Biomedical subjects

S Abdalla

Publications and source records attributed to S Abdalla.

41 records · Page 3Linked to original sources

PubMed1980

The anaemia of P. falciparum malaria.

The haematological changes in a group of young Gambian children with P. falciparum malaria have been analysed. In children with acute infection anaemia was most marked during the period after treatment. Although many of these patients developed a positive direct Coombs test during this period of the illness it is not clear whether the anaemia which occurs after treatment has an immune basis. A second group of children showed quite different haematological findings. They appear to have a more chronic form of P. falciparum malaria infection, were profoundly anaemic at presentation, showed gross dyserythropoietic changes in their bone marrows, and had a full reticulocyte response and rise in haemoglobin after treatment. A third group of children were encountered whose haematological abnormalities were intermediate to those of the acute and chronic groups. These findings indicate that the patho-physiological mechanisms responsible for the anaemia of P. falciparum malaria are different at different stages of the illness.

Anemia↗

PubMed1980

Evaluation of an AutoAnalyzer method for quantitating anti-A and anti-B haemagglutinins in factor VIII preparations.

The continuous flow principle employed in the Technicon AutoAnalyzer has been adapted for the assay of anti-A and anti-B. The method has an acceptable degree of reproducibility and has been used, principally, for the quantitation of anti-A and anti-B in factor VIII concentrates of intermediate activity. It is, however, a method that can be applied to the assay of these antibodies in serum samples.

ABO Blood-Group System↗

PubMedDate not supplied

Malarial drug trials.

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Antimalarials↗

PubMedDate not supplied

Umbilical vein and placental vessels from newborns with hereditary haemorrhagic telangiectasia type 1 genotype are normal despite reduced expression of endoglin.

Hereditary haemorrhagic telangiectasia, HHT, is an autosomal dominant disorder that affects approximately 1 in 8000 people. HHT1 is associated with mutations in the ENG (Endoglin) gene and with haploinsufficiency. The disorder is characterized by focally dilated vessels, which can lead to arteriovenous malformations and serious complications even in young children. In the current study, umbilical cord and placenta samples from newborns with ENG mutations were analyzed to estimate the level of corresponding protein and look for potential vascular dysplasia. We confirmed, using metabolic labelling and flow cytometry, that endoglin levels were significantly reduced to median values of 47 per cent (range 32-56 per cent) and 58 per cent (46-90 per cent), respectively, in human umbilical vein endothelial cells derived from newborns with ENG mutations (HHT1 group; n=18) relative to samples from newborns shown not to have the familial mutation (non-HHT group). We also quantified the relative expression of endoglin by estimating the endoglin/PECAM-1 staining ratio in tissue sections. We observed significantly lower values in the HHT1 group, compared to the non-HHT group for the umbilical vein (n=9; median 0.6 vs 0.9; ranges 0.2-1.0 and 0.5-1.5) and for placental stem villus vessels (n=9 and 10; median 0.42 vs 0.93; ranges 0.24-0.58 and 0.56-1.18). No differences in the estimated umbilical vein cross-sectional area and in the proportion of vessels present in placental villi were observed in sections from the HHT1 group relative to the non-HHT group. Thus, blood vessels from HHT1 individuals are maintained intact in the umbilical vein and placenta during pregnancy and delivery, despite a significant reduction in endoglin expression.

Antigens, CD↗

PubMedDate not supplied

Oral rehydration therapy for low birth weight neonates suffering from diarrhea in the intensive care unit.

A total of 62 low birth weight (LBW) neonates (29 boys and 33 girls) suffering from diarrhea in our neonatal intensive care unit were included in this period of intense observation. The mean age was 13.89 +/- 13.22 days and average body weight was 1,500.49 +/- 281.45 g. Severity of dehydration was assessed by the Fortin-Parent score. When the score was less than 8 (mild to moderate hypovolemia), oral rehydration therapy (ORT) was administered by feeding bottle or nasogastric tube hourly. Severely hypovolemic neonates needed intravenous rehydration; 52 neonates received ORT only using the World Health Organisation (WHO) formula; 58 neonates received either cow's milk-based or soy-based formula within 12 h after ORT began, and the rest within 24 h. Diarrhea lasted less than 1 day in 92% of cases. The regimen corrected hyponatremia and hypernatremia. Only two neonates developed mild asymptomatic hypernatremia. No child became edematous. Using the WHO solution, ORT was safely given to LBW neonates, sparing painful and potentially hazardous invasive techniques, and resulted in excellent outcomes.

Body Weight↗