Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
2001-8-7
pubmed:abstractText
Protection against an experimental challenge infection by immunization with excretory/secretory products (ES) from Haemonchus contortus, containing predominantly proteins of 15 and 24 kDa, depends on the age of the sheep. Vaccinated sheep 9 and 6 months of age had reduced final worm burdens of 82 and 77, respectively. No reduction in worm burden was found in 3-month-old lambs. Nine-month-old sheep had significantly higher ES-specific serum immunoglobulin (Ig)G1 and IgA during immunizations and after challenge infection than 3-month-old lambs. There was no correlation within the 9-month-old sheep between ES-specific IgA or IgG1 levels and protection, measured as worm burden. However, when the different age groups were combined, negative correlations between percentage protection and ES-specific IgA and IgG1 levels after challenge were found. At the end of the experiment, peripheral blood eosinophils and mast cell counts in abomasal tissue were also significantly higher in the vaccinated and challenged 9-month-old sheep than in the vaccinated and challenged 3-month-old or than in the 9-month-old sheep with challenge, but without vaccination. The responses measured in young lambs were similar to the responses in sheep, but the height of these responses was in general of a lower magnitude.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0141-9838
pubmed:author
pubmed:issnType
Print
pubmed:volume
23
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
419-26
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Age-related protective immunity after vaccination with Haemonchus contortus excretory/secretory proteins.
pubmed:affiliation
Institute of Infectious Diseases and Immunology, Department of Parasitology and Tropical Veterinary Medicine, Utrecht University, PO Box 80.165, 3508 TD Utrecht, The Netherlands. l.vervelde@vet.uu.nl
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't