Comparison of performance between three SARS-CoV-2 molecular assays (Aptima™, Laboratory Developed Test-Fusion, and R-GENE®) with special attention to turnaround time, a key point in laboratory management.

The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) highlights the importance of rapid diagnostic testing to identify individuals with SARS-CoV-2 infections and to limit the spread of the virus. Many molecular assays have become commercially available to cope with this surging demand for timely diagnosis of COVID-19 cases, but identifying individuals requires accurate diagnostic tools. We compared the performance of three molecular SARS-CoV-2 assays: Aptima™ SARS-CoV-2 assay running on the Panther system (Hologic), an in-house assay (Laboratory Developed Test, LDT) running on the Fusion module of the Panther Fusion system (LDT-Fusion; Hologic), and the R-GENE® SARS-CoV-2 assay (bioMérieux). In addition, we also evaluated the turnaround time. This parameter is crucial to managing the SARS-CoV-2 diagnosis and represents a key point in the quality management at the laboratory. Aptima™ and LDT-Fusion assays exhibited an excellent positive percent agreement (PPA) (100.0%), while the R-GENE® assay showed a slightly decreased PPA (98.2%). The Hologic assays have a higher throughput with less hands-on time than the R-GENE® assays (24-25 vs. 71 min). Both Hologic assays are used on a fully automated random-access testing system with on-demand testing capabilities that avoid run series, unlike the R-GENE® assay. Automated random-access testing systems should be preferred during periods of high SARS-CoV-2 prevalence.

Inflammatory Bowel Diseases and School Absenteeism.

OBJECTIVES: Inflammatory bowel diseases (IBDs) are chronic diseases which negatively affect the schooling of children. The aim is to analyze school absenteeism and its causes in children followed for IBD. METHODS: A prospective multicenter study of IBD patients aged from 5 to 18 years old, from September 2016 to June 2017. Data on absenteeism and its causes were collected via a monthly questionnaire completed by patients or their family by mail. The results were compared with existing data supplied by the school authorities (497 students without IBD divided by class). RESULTS: A total of 106 patients (62 boys), median age of 14 (5-18), were included. The global response rate was 83.1%. The patients with IBD were absent an average of 4.8% ±â€Š5.5% of school days during the school year, against 3.2% ±â€Š1.6% for non IBD group (P = 0.034). Digestive disorders accounted for 34% of the causes of absenteeism. Approximately 27% of the absences were due to scheduled events (hospitalizations, endoscopy, or consultations). By excluding the absences for scheduled care, the rate of school absenteeism of patients with IBD is significantly lower than that of non-IBD group. CONCLUSION: Children with IBD are more frequently absent from school than non-IBD group. The main cause of school absenteeism appears to be associated with the disease itself. The share of scheduled absenteeism is quite large. The organization and scheduling of the patients' care path must be a priority to maximally limit the negative impact of their disease on the patients' schooling.

Immunization status in children with inflammatory bowel disease.

Inflammatory bowel diseases have an increased risk of infections due to immunosuppressive therapies. To report the immunization status according to previous recommendations and the reasons explaining a delay, a questionnaire was filled in by the pediatric gastroenterologist, concerning outpatients, in six tertiary centers and five local hospitals, in a study, from May to November 2011. One hundred and sixty-five questionnaires were collected, of which 106 Crohn's diseases, 41 ulcerative colitis, and 17 indeterminate colitis. Sex ratio was 87:78 M/F. Median age was 14.4 years old (4.2-20.0). One hundred and nine patients (66 %) were receiving or had received an immunosuppressive therapy (azathioprine, infliximab, methotrexate, or prednisone). Vaccines were up to date according to the vaccine schedule of French recommendations in 24 % of cases and according to the recommendations for inflammatory bowel disease in 4 % of cases. Coverage by vaccine was the following: diphtheria-tetanus-poliomyelitis 87 %, hepatitis B 38 %, pneumococcus 32 %, and influenza 22 %. Immunization delay causes were as follows: absence of proposal 58 %, patient refusal 41 %, fear of side effects 33 %, and fear of disease activation 5 %. Therefore, immunization coverage is insufficient in children with inflammatory bowel disease, due to simple omission or to refusal. A collaboration with the attending physicians and a targeted information are necessary.

Breastfeeding and respiratory, ear and gastro-intestinal infections, in children, under the age of one year, admitted through the paediatric emergency departments of five hospitals.

Background: Breastfeeding is a protective factor against respiratory and intestinal infections in developing countries. In developed countries, proof of this protection is more difficult to show. The objective of the study is to compare the proportion of children breastfed during their first year in groups of children with infectious pathologies supposedly prevented by breastfeeding and children free of these infectious pathologies. Method: Questionnaires about diet, socio-demographic data and the motive for consultation were given to the parents upon arrival in the paediatric emergency departments of 5 hospitals located in Pays de Loire (France) in 2018 and 2019. Children with lower respiratory tract infections, acute gastroenteritis and acute otitis media were included in the case group (A), children admitted for other reasons were included in the same control group (B). Breastfeeding was classified as exclusive or partial. Results: During the study period, 741 infants were included, of which 266 (35.9%) in group A. In this group, children were significantly less likely to have been breastfed at the time of admission than children in group B: for example, for children under 6 months, 23.3% were currently breastfed in group A, vs. 36.6% (weaned BF or formula diet) in group B [OR = 0.53 (0.34-0.82); p = 0.004]. Similar results were found at 9 and 12 months. After taking into account the age of the patients, the same results were confirmed with an aOR = 0.60 (0.38-0.94) (p = 0.02) at 6 months, but with when considering six variables six variables, aOR was not significative aOR = 0.65 (0.40-1.05); p = 0.08), meaning that factors such as the childcare out of home, socio-professional categories, and the pacifier decrease the protective effect of breastfeeding. Sensitivity analyses (age-matching, analysis by type of infection) showed the same protection effect provided by breastfeeding when it was pursued for at least 6 months and also that the protective effect of breastfeeding is especially true against gastro-enteritis. Conclusion: Breastfeeding is a protective factor against respiratory, gastrointestinal and ear infections when pursued at least 6 months after birth. Other factors such as collective childcare, pacifiers and low parental professional status can reduce the protective effect of breastfeeding.

