| class="wikitable"
!Species or genera
!Possibly associated cancers
!Ref |
| Bacteroides fragilis
|Colon cancer.
|[{{cite journal|last1=Sinkovics|first1=Joseph|title=Molecular biology of oncogenic inflammatory processes. I. Non-oncogenic and oncogenic pathogens, intrinsic inflammatory reactions without pathogens, and microRNA/DNA interactions (Review)|journal=International Journal of Oncology|year=2011|issn=1019-6439|doi=10.3892/ijo.2011.1248|pmid=22076306|volume=40|issue=2|pages=305–49|doi-access=free}}] |
| Borrelia burgdorferi
|MALT lymphoma.
|[{{cite journal|last1=Chang|first1=A. H.|last2=Parsonnet|first2=J.|author2-link=Julie Parsonnet|title=Role of Bacteria in Oncogenesis|journal=Clinical Microbiology Reviews|volume=23|issue=4|year=2010|pages=837–857|issn=0893-8512|doi=10.1128/CMR.00012-10|pmid=20930075|pmc=2952975}}] |
| Campylobacter jejuni
|Immunoproliferative small intestinal disease (IPSID), which is rare a type of MALT lymphoma.
| |
| Chlamydia pneumonia
|Lung MALT lymphoma.
| |
| Chlamydia trachomatis (chlamydia)
|Cervical cancer.
| |
| Chlamydophila psittaci
|Ocular/adnexal lymphoma (forms of eye cancer).
| |
| Clostridium ssp
|Colon cancer.
| |
| Cutibacterium acnes
|Bladder and prostate cancer.
| |
| Fusobacterium nucleatum
|Colorectal cancer
|[{{Cite journal |last1=Kostic |first1=Aleksandar D. |last2=Chun |first2=Eunyoung |last3=Robertson |first3=Lauren |last4=Glickman |first4=Jonathan N. |last5=Gallini |first5=Carey Ann |last6=Michaud |first6=Monia |last7=Clancy |first7=Thomas E. |last8=Chung |first8=Daniel C. |last9=Lochhead |first9=Paul |last10=Hold |first10=Georgina L. |last11=El-Omar |first11=Emad M. |last12=Brenner |first12=Dean |last13=Fuchs |first13=Charles S. |last14=Meyerson |first14=Matthew |last15=Garrett |first15=Wendy S. |author-link15=Wendy Garrett |date=2013-08-14 |title=Fusobacterium nucleatum potentiates intestinal tumorigenesis and modulates the tumor immune microenvironment |journal=Cell Host & Microbe |volume=14 |issue=2 |pages=207–215 |doi=10.1016/j.chom.2013.07.007 |issn=1931-3128 |pmc=3772512 |pmid=23954159}}] |
| Helicobacter bilis
|Biliary cancers (such as gallbladder and biliary tract cancers).
| |
| Helicobacter bizzozeronii
|Gastric MALT lymphoma.
| |
| Helicobacter felis
|Gastric MALT lymphoma.
| |
| Helicobacter heilmannii
|Marginal zone B-cell lymphoma of the stomach.
|[{{cite journal | vauthors = Schreuder MI, van den Brand M, Hebeda KM, Groenen PJ, van Krieken JH, Scheijen B | title = Novel developments in the pathogenesis and diagnosis of extranodal marginal zone lymphoma | journal = Journal of Hematopathology | volume = 10 | issue = 3–4 | pages = 91–107 | date = December 2017 | pmid = 29225710 | pmc = 5712330 | doi = 10.1007/s12308-017-0302-2 }}] |
| Helicobacter hepaticus
|Biliary cancer.
