BACKGROUND: @entity7246 is a disease caused by @entity15694 , a hemoprotozoa that can affect @entity291 . In South America, the sanguineous form is mechanically transmitted from one @entity1 host (ruminant) to another by the bite of a blood-sucking insect or by needles contaminated with infected blood. The negative impact of the @entity8143 caused by T. vivax infection on the reproductive activity of male and female ruminants is known to reduce fertility. In males, alterations such as degeneration, diffuse or interlobular inflammatory infiltrate found in ovine and @entity291 testicles, can affect fertility through decreased sperm quality. This study evaluated the impact of @entity281 with T. vivax on @entity7040 bulls from the Central Station of Artificial Insemination (CSAI) with regard to libido and the negative effects caused by this protozoan on semen quality. METHODS: Blood samples of 44 animals were collected to evaluate the presence of the trypomastigote form of T. vivax in blood smears obtained from hematocrit and buffy coat, and antibody titer IgG anti T. vivax in indirect Immunoflorescence (IFI). Furthermore, data related to libido, ejaculate volume, spermatic concentration, and seminal vigor were recorded for these animals employing the criteria of the CSAI. RESULTS: Nine animals (20.45  %) showed T. vivax trypomastigotes and @entity5895 between 0.02 and 0.07, and antibody titers from 1:80 to 1:320 in IFI. Twenty nine negative animals in parasitological tests were not reactive in IFI, and six animals presented the antibodies IgG anti T. vivax in IFI. Data on reproductive activity showed that animals infected with T. vivax have a decreased libido and an increased spermatic volume, whereas other factors related to the reproductive process such as spermatic concentration, motility and spermatic force, were unchanged in infected bulls. CONCLUSIONS: The T. vivax infection in @entity7040 bulls from CSAI caused patent @entity5895 , induced a febrile state, promoted reduction in the libido and increased the ejaculate volume. These conditions together may account to decrease the performance of these animals.

Evaluation of parameters related to libido and semen quality in XXXX bulls naturally infected with Trypanosoma vivax.

@entity7246 :: ('MESH:D014352', 'Disease') :: ['Trypanosomiasis'] @entity1 :: ('9606', 'Species') :: ['mammalian'] @entity281 :: ('MESH:D007239', 'Disease') :: ['natural infection'] @entity7040 :: ('9915', 'Species') :: ['Zebu'] @entity5895 :: ('MESH:D018512', 'Disease') :: ['parasitemia'] @entity15694 :: ('MESH:D016780', 'Disease') :: ['Trypanosoma (Dutonella) vivax'] @entity8143 :: ('MESH:D063726', 'Disease') :: ['parasitosis'] @entity291 :: ('9913', 'Species') :: ['bovine', 'bovines']
@entity7040 :: (9915,Species) :: ['Zebu']
