Veterinary Science Communications

, Volume 1, Issue 1, pp 307–321 | Cite as

The role of non-specific uterine infection in the infertility of clinically normal repeat-breeder cows

  • P. J. Hartigan
European Community Preview Article

Abstract

The role of non-specific bacteria in the infertility of clinically normal repeat-breeder cows is reviewed, and data are presented from a recent study in which bacteriological and histological samples were taken from the uteri of dairy cows at intervals during the non-gravid period. The evidence does not support the view that endometritis is an important cause of this infertility. In the absence of accurate counts of the bacteria present in the uterus at the time of service and during the subsequent oestrous cycle, it is impossible to determine whether pathogenic bacteria cause the infertility by injuring the gametes or the developing conceptus. A comprehensive quantitative study is needed of the microbiology of the uterus of the repeatbreeder cow at service and during the subsequent oestrous cycle.

Keywords

Alla Infertility Veterinary Medicine Quantitative Study Pathogenic Bacterium 

Kurzfassung

Die Literatur über die Wirkung nichtspezifischer Bakterien auf die Infertilität von klinisch normalen Zuchtkühen wird überarbeitet; da bei werden den Daten aus einer kürzlich durchgeführten Studie, bei der den Uteri von Milchkühen während des gesamten Zeitraums der Nichtträchtigkeit wiederholt Bakterien und Gewebeproben entnommen worden waren, besondere Bedeutung beigemessen. Es konnte kein Beweis für die Annahme erbracht werden, dass Endometritis ein wesen liche Ursache für Unfruchtbarkeit ist. Ohne eine quantitative Untersuchung der Bakterien, die sich während der Deckzeit und dem anschliessendin Brunstzyklus im Uterus befinden, lässt sich nicht feststellen, ob pathogene Bakterien insofern Unfruchtbarkeit verursachen, als sie die Gameten des wachsenden Embryos zerstören oder verletzen. Das vorliegende, nichtquantitative Datenmaterial lässt diesen Schluss nicht zu. Eine umfassende quantitative Untersuchung der Uterusmikrobiologie der Zuchtkuh während der Deckzeit und des folgenden Brunstzyklus ist dringend erforderlich.

Resume

La littérature traitant du rôle des bactéries non spécifiques dans la stérilité de vaches de reproduction multiple cliniquement normales est passée en revue compte tenu notamment des données tirées d'une récente étude au cours de laquelle des échantillons bactériologiques et histologiques ont été prélevés a plusieurs reprises dans l'utérus de vaches laitières durant la période de non-gestation. L'expérience ne nonfirme pas l'opinion selon laquelle l'endométrite est une cause importante de stérilité. En l'absence de données quantitatives sur les bactéries présentes dans l'utérus au moment de la saillie ou durant le cycle oestral ultérieur, il est impossible de déterminer si des bactéries pathogènes provoquent ou non la stérilité en détruisant ou en endommangeant les gamètes ou le produit de la conception en développment. D'après les données non quantitatives disponibles, il ne semble pas qu'il en soit ainsi. Il est nécessaire de mener une étude quantitative complète de la microbiologie de l'utérus de la vache de reproduction multiple au moment de la saillie et pendant le cycle oestral consecutif.

Riassunto

Gli autori esaminano la letteratura riguardante il ruolo dei batteri aspecifici nella sterilità delle fattrici multipare clinicamente normali, in particolare alla luce dei dati forniti da un recente studio durante il quale sono stati effettuati ripetuti prelievi istologici e batteriologici dell'utero di bovine de latte al di fuori del periodo di gravidanza.

I risultati non sono in favore del punto di vista secondo il quale l'endometrite sarebbe una seria causa di sterilità. In assenza di un conteggio quantitativo dei batteri presenti nell' utero al momento della monta o durante il successivo ciclo estrale, è impossibile stabilire se i batteri patogeni sono causa di sterilità distruggendo o danneggiando i gameti o il feto. I dati disponobili, non quantitativi, non corroborano questa tesi. Si segnala la necessità di un esauriente studio quantitativo della microbiologia dell' utero della bovina multipara al momento della monta e durante il successivo ciclo estrale.

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Copyright information

© Elsevier Scientific Publishing Company 1977

Authors and Affiliations

  • P. J. Hartigan
    • 1
  1. 1.Faculty of Verterinary MedicineUniversity of DublinDublin 4(Ireland)

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