| Table 1. Microbiota assessment depending on seminal quality. Normospermia (normal semen parameters), oligoasternospermia (low concentration and low sperm motility), asternosperm (low sperm motility), azoospermia (absence of sperm in the ejaculate), oligospermia (low concentration of sperm) and leukocytospermia (increase in the number of leukocytes in semen. | |||||
| Author | Year | Number of individuals | Classification according to seminal quality | Microorganisms present in each group | Methodology |
|---|---|---|---|---|---|
| Hou et al. | 2013 | 77 | Healthy sperm donors | Streptococcus; Corynebacterium; Finegoldia; Veillonella; Lactobacillus; Prevotella; Staphylococcus; Anaerococcus; Peptoniphilus |
16 S rRNA gene sequencing and Gram stain |
| Asthenospermia | Prevotella; Peptoniphilus; Lactobacilus; Clostridiales |
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| Oligoasthenospermia | Corynebacterium; Staphylococcus; Finegoldia; Anaerococcus |
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| Oligoasthenozoospermia and severe azoospermia |
Ralstonia; Prevotella; Aerococcus; Gemella |
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| Baud et al. |
|
94 | Normal spermogram parameters |
Staphylococcus; Lactobacillus | 16 S rRNA gene sequencing |
| One or more abnormal parameters |
Prevotella | ||||
| Yang et al. | 2020 | 159 | Control men | Acinetobacter; Pelomonas; Streptococcus; Lactobacillus |
16 S rRNA gene sequencing |
| Oligoasthenospermia | Ralstonia; Bacteriodes; Prevotella; Lactobacillus |
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| Asthenospermia | Sneathia; Ralstonia; Ureaplasma; Aerococcus; Anaerococcus; Corynebacterium |
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| Azoospemia | - | ||||
| Oligospermia | - | ||||
| Yao et al. | 2022 | 87 | control men | Lactobacillus ↑; Streptococcus ↓ | 16 S rRNA gene sequencing |
| Asthenospermia | |||||
| Leukocytospermia | Streptococcus ↑ | ||||
| Asthenospermia and WBC count >1x106ml |
Lactobacillus ↓ | ||||
| Lundy et al. |
2021 | 37 | Control men | Collinsella ↑; Pseudomonas ↓ | 16 S rRNA gene sequencing and shotgun sequencing |
| Men with idiopathic infertility |
Aerococcus ↑; Gardnerella; Prevotella; Pseudomonas; Collinsella ↓ |
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| Puerta Suárez & Cardona Maya |
|
10 | Group control | Rhizobiaceae; Burkholderia; Achromobacter; Delftia; Campylobacter; Ezakiella; Anaerococcus; Prevotella; Haemophilus |
16 S rRNA gene sequencing |
| Prostatitis group | |||||
| Okwelog et al. |
2021 | 36 | Normospermic men | Lactobacillus ↑; Gardnerella; Veillonella; Corynebacterium; Escherichia coli; Hemophilus; Prevotella |
16 S rRNA gene sequencing |
| Men with oligospermia | Prevotella ↑; Escherichia coli; Lactobacillus; Gardnerella |
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