Induction of avirulent variants in Erwinia stewartii by incubation at supraoptimal temperatures

1975 ◽  
Vol 21 (8) ◽  
pp. 1282-1287 ◽  
Author(s):  
A. Garibaldi ◽  
L. N. Gibbins
Keyword(s):  
Zea Mays ◽  
High Temperatures ◽  
Parent Strain ◽  
Small Colony Variants ◽  
Supraoptimal Temperatures ◽  
Small Colony ◽  
Erwinia Stewartii

High temperatures (37 °C) induced non-pigmented, and (or) small colony variants in some Erwinia stewartii strains. The former differed from the parent strain serologically and in having lost virulence to Zea mays. The small colony variants retained phytopathogenicity.

Properties and control of cold-induced small colony variants of Staphylococcus aureus

2020 ◽  
pp. 100874
Author(s):  
Jiaju Qiao ◽  
Mengjiao Zhu ◽  
Yun Fan ◽  
Zhaoxin Lu ◽  
Fengxia Lv ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Small Colony Variants ◽  
Small Colony ◽  
And Control

Small-colony Variants (SCVs) of Staphylococci: A Role in Foreign Body-associated Infections

2007 ◽  
Vol 30 (9) ◽  
pp. 778-785 ◽  
Author(s):  
C. Von Eiff ◽  
K. Becker
Keyword(s):  
Foreign Body ◽  
Defense Mechanisms ◽  
Susceptibility Testing ◽  
Slow Growth ◽  
Clinical Laboratory ◽  
Coagulase Negative Staphylococci ◽  
Small Colony Variants ◽  
The Past ◽  
Small Colony ◽  
Antibacterial Chemotherapy

Staphylococci have various strategies for resisting therapy that extend beyond classic mechanisms. Clinical experience with device-associated infections as well as with infections due to small-colony variants (SCVs) clearly shows that both antibacterial chemotherapy and host defense mechanisms are often unable to eliminate the pathogens and cure these infections. Of particular interest is the fact that in the past few years an increasing number of various foreign body-related infections due to staphylococcal SCVs have been reported. In this overview, the characteristics of SCVs recovered from clinical specimens and of defined mutants displaying the SCV phenotype are described. Their slow growth and changing biochemical and physiological features represent a challenge to clinical laboratory personnel, because recovery, identification, as well as susceptibility testing of these variants need particular efforts. In addition, the reduced susceptibility to aminoglycosides and the ability of SCVs to persist intracellularly require specific attention for the treatment of these infections. Thus, special efforts to search for these variants formed by Staphylococcus aureus or by coagulase-negative staphylococci should be considered when an infection is particularly resistant to therapy, persists for a long period or fails to respond to apparently adequate therapy with antimicrobial compounds.

scholarly journals Intraphagolysosomal conditions predispose to Staphylococcus epidermidis small colony variants persistence in macrophages

PLoS ONE ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. e0207312 ◽  
Author(s):  
Agnieszka Magryś ◽  
Kamil Deryło ◽  
Agnieszka Bogut ◽  
Alina Olender ◽  
Marek Tchórzewski
Keyword(s):  
Staphylococcus Epidermidis ◽  
Small Colony Variants ◽  
Small Colony
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