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M. Chan, G. Medley, D. Jamison, D. Bundy (1994)
The evaluation of potential global morbidity attributable to intestinal nematode infectionsParasitology, 109
J. Boes, A. Helwigh (2000)
Animal models of intestinal nematode infections of humansParasitology, 121
A. Roepstorff, K. Murrell (1997)
Transmission dynamics of helminth parasites of pigs on continuous pasture: Ascaris suum and Trichuris suis.International journal for parasitology, 27 5
C. McSharry, Yu Xia, C. Holland, M. Kennedy (1999)
Natural Immunity to Ascaris lumbricoidesAssociated with Immunoglobulin E Antibody to ABA-1 Allergen and Inflammation Indicators in ChildrenInfection and Immunity, 67
Joseph Urban, H. Alizadeh, Robert Romanowski (1988)
Ascaris suum: development of intestinal immunity to infective second-stage larvae in swine.Experimental parasitology, 66 1
P. Nejsum, S. Thamsborg, H. Petersen, H. Kringel, M. Fredholm, A. Roepstorff (2009)
Population dynamics of Trichuris suis in trickle-infected pigsParasitology, 136
A. Galvani (2005)
AGE-DEPENDENT EPIDEMIOLOGICAL PATTERNS AND STRAIN DIVERSITY IN HELMINTH PARASITES, 91
Antti Oksanen, L. Eriksen, A. Roepstorff, B. Ilsøe, P. Nansen, Peter Lind (1990)
Embryonation and Infectivity of Ascaris suum Eggs. A Comparison of Eggs Collected from Worm Uteri with Eggs Isolated from Pig FaecesActa Veterinaria Scandinavica, 31
E. Frontera, A. Carrón, F. Serrano, A. Roepstorff, D. Reina, I. Navarrete (2003)
Specific systemic IgG1, IgG2 and IgM responses in pigs immunized with infective eggs or selected antigens of Ascaris suumParasitology, 127
H. Slotved, E. Barnes, L. Eriksen, A. Roepstorff, Peter Nansen, Henrik Bjørn (1997)
Use of an Agar-gel Technique for Large Scale Application to Recover Ascaris suum Larvae from Intestinal Contents of PigsActa Veterinaria Scandinavica, 38
K. Murrell, L. Eriksen, P. Nansen, H. Slotved, T. Rasmussen (1997)
Ascaris suum: a revision of its early migratory path and implications for human ascariasis.The Journal of parasitology, 83 2
I. Saeed, A. Roepstorff, T. Rasmussen, M. Hog, G. Jungersen (2001)
Optimization of the Agar-gel Method for Isolation of Migrating Ascaris suum Larvae From the Liver and Lungs of PigsActa Veterinaria Scandinavica, 42
S. Williams-Blangero, J. VandeBerg, J. Subedi, B. Jha, R. Corrêa-Oliveira, J. Blangero (2008)
Localization of multiple quantitative trait loci influencing susceptibility to infection with Ascaris lumbricoides.The Journal of infectious diseases, 197 1
P. Nejsum, A. Roepstorff, Claus Jørgensen, M. Fredholm, H. Göring, Timothy Anderson, S. Thamsborg (2009)
High heritability for Ascaris and Trichuris infection levels in pigsHeredity, 102
H. Mejer, A. Roepstorff (2006)
Ascaris suum infections in pigs born and raised on contaminated paddocksParasitology, 133
A. Roepstorff, O. Nilsson, A. Oksanen, B. Gjerde, S. Richter, E. Ortenberg, D. Christensson, K. Martinsson, P. Bartlett, P. Nansen, L. Eriksen, O. Helle, S. Nikander, K. Larsen (1998)
Intestinal parasites in swine in the Nordic countries: prevalence and geographical distribution.Veterinary parasitology, 76 4
L. Eriksen (1990)
Ascaris suum: Influence of Egg Density on in Vitro Development from Embryonated Egg to Infective StageActa Veterinaria Scandinavica, 31
N. Miquel, A. Roepstorff, Mick Bailey, L. Eriksen (2005)
Host immune reactions and worm kinetics during the expulsion of Ascaris suum in pigsParasite Immunology, 27
P. Lind, L. Eriksen, P. Nansen, O. Nilsson, A. Roepstorff (1993)
Response to repeated inoculations with Ascaris suum eggs in pigs during the fattening period. II. Specific IgA, IgG, and IgM antibodies determined by enzyme-linked immunosorbent assay.Parasitology research, 79 3
O. Ronéus (1966)