Anal lesions presenting in a cohort of child gastroenterological examinations. Implications for sexual traumatic injuries.

The purpose of this study was to describe the anal lesions found in children during a pediatric gastroenterology consultation when the reason for the complaint was related to a digestive disease. This prospective descriptive study included 100 children under 15 years of age over a 13-month period, consulting due to digestive symptoms. The children were under 8 years old (90%) and 25% were under 3.1 years old. Constipation was the most frequent reason for consultation (69%). Fifty-one anal lesions were observed, of which 58.8% were anal fissures, 15.7% were skin tags and 5.8% were venous congestions related to straining. Anal fissures and skin tags were located at the median line, according to the clock-face method in supine position. No child had more than two anal lesions. No anal dilatation, sphincter hypotonia, anal scars, anal lacerations or bruises were found. The two most common anal lesions were anal fissures and skin tags. These anal lesions were mainly observed at the median line and were due to constipation. No cases of multiple anal lesions were found in terms of common digestive diseases.

Vaccination coverage of children with inflammatory bowel disease after an awareness campaign on the risk of infection.

BACKGROUND: Children with inflammatory bowel disease are at risk of vaccine-preventable diseases mostly due to immunosuppressive drugs. AIM: To evaluate coverage after an awareness campaign informing patients, their parents and general practitioner about the vaccination schedule. METHODS: Vaccination coverage was firstly evaluated and followed by an awareness campaign on the risk of infection via postal mail. The trial is a case-control study on the same patients before and after the awareness campaign. Overall, 92 children were included. A questionnaire was then completed during a routine appointment to collect data including age at diagnosis, age at data collection, treatment history, and vaccination status. RESULTS: Vaccination rates significantly increased for vaccines against diphtheria-tetanus-poliomyelitis (92% vs. 100%), Haemophilus influenzae (88% vs. 98%), hepatitis B (52% vs. 71%), pneumococcus (36% vs. 57%), and meningococcus C (17% vs. 41%) (p<0.05). Children who were older at diagnosis were 1.26 times more likely to be up-to-date with a minimum vaccination schedule (diphtheria-tetanus-poliomyelitis, pertussis, H. influenzae, measles-mumps-rubella, tuberculosis) (p=0.002). CONCLUSION: Informing inflammatory bowel disease patients, their parents and general practitioner about the vaccination schedule via postal mail is easy, inexpensive, reproducible, and increases vaccination coverage. This method reinforces information on the risk of infection during routine visits.

Central venous thrombosis and thrombophilia in cystic fibrosis: A prospective study.

BACKGROUND AND AIMS: Catheter venous thrombosis may result in life-threatening embolic complications. Recently, a thrombophilic tendency was described in cystic fibrosis (CF), the significance of which remains unclear. The aims of this study were to (1) document the frequency of catheter venous thrombosis detected by colour-Doppler-ultrasound (Doppler-US), (2) assess genetic and acquired thrombophilia risk factors for catheter venous thrombosis and hypercoagulability status and (3) provide recommendations on laboratory screening when considering insertion of a totally implantable vascular access device (TIVAD) in CF patients. METHODS: We designed a multicentre prospective study in patients selected at the time of catheter insertion. Doppler-US was scheduled at 1 and 6months after insertion and before insertion in case of a previous central line. Blood samplings were drawn at insertion and at 1 and 6months later. RESULTS: One-hundred patients received a TIVAD and 90 completed the 6-month study. Prevalence of thrombophilia abnormalities and hypercoagulability was found in 50% of the cohorts. Conversely, catheter venous thrombosis frequency was low (6.6%). CONCLUSION: Our data do not support biological screening at the time of a TIVAD insertion. We emphasise the contribution of a medical history of venous thromboembolism and prospective Doppler-US for identifying asymptomatic catheter venous thrombosis to select patients who may benefit from biological screening and possible anticoagulant therapy.

Contribution of capsule endoscopy to Peutz-Jeghers syndrome management in children.

BACKGROUND: Capsule endoscopy is recommended for children with Peutz-Jeghers syndrome as young as 8 years of age. Aim of our study was to evaluate the contribution of capsule endoscopy in managing risk of further obstructive complications. METHODS: A retrospective analysis of 27 children who received at least 1 capsule endoscopy was conducted. Peutz-Jeghers syndrome was diagnosed based on the presence of an STK11 gene mutation or on the association of a hamartoma with 2 of 3 criteria (family history, mucocutaneous pigmentation, small bowel polyposis). RESULTS: Thirty-seven capsule endoscopies were performed in 27 patients. The median age at first endoscopy was 11.4 years (range, 5.4-20.9). Jejunal polyps were found in 72% and ileal polyps in 55% of capsules. The original recommendations were followed 20/30 times. Three gastroscopies, 4 colonoscopies, 7 double balloon enteroscopies and 1 intra-operative enteroscopy were performed after the capsules. These procedures revealed jejunal polyps in 9/9 cases (8/9 resected) and ileal polyps in 3/5 (all resected). One intussusception occurred 8.4 months after the capsule endoscopy and required surgical resection. CONCLUSION: Capsule endoscopy is easily feasible in Peutz Jeghers syndrome, but the practice of systematic and repeated procedures needs to be validated prospectively.