PMID: 6636511Aug 1, 1983

Encapsulation of Staphylococcus aureus isolated from bovine milk

Veterinary Microbiology
N L Norcross, J P Opdebeeck

Abstract

Evidence is presented that nearly all Staphylococcus aureus infections of the bovine mammary gland are by encapsulated organisms (94% of isolates examined). This observation is based on the demonstration of diffuse growth in serum-soft agar, of cultures taken directly from mastitic milk without subculture on artificial media. Only milks containing pure cultures of S. aureus were examined. It was previously reported that only 6% had capsules. Evidence is presented that as few as 3 or 4 subcultures and/or a short storage on artificial media results in loss of encapsulation of most S. aureus of bovine origin. Antisera raised against encapsulate strains inhibit the expression of capsule formation on bacteria that are encapsulated in the presence of normal serum.

References

Dec 1, 1987·Veterinary Immunology and Immunopathology·D L Watson
Mar 1, 1991·The Journal of Applied Bacteriology·K R MatthewsS H King
Aug 1, 1991·Zentralblatt für Veterinärmedizin. Reihe B. Journal of veterinary medicine. Series B·W MamoP Jonsson
Jul 1, 1994·Zentralblatt für Veterinärmedizin. Reihe B. Journal of veterinary medicine. Series B·L F Calvinho, K Dodd
Jan 1, 1992·Research in Veterinary Science·R T GreeneM Schmitt
Jul 1, 1991·The Journal of Applied Bacteriology·K R MatthewsA J Guidry
May 1, 1985·Australian Veterinary Journal·I G Colditz, D L Watson
Jan 1, 1988·APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica·B Johne, J Jarp
May 1, 1997·Journal of Dairy Science·J A GiraudoR Nagel
Oct 1, 1991·Journal of Dairy Science·A J GuidryL M Berning
Dec 1, 1991·Journal of Dairy Science·E R Oldham, M J Daley
Aug 24, 2001·Journal of Dairy Science·C N O'BrienD C Westhoff
Jul 15, 1989·FEMS Microbiology Letters·B Grinde
Dec 1, 1992·Zentralblatt für Veterinärmedizin. Reihe B. Journal of veterinary medicine. Series B·V MyllysT Ali-Vehmas

Citations

Feb 1, 1979·The Journal of Applied Bacteriology·K YoshidaC L San Clemente
Oct 1, 1979·The Journal of Applied Bacteriology·K Yoshida, Y Minegishi
Jul 31, 1974·Annals of the New York Academy of Sciences·B B Wiley, N H Maverakis
Nov 1, 1967·The Journal of Experimental Medicine·B LipińskiJ Jeljaszewicz

Related Concepts

Microbial Subculture
Microbial Anatomical Capsule Structure
Agar
Mammary Gland
Thylacodes aureus
Immune Sera
Bos taurus
Polysaccharides, Bacterial
Styrax aureus
Electron Microscopy

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Synapse Loss as Therapeutic Target in MS

As we age, the number of synapses present in the human brain starts to decline, but in neurodegenerative diseases this occurs at an accelerated rate. In MS, it has been shown that there is a reduction in synaptic density, which presents a potential target for treatment. Here is the latest research on synapse loss as a therapeutic target in MS.

Artificial Intelligence in Cardiac Imaging

Artificial intelligence (ai) techniques are increasingly applied to cardiovascular (cv) medicine in cardiac imaging analysis. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

Social Learning

Social learning involves learning new behaviors through observation, imitation and modeling. Follow this feed to stay up to date on the latest research.

Cell Atlas of the Human Eye

Constructing a cell atlas of the human eye will require transcriptomic and histologic analysis over the lifespan. This understanding will aid in the study of development and disease. Find the latest research pertaining to the Cell Atlas of the Human Eye here.

Single Cell Chromatin Profiling

Techniques like ATAC-seq and CUT&Tag have the potential to allow single cell profiling of chromatin accessibility, histones, and TFs. This will provide novel insight into cellular heterogeneity and cell states. Discover the latest research on single cell chromatin profiling here.

Genetic Screens in iPSC-derived Brain Cells

Genetic screening is a critical tool that can be employed to define and understand gene function and interaction. This feed focuses on genetic screens conducted using induced pluripotent stem cell (iPSC)-derived brain cells.