Studies on the aetiology and pathogenesis of white spots in the liver of pigs.Acta veterinaria Scandinavica, 7
A. Helwigh, C. Christensen, A. Roepstorff, P. Nansen (1999)
Concurrent Ascaris suum and Oesophagostomum dentatum infections in pigs.Veterinary parasitology, 82 3
D. Elkins, Melissa Haswell (1989)
The weight/length profiles of Ascaris lumbricoides within a human community before mass treatment and following reinfectionParasitology, 99
A. Roepstorff, L. Eriksen, H. Slotved, Peter Nansen (1997)
Experimental Ascaris suum infection in the pig: worm population kinetics following single inoculations with three doses of infective eggsParasitology, 115
A. Roepstorff, O. Nilsson, C. O'Callaghan, Antti Oksanen, B. Gjerde, S. Richter, E. Ortenberg, D. Christensson, P. Nansen, L. Eriksen, Graham Medley (1999)
Intestinal parasites in swine in the Nordic countries: multilevel modelling of Ascaris suum infections in relation to production factorsParasitology, 119
W. Peng, X. Cui, X. Zhou (2002)
Comparison of the structures of natural and re-established populations of Ascaris in humans in a rural community of Jiangxi, ChinaParasitology, 124
R. Jung (1954)
The predominance of single-brood infections in human ascariasis.The Journal of parasitology, 40 4
L. Eriksen, Peter Nansen, A. Roepstorff, Peter Lind, O. Nilsson (1992)
Response to repeated inoculations with Ascaris suum eggs in pigs during the fattening period. I. Studies on worm population kinetics.Parasitology research, 78 3
G. Jungersen, L. Eriksen, A. Roepstorff, P. Lind, E. Meeusen, T. Rasmussen, P. Nansen (1999)
Experimental Ascaris suum infection in the pig: protective memory response after three immunizations and effect of intestinal adult worm populationParasite Immunology, 21
J. Boes, G. Medley, L. Eriksen, A. Roepstorff, P. Nansen (1998)
Distribution of Ascaris suum in experimentally and naturally infected pigs and comparison with Ascaris lumbricoides infections in humansParasitology, 117
J. Boes, P. Nansen, L. Stephenson (1997)
False-positive Ascaris suum egg counts in pigs.International journal for parasitology, 27 7
Michael Larsen, A. Roepstorff (1999)
Seasonal variation in development and survival of Ascaris suum and Trichuris suis eggs on pasturesParasitology, 119
A. Hall, K. Anwar, A. Tomkins, Lutfar Rahman (1999)
The distribution of Ascaris lumbricoides in human hosts: a study of 1765 people in Bangladesh.Transactions of the Royal Society of Tropical Medicine and Hygiene, 93 5
The population dynamics of Ascaris suum was studied by long-term exposure of pigs to infective eggs. The pigs were experimentally inoculated with 25 A. suum eggs/kg/day, and 7, 8, and 8 pigs were necropsied at weeks 4, 8, and 14 postinoculation (PI), respectively. Despite the fact that the pigs were continuously reinfected, dramatic reductions in numbers of liver lesions (white spots) and migrating lung larvae were observed as a function of time. However, even at the end of the study, a few larvae were able to complete migration, but these larvae seemed unable to mature in the small intestine. Thus, the adult worm population seemed to consist of worms from the first part of the exposure period. The noticeable decrease in number of white spots suggests that the level of exposure is not reflected in the number of white spots in the late phase of a continuous infection. The serum levels of A. suum L 3 -specific IgG1 and IgA were significantly elevated by week 4 PI, after which the antibody levels declined. The population dynamics and parasite regulating mechanisms are discussed for A. suum in pigs as well as for the closely related species A. lumbricoides in humans.
Journal of Parasitology – Allen Press
Published: Oct 1, 2009
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