Mutual relations of colicinogenic factors and resistance determinants inEscherichia coli

Krčméry, V.; Janousková, J

doi:10.1002/jobm.3630090304

Z Allg Mikrobiol

1969

DOI: 10.1002/jobm.3630090304

|View full text |Cite

Mutual relations of colicinogenic factors and resistance determinants inEscherichia coli

V. Krčméry¹,

J Janousková²

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1969

1971

Publication Types

Select...

Article6

Relationship

Self Cite1

Independent5

Authors

Journals

Cited by 11 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During an investigation of the incidence of tetracycline resistance caused by resistancetransfer factors in enterobacteria isolated from swine feces (7), a loss of colicinogeny was observed in a number of Escherichia coli strains after infection with resistance (R) factors carrying resistance to streptomycin (S) and tetracycline (T). We have extended these findings by studying the effect of two different R factors on colicinogeny of other col strains.…”

mentioning

confidence: 99%

Loss of Colicinogeny inEscherichia coliStrains Infected by Certain Resistance Factors

1970

Self Cite

View full text Add to dashboard Cite

The original observation that in wild-type colicinogenic Escherichia coli strains the introduction of some R factors abolish their colicin production was studied in certain col+ strains bearing well-defined col factors. Two resistance (R) factors were used and introduced by conjugation in these strains, namely the 222 factor of Watanabe and a Salmonella typhimurium ST factor (coding for resistance to streptomycin and tetracycline only). The introduction of above mentioned R factors abolished the colicin production of col+ strains most probably by elimination of col factors. All col factors, however, were not equally susceptible to elimination by the R factors tested, since colicin production in ML strains was abolished by infection by the 222 factor but not by the R factor of S. typhimurium ST, which is able to eliminate other col factors.During an investigation of the incidence of tetracycline resistance caused by resistancetransfer factors in enterobacteria isolated from swine feces (7), a loss of colicinogeny was observed in a number of Escherichia coli strains after infection with resistance (R) factors carrying resistance to streptomycin (S) and tetracycline (T). We have extended these findings by studying the effect of two different R factors on colicinogeny of other col strains.MATERIALS AND METHODS Strains. Colicinogenic strains were as follows. (i) E. coli 2H 1327, a wild-type strain isolated from swine feces, was used. This strains was found to produce colicin B. As recipient strain for transfer of R factors, we used a nalidixic acid-resistant mutant isolated from this strain. (ii) E. coli Y 20 (Col E 1), a lac-strain which produces colicin E 1, was obtained from S. E. Luria. (iii) The following variants of E. coli ML 35 were tested, which were all found to produce colicin E 1: E. coli ML 35 Nx, a nalidixic acid-resistant mutant isolated from lac--sensitive strain, obtained from H. Rosenkranz; E. coli ML 35 Cl, a S-resistant mutant isolated from a S-dependent strain obtained from H. Rosenkranz, resistant to 1,000 ;&g of S per ml; E. coli ML 35 Cl, ile-try-, a deficient mutant isolated from E. coli ML 35 Cl.R-factor-bearing donor strains were as follows. (i) E. coli CHS-2 (222), resistant to S, T, chloramphenicol (C), and the sulfonamides (Su) was used. This is T. Watanabe's donor strain which usually transfers these resistances as a unit (9). It is sensitive to phages T,, T5, and BF23, which can be used for its identification. The resistance levels of this strain on MacConkey agar are 50 Ag of T per ml, 15 ,ug of S per ml, and 100 pg of chloramphenicol per ml. Sulfonamide resistance was not estimated nor checked after transfer. (ii) Salmonella typhimurium 5445, isolated from pig feces (8), transfers an R-factor ST at a frequency of about 10-1 to E. coil 2H 1327 and Y 20. (iii) E. coli K-12 185 ST, which received its R factor from 5445, was used to transfer this ST-determinant to E. coli Y 20 and to E. coli ML strains which are lac-. It is sensitive to phages T1, Tr, and BF23, whereas none of the col+ st...

show abstract

mentioning

confidence: 99%

Loss of Colicinogeny inEscherichia coliStrains Infected by Certain Resistance Factors

1970

Self Cite

View full text Add to dashboard Cite

show abstract

Transferable tetracycline resistance inSalmonella typhimurium andShigella sonnei derived from resistant strains ofEscherichia coli

Krčméry¹,

Seckárová²,

Parráková³

1969

Z Allg Mikrobiol

View full text Add to dashboard Cite

Occurrence of co licinogenic strains among tetracycline resistant strains ofEscherichia coli

Nováková¹,

Stykova²,

Krčméry³

et al. 1969

Z Allg Mikrobiol

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Mutual relations of colicinogenic factors and resistance determinants inEscherichia coli

Cited by 11 publications

References 7 publications

Loss of Colicinogeny inEscherichia coliStrains Infected by Certain Resistance Factors

Loss of Colicinogeny inEscherichia coliStrains Infected by Certain Resistance Factors

Transferable tetracycline resistance inSalmonella typhimurium andShigella sonnei derived from resistant strains ofEscherichia coli

Occurrence of co licinogenic strains among tetracycline resistant strains ofEscherichia coli

Contact Info

Product

Resources

About