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679 results on '"De Clercq, D."'

19. Studies on the biology of schistosomiasis with emphasis on the Senegal river basin

Author

Southgate VR, Tchuem Tchuenté L-A, Sène M, De Clercq D, Théron A, Jourdane J, Webster BL, Rollinson D, Gryseels B, and Vercruysse J

Subjects
Schistosoma mansoni, Schistosoma haematobium, Biomphalaria pfeifferi, Senegal river basin, Microbiology, QR1-502, Infectious and parasitic diseases, RC109-216
Abstract

The construction of the Diama dam on the Senegal river, the Manantali dam on the Bafing river, Mali and the ensuing ecological changes have led to a massive outbreak of Schistosoma mansoni in Northern Senegal, associated with high intensity of infections, due to intense transmission, and the creation of new foci of S. haematobium. Data on the vectorial capacity of Biomphalaria pfeifferi from Ndombo, near Richard Toll, Senegal are presented with sympatric and allopatric (Cameroon) S. mansoni. Comparisons are made on infectivity, cercarial production, chronobiology of cercarial emergence and longevity of infected snails. Recent data on the intermediate host specificity of different isolates of S. haematobium from the Lower and Middle Valley of the Senegal river basin (SRB) demonstrate the existence of at least two strains of S. haematobium. The role of Bulinus truncatus in the transmission of S. haematobium in the Lower and Middle Valleys of the SRB is reviewed. Both S. haematobium and S. mansoni are transmitted in the same foci in some areas of the SRB.

Published
2001

21. Experimentally generated footprints in sand: analysis and consequences for the interpretation of fossil and forensic footprints

Author

D'Aout, K., Meert, L., Van Gheluwe, B., De Clercq, D., and Aerts, P.

Subjects
Foot -- Properties, Footprints, Fossil -- Identification and classification, Gait -- Analysis, Walking -- Physiological aspects, Anthropology/archeology/folklore
Abstract

Fossilized footprints contain information about the dynamics of gait, but their interpretation is difficult, as they are the combined result of foot anatomy, gait dynamics, and substrate properties. We explore how footprints are generated in modern humans. Sixteen healthy subjects walked on a solid surface and in a layer of fine-grained sand. In each condition, 3D kinematics of the leg and foot were analyzed for three trials at preferred speed, using an infrared camera system. Additionally, calibrated plantar pressures were recorded. After each trial in sand, the depth of the imprint was measured under specific sites. When walking in sand, subjects showed greater toe clearance during swing and a 7[degrees] higher knee yield during stance. Maximal pressure was the most influential factor for footprint depth under the heel. For other foot zones, a combination of factors correlates with imprint depth, with pressure impulse (the pressure-time integral) gaining importance distally, at the metatarsal heads and the hallux. We conclude that footprint topology cannot be related to a single variable, but that different zones of the footprint reflect different aspects of the kinesiology of walking. Therefore, an integrated approach, combining anatomical, kinesiological, and substrate-mechanical insights, is necessary for a correct interpretation. Am J Phys Anthropol 141:515-525, 2010. [c] 2009 Wiley-Liss, Inc. KEY WORDS ichnology; substrate; foot function; plantar pressure DOI 10.1002/ajpa.21169

Published
2010

35. A prospective study on gait-related intrinsic risk factors for lower leg overuse injuries

Author

Ghani Zadeh Hesar, N., Van Ginckel, A., Cools, A., Peersman, W., Roosen, P., De Clercq, D., and Witvrouw, E.

Subjects
Gait -- Physiological aspects, Gait -- Research, Cumulative trauma disorders -- Risk factors, Cumulative trauma disorders -- Demographic aspects, Cumulative trauma disorders -- Research, Overuse injuries -- Risk factors, Overuse injuries -- Demographic aspects, Overuse injuries -- Research, Leg -- Injuries, Leg -- Risk factors, Leg -- Demographic aspects, Leg -- Research, Repetitive stress injury, Health, Sports and fitness
Published
2009

39. Running economy in early and late maturing youth soccer players does not differ

Author

Segers, V., De Clercq, D., Janssens, M., Bourgois, J., and Philippaerts, R.

Subjects
Running -- Physiological aspects, Running -- Research, Maturation (Psychology) -- Physiological aspects, Maturation (Psychology) -- Research, Teenage athletes -- Psychological aspects, Teenage athletes -- Physiological aspects, Teenage athletes -- Research, Health, Sports and fitness
Published
2008

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