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The coronavirus disease 2019 (COVID‐19) pandemic has affected hundreds of thousands of people. Data on symptoms and prognosis in children are rare.
A systematic literature review was carried out to identify papers on COVID‐19, which is caused by the severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2), using the MEDLINE and Embase databases between January 1 and March 18, 2020.
The search identified 45 relevant scientific papers and letters. The review showed that children have so far accounted for 1%‐5% of diagnosed COVID‐19 cases, they often have milder disease than adults and deaths have been extremely rare. Diagnostic findings have been similar to adults, with fever and respiratory symptoms being prevalent, but fewer children seem to have developed severe pneumonia. Elevated inflammatory markers were less common in children, and lymphocytopenia seemed rare. Newborn infants have developed symptomatic COVID‐19, but evidence of vertical intrauterine transmission was scarce. Suggested treatment included providing oxygen, inhalations, nutritional support and maintaining fluids and electrolyte balances.
The coronavirus disease 2019 has occurred in children, but they seemed to have a milder disease course and better prognosis than adults. Deaths were extremely rare.
The results of many clinical tests are quantitative and are provided on a continuous scale. To help decide the presence or absence of disease, a cut‐off point for ‘normal’ or ‘abnormal’ is chosen. The sensitivity and specificity of a test vary according to the level that is chosen as the cut‐off point. The receiver operating characteristic (ROC) curve, a graphical technique for describing and comparing the accuracy of diagnostic tests, is obtained by plotting the sensitivity of a test on the
Conclusion: The ROC curve is obtained by calculating the sensitivity and specificity of a test at every possible cut‐off point, and plotting sensitivity against 1‐specificity. The curve may be used to select optimal cut‐off values for a test result, to assess the diagnostic accuracy of a test, and to compare the usefulness of different tests.
This study was aimed at systematically reviewing evidence of the association between breastfeeding and performance in intelligence tests.
Two independent searches were carried out using Medline,
We included 17 studies with 18 estimates of the relationship between breastfeeding and performance in intelligence tests. In a random‐effects model, breastfed subjects achieved a higher
Breastfeeding is related to improved performance in intelligence tests. A positive effect of breastfeeding on cognition was also observed in a randomised trial. This suggests that the association is causal.
The aim of this review is to present clinically relevant data on prenatal development of thalamocortical connections in the human brain. The analysis is based on extensive Zagreb Neuroembryological Collection, including more than 500 prenatal human brains stained with various classical neurohistological, as well as modern histochemical and immunohistochemical methods. The connection of thalamocortical axons during the ‘waiting’ period with transient cortical subplate zone and subsequent synaptic engagement in the cortical plate is the main connectivity event in the late foetus and preterm infant. This connectivity is the structural substrate for the endogeneous subplate and sensory‐driven circuitry generating transient electrical phenomena and may represent a transient network in the developmental history of consciousness.
Summary
Phenylketonuria is a not uncommon cause of mental deficiency (there are probably 1600 cases in Great Britain alone). On the supposition that the high level of phenylalanine or its breakdown products in the blood and cerebrospinal fluid might be responsible for the mental retardation in this disorder we have treated a two year‐old child with a diet low in phenylalanine. The introduction of this diet was associated with an appreciable improvement in the patient's mental status and a fall in the level of phenylalanine in the blood and urine. When phenylalanine was again given in fairly large amounts there was an immediate and dramatic deterioration in the child's mental and biochemical condition. A similar phenylalanine intake produced no clinical reaction in a control child.
The main source of aminoacids in the diet was an acid casein hydrolysate which was specially treated to remove phenylalanine. The aim of the phenylalanine‐poor diet was to keep the phenylalanine blood level as near the normal range as possible. The preparation of such a diet presents little difficulty if a phenylalanine‐free casein hydrolysate is available. Its value in the treatment of other children is at present being investigated; it seems reasonable to assume that patients in the first two years of life will benefit most.
A description is given of an eight‐year‐old boy with extrasystoles, seizures of muscular weakness, and multiple developmental anomalies (dwarfism, scaphocephalic skull, hypertelorism, bilateral ptosis, low‐set ears, broad nose, mandibular hypoplasia, aplasia of a number of teeth, defect of both the soft and osseous palate, inward bending of the fifth fingers, single transverse palmar crease of both hands, and cryptorchidism). These findings suggest a specific syndrome, but no similar description was found in the literature. The investigations disclosed no signs of either a chromosomal, a neuromuscular, or an endocrine disease.