Abstract
BackgroundReproductive disorders associated with chlamydial infection have been reported worldwide in cattle and there are indications of potential venereal transmission.MethodsSemen samples from 21 dairy bulls and cauda epididymidis tissue samples from 43 beef bulls were analysed for chlamydial agent by real-time polymerase chain reaction (PCR) including an internal amplification control (mimic). Additionally, presence of antibodies against Chlamydophila (Cp.) abortus among the bulls was investigated with the commercial Pourquier® ELISA Cp. abortus serum verification kit.ResultsNo chlamydial agent was detected by PCR in either the semen samples or in the tissue samples. Additionally, no antibodies against Cp. abortus were detected.ConclusionsThe results suggest that Cp. abortus is very rare, or absent in Swedish bulls and thus the risk for venereal transmission of chlamydial infection through their semen is low. However, because Chlamydophila spp. infection rates seem to differ throughout the world, it is essential to clarify the relative importance of transmission of the infection through semen on cattle fertility.
Highlights
Reproductive disorders associated with chlamydial infection have been reported worldwide in cattle and there are indications of potential venereal transmission
Reproductive disorders such as sporadic abortions and reduced fertility, linked with chlamydial infection have been reported from Germany [2,3], Great Britain [4], Italy [5], Japan [6], Switzerland [7], Taiwan [8] and the USA [9]
The aim of this study was to investigate the presence of chlamydial agent in semen and in tissue of cauda epididymidis and to estimate the seroprevalence of Cp. abortus in Swedish bulls
Summary
Reproductive disorders associated with chlamydial infection have been reported worldwide in cattle and there are indications of potential venereal transmission. Bovine chlamydiosis has been associated with several disease manifestations [1]. Reproductive disorders such as sporadic abortions and reduced fertility, linked with chlamydial infection have been reported from Germany [2,3], Great Britain [4], Italy [5], Japan [6], Switzerland [7], Taiwan [8] and the USA [9]. Chlamydial infection in bulls may be the cause to some of these problems [10]. The vaginal mucosa in sheep and uterine mucosa in cattle are susceptible to infection [15,16] and transmission of
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