In order to determine the status of Enterobius vermicularis infection among schoolchildren in suburban areas of Myanmar, 761 primary schoolchildren in 3 different townships around Yangon City were subjected to a survey using cello-tape anal swabs. The subjected schoolchildren were 383 boys and 378 girls who were 5-7 years of age. Only 1 anal swab was obtained from each child. The overall egg positive rate of E. vermicularis was 47.2% (359 positives), and sex difference was not remarkable (48.6% in boys and 45.8% in girls). However, the positive rate was the highest in South Dagon (54.6%) followed by Hlaing Thayar (43.8%) and North Dagon (34.8%). This difference was highly correlated with the living standards of the people in each township. Nucleotide sequence of the 5S rDNA from the eggs on the cello-tape (2 children) revealed 99.7% identity with that of E. vermicularis reported in GenBank. The results indicated that E. vermicularis infection is highly prevalent among primary schoolchildren around Yangon, Myanmar.
Background: Hypocapnia has been associated with an increased risk and adverse outcomes in the injured brain. This study aimed to identify risk factors of intraoperative hypocapnia in pediatric neurosurgical patients when tidal volumes and respiratory rates were determined based on their weight and age, respectively. Methods: Electronic medical records of pediatric patients (≤18 years) who underwent neurosurgery from December 2014 to January 2016 were retrospectively reviewed. Minute ventilation was fixed according to each patient's weight and age. Hypocapnia was defined as arterial partial pressure of carbon dioxide <35 mm Hg from intraoperative arterial blood gas analysis. Patients were divided into hypocapnia and nonhypocapnia groups. Risk factors for intraoperative hypocapnia were found using univariable and multivariable logistic regression analyses. Results: Of the 333 pediatric patients analyzed, 101 (30%) and 232 (70%) were included in the hypocapnia and nonhypocapnia groups, respectively. There was no difference in the minute ventilation between the two groups. The hypocapnia group had more patients taking valproate (8.9 vs. 2.2%; p = 0.008; OR, 4.441; 95% CI, 1.449-13.61) and carbonic anhydrase inhibitors (7.9 vs. 2.2%; p = 0.018; OR, 3.905; 95% CI, 1.245-12.25). An operation for hydrocephalus was more commonly performed in the hypocapnia group (26.7 vs. 15.9%; p = 0.017; OR, 1.923; 95% CI, 1.094-3.379). In the multivariable regression analysis, valproate (OR, 3.939; 95% CI, 1.250-12.41; p = 0.019), carbonic anhydrase inhibitor (OR, 3.345; 95% CI, 1.029-10.88; p = 0.045), and operation for hydrocephalus (OR, 1.838; 95% CI, 1.032-3.272; p = 0.039) were independent risk factors for intraoperative hypocapnia. Conclusions: Pediatric patients taking valproate and carbonic anhydrase inhibitors and who were scheduled for surgery of hydrocephalus were at risk of developing intraoperative hypocapnia during neurosurgery, a finding warning the surgeon that a conventional ventilatory strategy would endanger these patients.
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