Clinical features of Mycoplasma pneumoniae infection complicated with extrapulmonary digestive system lesion in different age

Abstract

Objective To investigate the clinical features of Mycoplasma pneumoniae infection complicated with extrapulmonary digestive system damage in patients of different age. Methods 260 children with Mycoplasma pneumonia and extrapulmonary digestive system damage were chosen.Among them, 84 cases <3 years old were infants and young children group, 176 children aged ≥3 years were children group.The clinical data of children were analyzed and compared. Results The rates of nausea (69.0% vs.36.4%), vomiting (88.1% vs.55.7%) and diarrhea (83.3% vs.53.4%) in infants were significantly higher than those in children.The percentage of abdominal pain(16.7%% vs 52.3%) was significantly lower than that in children (χ2=24.389, 26.681, 29.853, 21.862, all P<0.05). The proportion of intestinal gas accumulation in infants and young children was significantly higher than that in children group (31.0% vs.5.7%) (χ2=4.996, P<0.01). The proportion of Mycoplasma 1∶40 titer in infants group was significantly higher than that in children group(52.4% vs.21.6%), and the proportion of 1∶80 and 1∶160 titers was significantly lower than that in children group (28.6% vs.48.9%, 11.9% vs.25.6%, χ2=24.966, 9.593, 6.365, all P<0.05). Conclusion In infants and young children with Mycoplasma pneumoniae infection complicated with extrapulmonary digestive system damage, nausea, vomiting and diarrhea are common, and the proportion of intestinal tract gas accumulation is higher.The laboratory test is mainly based on the 1∶40 titer.In children, abdominal pain was more common, and laboratory tests showed a higher proportion of 1∶80 and 1∶160 titers. Key words: Mycoplasma, pneumoniae; Gastrointestinal tract; Child