Increased establishment of lungworms after exposure to a combined infection of Ostertagia ostertagi and Cooperia oncophora.
Three-month-old calves were infected three times weekly during a 5-week period with Cooperia oncophora, Ostertagia ostertagi or a combination of these two species. For each type of infection two dose levels were applied. In addition one group of calves was kept uninfected. After removal of the primary infection by anthelmintic treatment all calves were challenged with lungworm larvae and slaughtered 5 weeks later. The groups receiving either C. oncophora or O. ostertagi as a monospecific infection did not differ from the naïve controls. The group receiving the combination of both species differed significantly from the other groups, the establishment of the lungworms being 177%, and the faecal excretion of larvae being 325% of that of the other groups.
Kloosterman
A
A
Department of Animal Husbandry, Agricultural University, Wageningen, The Netherlands.
Ploeger
H W
HW
Frankena
K
K
D000704:Analysis of Variance; D000818:Animals; D000909:Antibodies, Helminth / Q000032:analysis; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology*; D004021:Dictyocaulus / Q000276:immunology / Q000302:isolation & purification; D004022:Dictyocaulus Infections / Q000209:etiology*; D004797:Enzyme-Linked Immunosorbent Assay; D005243:Feces / Q000469:parasitology; D005260:Female; D007814:Larva / Q000302:isolation & purification; D008297:Male; D010029:Ostertagiasis / Q000150:complications / Q000662:veterinary*; D012119:Respiration; D012744:Sex Ratio; D014252:Trichostrongyloidiasis / Q000150:complications / Q000662:veterinary*; D015430:Weight Gain
D000909:Antibodies, Helminth