High incidence of oligozoospermia and teratozoospermia in human semen infected with the aerobic bacterium Streptococcus faecalis
Abstract
Bacterial culture of semen samples from 100 male partners in infertile couples revealed the presence of aerobic bacteria in 49 cases. Streptococcus faecalis (Enterococcus) was isolated from 53%, micrococci species from 20% and alpha-haemolytic streptococci from 16% of the infected samples. The incidence of oligozoospermia and teratozoospermia was significantly (P < 0.05) higher in men whose semen samples contained S. faecalis than those whose semen samples contained micrococci or alpha-haemolytic streptococci or those that did not contain bacteria. The mean sperm concentration, as well as the mean percentage of morphologically normal spermatozoa, was significantly (P < 0.03) lower in semen infected with S. faecalis compared with that containing micrococci or alpha-haemolytic streptococci and the uninfected samples. There is a high incidence of semen infection with S. faecalis, and it is associated with compromised semen quality in terms of sperm concentration and morphology. The presence of micrococci or alpha-haemolytic streptococci does not appear to have any detrimental effect on sperm quality.
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Exposure to infection or bacteria also showed contradictory results.
“Exposure to infection or bacteria also showed contradictory results.”
From Isolated teratozoospermia: revisiting its relevance in male infertility: a narrative review (2024) · cites this paper as [62]
Mehta et al. found that the rate of teratozoospermia was significantly higher in men with S. faecalis compared to semen that contained micrococci, alpha-hemolytic streptococci, or those that did not contain bacteria at all.
“Mehta et al. found that the rate of teratozoospermia was found to be significantly higher in men with S. faecalis compared to semen that contained micrococci, alpha-hemolytic streptococci or those that did not contain bacteria at all (62).”
From Isolated teratozoospermia: revisiting its relevance in male infertility: a narrative review (2024) · cites this paper as [62]
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Isolated teratozoospermia: revisiting its relevance in male infertility: a narrative review
Atmoko, W., Savira, M., Shah, R., Chung, E., & Agarwal, A. (2024) · Translational Andrology and Urology · doi:10.21037/tau-23-397 · Cited by 23 · see citing works
“Mehta et al. found that the rate of teratozoospermia was found to be significantly higher in men with S. faecalis compared to semen that contained micrococci, alpha - hemolytic streptococci or those that did not contain bacteria at all (62).”
- Authors
- Mehta, R., Sridhar, H., Kumar, B. V., & Kumar, T. A.
- Affiliations
- Kidwai Memorial Institute of Oncology (IN)
- Venue
- Reproductive BioMedicine Online
- Publisher
- Elsevier BV
- Published
- 2002-01
- Volume
- 5
- Issue
- 1
- Pages
- 17-21
- ISSN
- 1472-6483 (ISSN-L)
- OpenAlex
- W2064687939
- Cited by
- 54
- References
- 0
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 1 · 2023: 5 · 2022: 7 · 2021: 8 · 2020: 3 · 2019: 1 · 2018: 5 · 2017: 4 · 2016: 2 · 2015: 4 · 2012: 2
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Reproductive BioMedicine Online (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
- Life Sciences › Immunology and Microbiology › Microbiology › Reproductive tract infections research
- Health Sciences › Medicine › Rheumatology › Urologic and reproductive health conditions
- Keywords
- oligozoospermia, teratozoospermia, Enterococcus faecalis, Enterococcus, male infertility, semen quality, sperm concentration, sperm morphology, micrococci, alpha-hemolytic streptococci
- MeSH terms
- Adult, Humans, Infertility, Male, Male, Oligospermia, Semen, Spermatozoa, Streptococcal Infections, Enterococcus faecalis, Incidence
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