Evidence map›Paper›PMID 34946031›Full record

ArticleMicroorganisms2021

Identification of Bull Semen Microbiome by 16S Sequencing and Possible Relationships with Fertility.

Aleksandar Cojkic, Adnan Niazi, Yongzhi Guo, Triin Hallap, Peeter Padrik, Jane M Morrell

Open access · goldAbstract read
In one paragraph

Article in Microorganisms, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
6.9field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 47 citations in OpenAlex.

  1. Microbial Landscape of Bull (Animals : an open access journal from MDPI · 2026
    Article
  2. First Animal Source Metagenome Assembly ofPathogens (Basel, Switzerland) · 2025
    Article
  3. Combining genomics and semen microbiome increases the accuracy of predicting bull prolificacy.Journal of animal breeding and genetics = Zeitschrift fur Tierzuchtung und Zuchtungsbiologie · 2025
    Article
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  7. Describing the Reproductive Microbiome ofAnimals : an open access journal from MDPI · 2024
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

Aleksandar CojkicDepartment of Clinical Sciences, Swedish University of Agricultural Sciences (SLU), 75007 Uppsala, Sweden.ORCID 0000-0001-9127-6579
Adnan NiaziSLU-Global Bioinformatics Centre, Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, 75007 Uppsala, Sweden.
Yongzhi GuoDepartment of Clinical Sciences, Swedish University of Agricultural Sciences (SLU), 75007 Uppsala, Sweden.
Triin HallapEstonian University of Life Sciences, 51014 Tartu, Estonia.
Peeter PadrikAnimal Breeders' Association of Estonia, 79005 Raplamaa, Estonia.
Jane M MorrellDepartment of Clinical Sciences, Swedish University of Agricultural Sciences (SLU), 75007 Uppsala, Sweden.ORCID 0000-0002-5245-7331
Swedish University of Agricultural Sciences · SEEstonian University of Life Sciences · EEVeterinary and Food Board · EE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Reports on the use of 16S sequencing for the identification of bacteria in healthy animals are lacking. Bacterial contamination of bull semen can have a negative effect on the sperm quality. The aims of this study were threefold: to identify bacteria in the semen of healthy bulls using 16S sequencing; to investigate the differences in the bacterial community between individual bulls; and to establish if there was a relationship between the bacteria isolated and bull fertility. Semen from 18 bulls of known fertility was used for the DNA extraction and 16S sequencing; 107 bacterial genera were identified. The differences in the amplicon sequence variants (ASVs) and the numbers of genera between bulls were noted. Negative correlations (

Indexed as

16S sequencingbacteriabull semenfertilitysperm quality

Identifiers

PMID34946031
PMCPMC8705814
OpenAlexW3216482007

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.