Chest CT Scan Findings in Children with COVID-19: A Systematic Review.

Objectives: To gather, summarize, and appraise the available evidence on: 1) the accuracy of chest CT scan in diagnosing COVID-19 among children, and 2) the characteristic chest CT scan findings associated with COVID-19 pneumonia in children. Methods: We comprehensively searched databases (MEDLINE, COCHRANE), clinical trial registries, bibliographic lists of selected studies, and unpublished data for relevant studies. Guide questions from the Painless Evidence Based Medicine and the National Institutes of Health Quality Assessment Tools were used to assess study quality. Results: A poor quality study showed 86.0% (95% CI 73.8, 93.0) sensitivity and 75.9% (95% CI 67.1, 83.0) specificity of chest CT scan in diagnosing COVID-19 in children. Thirty-nine observational studies describing chest CT scan in children with COVID-19 showed abnormal findings in 717 of 1028 study subjects. Common chest CT scan findings in this population include: 1) ground glass opacities, patchy shadows, and consolidation, 2) lower lobe involvement, and 3) unilateral lung lesions. Conclusion: Studies which investigate the accuracy of chest CT scan in the diagnosis of COVID-19 in children are limited by heterogeneous populations and small sample sizes. While chest CT scan findings such as patchy shadows, ground glass opacities, and consolidation are common in children with COVID-19, these may be similar to the imaging findings of other respiratory viral illnesses.

Microbiology and antibiotic susceptibility of organisms in bile cultures from patients with and without cholangitis at an Asian academic medical center.

PURPOSE: To review the epidemiology of microbial isolates from bile cultures taken from patients with and without cholangitis admitted to an Asian academic medical center in order to compare antimicrobial sensitivities and to make recommendations for empiric antimicrobial therapy of patients with cholangitis in the Philippines. METHODS: Routine aerobic bile culture results and corresponding clinical abstracts of surgical patients admitted to an academic medical center over a three-year period were analyzed. RESULTS: The series consisted of 125 patients, 77 with cholangitis (62%) and 48 (38%) without, which was determined according to the Tokyo Guidelines. Patients with cholangitis were significantly more likely to have positive bile cultures (p = 0.012). Gram-negative bacilli were the most common isolates in both patients with (94%) and patients without (95%) cholangitis. For both groups, Escherichia coli (36%) had greatest sensitivity to amikacin, cefepime, ceftriaxone, gentamicin, imipenem-cilastatin meropenem, and piperacillin-tazobactam; Klebsiella pneumoniae (16%) had greatest sensitivity to amikacin, cefepime, ceftriaxone, gentamicin, imipenem-cilastatin meropenem, and piperacillin-tazobactam; and Pseudomonas aeruginosa (12.5%) was most sensitive to cefepime, gentamicin, imipenem-cilastatin meropenem, and piperacillin-tazobactam. CONCLUSIONS: Gram-negative bacilli (or Enterobacteriaceae) (E. coli, K. pneumoniae, P. aeruginosa, and Enterobacter cloacae) were the most common aerobic microbial isolates in bile cultures from patients with cholangitis in the Philippines. Their antimicrobial susceptibility patterns suggest that imipenem-cilastatin (sensitivity 100%), meropenem (100%), amikacin (90-100%), cefepime (75%-100%), ceftriaxone (75%-100%), gentamicin (67%-100%), and piperacillin-tazobactam (50%-100%) would be the most effective antimicrobials for both groups. However, the authors echo the caution from the Surgical Infection Society/Infectious Diseases Society of America against using aminoglycosides as empiric drugs when safer and equally effective regimens are available.