Abstract
BackgroundUreaplasma diversum has been associated with infertility in cows. In bulls, this mollicute colonizes the prepuce and distal portion of the urethra and may infect sperm cells. The aim of this study is to analyze in vitro interaction of U. diversum isolates and ATCC strains with bovine spermatozoids. The interactions were observed by confocal microscopy and the gentamycin internalization assay.FindingsU. diversum were able to adhere to and invade spermatozoids after 30 min of infection. The gentamicin resistance assay confirmed the intracellularity and survival of U. diversum in bovine spermatozoids.ConclusionsThe intracellular nature of bovine ureaplasma identifies a new difficulty to control the reproductive of these animals.
Highlights
Ureaplasma diversum has been associated with infertility in cows
Microscopy of spermatozoids infected with U. diversum The U. diversum strains and isolates were detected on the surface and inside the spermatozoids after 30 min, 3 and 6 h of infection
The surface location and intracellularity of U. diversum in spermatozoid are presented in Figure 2 by sequential sectioning of a series of focal planes
Summary
Ureaplasma diversum has been associated with infertility in cows. In bulls, this mollicute colonizes the prepuce and distal portion of the urethra and may infect sperm cells. U. diversum has been associated with infertility in cows and may result in severe placentitis, fetal alveolitis, abortion or birth of weak calves [2,3]. This ureaplasma can be released through milk, conjunctiva and vaginal secretions and colonize the prepuce of bulls allowing contamination of semen collected from artificial vaginas or be transmitted at sexual intercourse [3,4].
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