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Título:
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Dynamics of Coxiella burnetii antibodies and seroconversion in a dairy cow herd with endemic infection and excreting high numbers of the bacterium in the bulk tank milk
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Autor/a:
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Nogareda, Carmina; Serrano, Beatriz; García Ispierto, Irina; López Gatius, Fernando; Almería, S.
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Notas:
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Possible factors related to seropositivity and seroconversion to Coxiella burnetii were examined in a dairy
herd with a high Coxiella-seroprevalence and high excretion levels of the bacterium in the bulk tank milk.
Antibodies were detected by using a commercial ELISA test in 50.7% of 603 parous cows. The likelihood of
C. burnetii seropositivity significantly increased by factors of 1.87 and 1.61 for cows in their first and second
terms of pregnancy, respectively, compared to non-pregnant cows. In 478 cows tested twice
12 months apart, the seroconversion rate was 5%. The likelihood of C. burnetii-seroconversion was 2.27
times lower in multiparous than in primiparous cows and 6.88 times higher in cows during their first
90 days in milk than dry-off cows. Our findings indicated a higher seroprevalence in the first and second
terms of pregnancy, and that seroconversion mainly occurred in primiparous cows during their first
90 days in milk.
This work was supported by Spanish CICYT Grant AGL2010- 21273-C03/GAN |
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Materia(s):
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-Coxiella burnetti
-Q fever
-Dairy cows
-Zoonosis |
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Derechos:
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(c) Elsevier Ltd, 2012
info:eu-repo/semantics/restrictedAccess |
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Tipo de documento:
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article
publishedVersion |
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Editor:
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Elsevier
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Compartir:
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