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Biomedical subjects

B Courtois

Publications and source records attributed to B Courtois.

7 recordsLinked to original sources
PubMed1992

[Osteoid osteoma of the femoral neck in children: diagnostic problems].

The authors report a case of an osteoid osteoma of the femoral neck in a child, aged 3 1/2. This is a benign bone tumor, frequently painful with variable relief obtained with salicylates. Clinical latency is not exceptional in children, owing to the delayed diagnosis. When located in the femoral neck it is usually discovered after a delay, owing to the misleading clinical signs and the frequently normal standard x rays. The only treatment for cure is the excision of the nidus, which is usually difficult because of the anatomical location and the perioperative adjustment.

Child, Preschool↗
PubMed1991

[Luxation-fractures of the radiocarpal joint. Clinical study of 6 cases and general review].

The authors present a series of six cases of radio-carpal fracture-dislocation, which occurred between 1978 and 1989. The results were analysed with a follow-up of between 3 months and 11 years. This rare lesion (0.2% of all joint dislocations) is often caused by a severe injury, although the mechanism remains obscure. Radiological lesions consist of a combination of anterior or posterior carpal dislocation, fractures of the radial styloid and ulnar styloid processes, fracture of the anterior or posterior lip of the radius. This association of radiological lesion was also found in review of literature so that radio-carpal fracture-dislocation can be considered to be a real and a distinct entity. The authors recommend a surgical treatment, after immediate joint reduction, including stabilization with cancellous screw, sometimes Kirschner wires. However, anatomic reduction must be obtained, to ensure a good functional result.

Adult↗
PubMed1979

[Effect of 2-ketogluconic acid synthesis on the exopolysaccharide production in a Rhizobium meliloti strain].

Two categories of carbon substrates are defined for Rhizobium meliloti: the first favours the synthesis of exopolysaccharides (fructose belongs to this category) while the other is not suitable (glucose belongs to this category). With fructose, resting cells synthesize polysaccharides during more than 100 h and this synthesis is at its best in aerobic conditions at 30 degrees C. With glucose, 2-ketogluconic acid accumulates and rapidly stops the synthesis. The method used to stop this acidification allows with glucose a synthesis which can be compared to the one obtained with fructose.

Culture Media↗
PubMed1975

[A strain of amaril virus isolated from Aedes africanus in the Ivory Coast].

The yellow fever virus has been isolated from a pool of Aedes africanus caught on men in a region situated between forest and savannah near Touba, in the Ivory Coast. This isolation, occurring at an interepidemic period, proves for the first time in West Africa, the part played by this mosquito in the transmission of the yellow fever virus.

Aedes↗
PubMedDate not supplied

[A study of polysaccharides in fast growing "Rhizobium" (author's transl)].

This work is an attempt to use the composition of exopolysaccharides in the Rhizobium genus as a criterium of taxonomic importance. The organisms were first cultured in media and under conditions which led to the production of as many polysaccharides as possible. The medium chosen for proliferation conditions was Wright's medium; for conditions of non-proliferation conditions was Wright's medium; for conditions of non-proliferation, a minimal medium without nitrogen was used. The polysaccharides synthesised in Wright's medium consists in neutral sugars such as glucose, galactose, mannose and sometimes rhamnose and in uronic acid in various quantities. If no mannose is found in the polysaccharides when they are synthesised in non-proliferation conditions and if mannans are found in yeast broth, it may be thought, as suggested by Humphrey, that mannose would come from those mannans. The study of the composition of these polysaccharides enables us to sort out two groups of fast growing Rhizobium. The first one, relatively uniform, corresponds to the strains of R. leguminosarum, trifolii and phaseoli. In these strains, the polysaccharides are made of about 70% of neutral sugars and 20% of glucuronic acid.

Cell Division↗
PubMedDate not supplied

[Sensory sequelae of injuries to the median nerve].

Median nerve wounds are frequent because of the superficial course of this nerve, especially in the wrist. The sensory sequellae of such lesions, either complete or dissociated, represent a major handicap which may be associated to a motor impairment of the external thenar muscles. The curative procedures such as neurolysis and, above all, sutures or grafts, must be very widely used, even some time after the initial injury and in spite of motor reinnervation. The role of palliative surgery is therefore limited, although it is sometimes useful. There are many procedures, which may be summed up by two techniques: use of sensitive neurovascular skin flaps, the most frequent grafts, neurotization of the median nerve with a transfer of sensory rami from the radial nerve, a less-known technique. The treatment of the sensory sequellae of median nerve lesions is primarily based on a good initial management of the nerve lesions by a good-quality emergent microsurgical suture.

Humans↗