Anti-Staphylococcus aureus antibody (ab20920)


  • Product name
    Anti-Staphylococcus aureus antibody
    See all Staphylococcus aureus primary antibodies
  • Description
    Rabbit polyclonal to Staphylococcus aureus
  • Host species
  • Specificity
    Soluble and structural antigens of the whole bacterium. Antiserum is not absorbed for related microorganisms.
  • Tested applications
    Suitable for: ICC/IF, IHC-Frmore details
  • Species reactivity
    Reacts with: Staphylococcus aureus
  • Immunogen

    Staphylococcus aureus strain ATCC 27660 (mixture of intact organisms and lysed cells).



Our Abpromise guarantee covers the use of ab20920 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
ICC/IF Use at an assay dependent concentration.
IHC-Fr Use at an assay dependent concentration. Use with acetone fixed tissues.


  • Relevance
    Staphylococcus aureus are gram-positive bacteria that, although part of the normal flora of humans (nasal passages, skin and mucous membranes), have the potential to become opportunistic pathogens. S. aureus is a frequent cause of a wide range of infections and some bacterial strains have become resistant to many commonly used antibiotics.
  • Alternative names
    • S. aureus antibody


  • ab20920 staining an abscess in rat calf tissue prepared as a 20 µm cryoslice.  Tissue was fixed in paraformaldehyde, permeabilised with 0,5% Trition X100 in PBS, and blocked with 10% serum plus 1% BSA for 1 hour at room temperature.  The primary antibody was diluted 1/500 with PBS plus 3-5% Serum, 0,5% Trition X100 and incubated for 24 hours at 20°C.  An Alexa Fluor® 568 goat anti-rabbit was used as the secondary

    See Abreview

  • ab20920 staining Staphylococcus aureus in human keratinocytes by Immunocytochemistry/ Immunofluorescence.
    Cells were fixed in methanol, permeabilized using 0.1% saponin/ PBS, blocked with 4% BSA for 30 minutes at 25°C and then incubated with ab20920 at 10µg/ml for 14 hours at 4°C. The secondary used was an Alexa-Fluor 488 conjugated goat anti-rabbit polyclonal used at a 1/100 dilution.

    Red: cadherin
    Blue: DAPI
    Green: anti-Staphylococcus aureus (ab20920)

    See Abreview


This product has been referenced in:
  • Chung CY  et al. Simultaneous and quantitative monitoring of co-cultured Pseudomonas aeruginosa and Staphylococcus aureus with antibiotics on a diffusometric platform. Sci Rep 7:46336 (2017). Read more (PubMed: 28402317) »
  • Hanssen AM  et al. Localization of Staphylococcus aureus in tissue from the nasal vestibule in healthy carriers. BMC Microbiol 17:89 (2017). Read more (PubMed: 28381253) »

See all 11 Publications for this product

Customer reviews and Q&As

The Hamza and Li publication BMC Microbiol 14:207 (2014) cites ab20920 as detecting the ATCC 25923 strain so there is evidence it will cross react.

The cells used for the immunogen started out as whole cells that were disrupted by sonication and freeze/thaw cycles. Therefore the immunogen is a mixture of intact Staph aureus organisms and soluble proteins from disrupted cells. This is no record of ...

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Thank you very much for your email.
There is absolutely no problem, the antibody will still work properly in my opinion.
Indeed, we have tested different antibodies, and even after a week at 37 degrees Celcius, the antibodies did not seem to ...

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Thank you for contacting us.

Please find below the information I managed to collect by contacting the sources of the Anti-Staphylococcus aureusand the Anti-Streptococcus agalactiaeantibodies we have in our catalog :


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Thank you for contacting us. Indeed, neither ab68954 nor ab20920 have been tested for immunoprecipitation (IP) yet, but they could theoretically be used in this application. If it is just between the two, I would recommend ab20920 because it is an u...

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Thank you for your enquiry. This antibody has been tested for use by immunofluorescence. It is yet to be determined whether it is suitable for western blot analysis. Therefore we have not generated a lysate for immunoblotting analysis and do not ha...

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The immunogen used to produce ab20920, Rabbit anti Staphylococcus aureus, is a mixture of intact organisms & soluble proteins from disrupted organisms. The cells were disrupted using a combination of sonication and freeze/thaw cycles. The immunogen p...

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Thank you for your enquiry. I checked with the originator of this antibody and it was produced using an immunogen that is a mixture of intact organisms and lysed cells. The antibody will therefore recognize both soluble cytoplasmic antigens and struct...

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