The Outcome of Immediate Administration of Dexamethasone in Children With Croup (Laryngotracheobronchitis) in King Abdullah Specialized Children's Hospital.

Background Croup is an inflammatory disease that affects the upper respiratory tract involving the upper airways of the lungs (bronchial tubes), vocal cords (larynx), and windpipe (trachea). In Canada, it is considered one of the major causes of respiratory diseases in the first 10 years of life. A wide range of viruses like common cold and flu (influenza) infections can cause croup (laryngotracheobronchitis). Dexamethasone has been commonly used to treat croup even though it lacks evidence on patients' recovery. The study aimed to compare the effect of the immediate or late dexamethasone administration on patient recovery and identify predictors for relapse among children with croup. Methods A retrospective cross-sectional study was conducted using the electronic medical record (Best Care) of all croup patients between 2014 and 2018 in King Abdullah Specialized Children's Hospital (KASCH), in Riyadh, Saudi Arabia. Out of the 329, only 186 patients matched our inclusion criteria. Statistical analysis was conducted with the SPSS V.22 software package (IBM Corp., Armonk, NY). The main outcome variable was early recovery or relapse. The chi-square test and logistic regression were used to assess the relationship between the independent variables with recovery or relapse among croup patients. A p-value of <0.05 was used to determine the significance of the test. Results Fifty-three recovered out of the 186 patients. Moreover, 50 of the recovered patients were treated in the ER. In addition, out of the 53 patients who recovered, 40 patients were treated as inpatients (IPs). Those who were given dexamethasone immediately for both recovery and relapsed groups were 29% and 71%, respectively while those who were given dexamethasone late were 34% for the recovery group. On the other hand, 119 patients relapsed. Out of those patients who relapsed, 111 were treated in the ER. Moreover, out of relapsed patients, 79 patients were treated as IPs. Furthermore, out of 186 patients, 86 had chronic illnesses. Twenty-four percent (24%) of those with chronic illnesses recovered, and 76% relapsed (P-value=0.04). Also, there was a significantly higher trend of administration of dexamethasone immediately in the ER in 69% of children with a p-value <0.001. Conclusion In conclusion, the difference between the early and late administration of dexamethasone in both recovery and relapse is not significant. Also, the presence of chronic illnesses affects relapses more significantly.

Morphological cladistic analysis of eight popular Olive (Olea europaea L.) cultivars grown in Saudi Arabia using Numerical Taxonomic System for personal computer to detect phyletic relationship and their proximate fruit composition.

Varietal identification of olives is an intrinsic and empirical exercise owing to the large number of synonyms and homonyms, intensive exchange of genotypes, presence of varietal clones and lack of proper certification in nurseries. A comparative study of morphological characters of eight olive cultivars grown in Saudi Arabia was carried out and analyzed using NTSYSpc (Numerical Taxonomy System for personal computer) system segregated smaller fruits in one clade and the rest in two clades. Koroneiki, a Greek cultivar with a small sized fruit shared arm with Spanish variety Arbosana. Morphologic analysis using NTSYSpc revealed that biometrics of leaves, fruits and seeds are reliable morphologic characters to distinguish between varieties, except for a few morphologically very similar olive cultivars. The proximate analysis showed significant variations in the protein, fiber, crude fat, ash and moisture content of different cultivars. The study also showed that neither the size of fruit nor the fruit pulp thickness is a limiting factor determining crude fat content of olives.

Molecular phylogeny of date palm (Phoenix dactylifera L.) cultivars from Saudi Arabia by DNA fingerprinting.

Genetic diversity among 13 different cultivars of date palm (Phoenix dactylifera L.) of Saudi Arabia was studied using random amplified polymorphic DNA (RAPD) markers. The screening of 140 RAPD primers allowed selection of 37 primers which revealed polymorphism, and the results were reproducible. All 13 genotypes were distinguishable by their unique banding patterns produced by 37 selected primers. Cluster analysis by the unweighted paired group method of arithmetic mean (UPGMA) showed two main clusters. Cluster A consisted of five cultivars (Shehel, Om-Kobar, Ajwa, Om-Hammam and Bareem) with 0.59-0.89 Nei and Li's coefficient in the similarity matrix. Cluster B consisted of seven cultivars (Rabeeha, Shishi, Nabtet Saif, Sugai, Sukkary Asfar, Sukkary Hamra and Nabtet Sultan) with a 0.66-0.85 Nei and Li's similarity range. Om-Hammam and Bareem were the two most closely related cultivars among the 13 cultivars with the highest value in the similarity matrix for Nei and Li's coefficient (0.89). Ajwa was closely related with Om-Hammam and Bareem with the second highest value in the similarity matrix (0.86). Sukkary Hamra and Nabtet Sultan were also closely related, with the third highest value in the similarity matrix (0.85). The cultivar Barny did not belong to any of the cluster groups. It was 34% genetically similar to the rest of the 12 cultivars. The average similarity among the 13 cultivars was more than 50%. As expected, most of the cultivars have a narrow genetic base. The results of the analysis can be used for the selection of possible parents to generate a mapping population. The variation detected among the closely related genotypes indicates the efficiency of RAPD markers over the morphological and isozyme markers for the identification and construction of genetic linkage maps.