| |
| Helicobacter pylori
|Stomach cancer, Marginal zone B-cell lymphoma of the stomach, and bile duct cancer
|[{{Cite journal|date=2021-03-01|title=Molecular modelling of the gastric barrier response, from infection to carcinogenesis|url=https://ora.ox.ac.uk/objects/uuid:b1fa0c5d-6294-45c8-98a4-f70c86430b5b/files/rbk128b19t|journal=Best Practice & Research Clinical Gastroenterology|language=en|volume=50-51|pages=101737|doi=10.1016/j.bpg.2021.101737|issn=1521-6918|last1=Traulsen|first1=Jan|last2=Zagami|first2=Claudia|last3=Daddi|first3=Alice Anna|last4=Boccellato|first4=Francesco|pmid=33975688|s2cid=233900318 }}][{{cite journal | vauthors = Bravo D, Hoare A, Soto C, Valenzuela MA, Quest AF | title = Helicobacter pylori in human health and disease: Mechanisms for local gastric and systemic effects | journal = World Journal of Gastroenterology | volume = 24 | issue = 28 | pages = 3071–3089 | date = July 2018 | pmid = 30065554 | pmc = 6064966 | doi = 10.3748/wjg.v24.i28.3071 | doi-access = free }}] |
| Helicobacter salomonis
|Gastric MALT lymphoma.
| |
| Helicobacter suis
|Gastric MALT lymphoma.
| |
| Mycoplasma spp
|Stomach, colon, ovarian, and lung cancers (particularly M. fermentans, M. penetrans, M. hyorhinis).
| |
| Neisseria gonorrhoeae (gonorrhea)
|Bladder cancer and possibly prostate cancer.
| |
| Salmonella enterica serovar Paratyphi
|Biliary cancer.
|[{{Cite journal|last1=Sepe|first1=Ludovico P.|last2=Hartl|first2=Kimberly|last3=Iftekhar|first3=Amina|last4=Berger|first4=Hilmar|last5=Kumar|first5=Naveen|last6=Goosmann|first6=Christian|last7=Chopra|first7=Sascha|last8=Schmidt|first8=Sven Christian|last9=Gurumurthy|first9=Rajendra Kumar|last10=Meyer|first10=Thomas F.|last11=Boccellato|first11=Francesco|date=2020-09-22|editor-last=McClane|editor-first=Bruce A.|title=Genotoxic Effect of Salmonella Paratyphi A Infection on Human Primary Gallbladder Cells|url= |journal=mBio|language=en|volume=11|issue=5|pages=e01911–20, /mbio/11/5/mBio.01911–20.atom|doi=10.1128/mBio.01911-20|issn=2150-7511|pmc=7512552|pmid=32963006}}][{{Cite journal|last1=Boccellato|first1=Francesco|last2=Meyer|first2=Thomas F.|date=June 2015|title=Bacteria Moving into Focus of Human Cancer|journal=Cell Host & Microbe|volume=17|issue=6|pages=728–730|doi=10.1016/j.chom.2015.05.016|pmid=26067598|issn=1931-3128|doi-access=free}}] |
| Salmonella enterica serovar Typhimurium
|Biliary cancer.
|[{{Cite journal|last1=Scanu|first1=Tiziana|last2=Spaapen|first2=Robbert M.|last3=Bakker|first3=Jeroen M.|last4=Pratap|first4=Chandra Bhan|last5=Wu|first5=Lin-en|last6=Hofland|first6=Ingrid|last7=Broeks|first7=Annegien|last8=Shukla|first8=Vijay Kumar|last9=Kumar|first9=Mohan|last10=Janssen|first10=Hans|last11=Song|first11=Ji-Ying|date=June 2015|title=Salmonella Manipulation of Host Signaling Pathways Provokes Cellular Transformation Associated with Gallbladder Carcinoma|journal=Cell Host & Microbe|language=en|volume=17|issue=6|pages=763–774|doi=10.1016/j.chom.2015.05.002|pmid=26028364|doi-access=free}}] |
| Streptococcus bovis
|Colorectal cancer
|[{{Cite journal |last1=Klein |first1=Robert S. |last2=Recco |first2=Rose A. |last3=Catalano |first3=Michela T. |last4=Edberg |first4=Stephen C. |last5=Casey |first5=Joan I. |last6=Steigbigel |first6=Neal H. |date=1977-10-13 |title=Association of Streptococcus bovis with Carcinoma of the Colon |url=http://www.nejm.org/doi/abs/10.1056/NEJM197710132971503 |journal=New England Journal of Medicine |language=en |volume=297 |issue=15 |pages=800–802 |doi=10.1056/NEJM197710132971503 |pmid=408687 |issn=0028-4793|url-access=subscription }}] |
| Treponema pallidum (syphilis)
|Bladder cancer and possibly prostate cancer.
| |
