33%) API -ve patients
(P=0.10). Conclusion: Cell profiles do not differ between API groups in
children ≤36 months with recurrent wheezing unresponsive to ICS.
Positive correlation between neutrophil percentages and positive
bacterial cultures was seen independent of API. Persistent bacterial
bronchitis likely plays an important role in the persistence of symptoms
unresponsive to inhaled corticosteroid therapy regardless of API status
with a trend to more positive cultures in API positive children.