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Titolo:
ANTIMICROBIAL EFFECT OF WILD STREPTOMYCES STRAINS ISOLATED FROM CHILEAN SOILS
Autore:
GARCIAQUINTANA H; ZAROR L; LEIVA S;
Indirizzi:
CASILLA 167 VALDIVIA CHILE UNIV AUSTRAL CHILE,FAC CIENCIA,INST MICROBIOL VALDIVIA CHILE UNIV AUSTRAL CHILE,FAC MED,INST CLIN MICROBIOL VALDIVIA CHILE
Titolo Testata:
Revista Medica de Chile
fascicolo: 10, volume: 125, anno: 1997,
pagine: 1157 - 1164
SICI:
0034-9887(1997)125:10<1157:AEOWSS>2.0.ZU;2-S
Fonte:
ISI
Lingua:
SPA
Soggetto:
SELECTIVE ISOLATION;
Keywords:
STREPTOMYCES; SOIL MICROBIOLOGY; ANTIINFECTIVE AGENTS; MICROBIOLOGY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
H. Garciaquintana et al., "ANTIMICROBIAL EFFECT OF WILD STREPTOMYCES STRAINS ISOLATED FROM CHILEAN SOILS", Revista Medica de Chile, 125(10), 1997, pp. 1157-1164

Abstract

Background: The soils of the southern part of Chile, that are isolated, cold, humid, poorly oxygenated and with a low acidity could containnew strains of antimicrobial producing Streptomyces. Aim: To demonstrate that the soil of the Southern region of Chile contains Streptomyces strains with antimicrobial activity towards pathogenic bacteria and fungi. Material and methods: Two hundred fifty eight soil and sedimentsamples were collected from 148 places in Southern regions of Chile. They were cultured in Kuster-Williams growth media and the presence ofStreptomyces was confirmed by microscopic examination and biochemicalcharacterization. The antimicrobial activity against reference microorganisms of each wild strain was tested using the disk method Among active Streptomyces strains, 38 with the higher-activity were selected and rested against 142 clinical microorganisms. Results: Seventy seven percent of soils were positive and 542 wild strains of Streptomyces were isolated of these 266 had antimicrobial activity. Fifty three percent of isolates had activity against S aureus 43% against B subtilis and 0.7% against E coli. Most Streptomyces were active against more thanone organism. When there was activity against single organisms, thesewere mostly eucariotic, such as C albicans wild T mentagrophytes. Among clinical microorganisms, 23% of S aureus strains were inhibited while P aeruginosa, Alternaria sp, P vulgaris and Y enterocolitica strains were not inhibited. The most frequent Streptomyces morphotypes were those showing pigmented colonies with flexuous and spiral shaped chains of arthrospores. Conclusions: Soils of the Southern region of Chile allow the growth of abundant native strains of Streptomyces with a promising antimicrobial activity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 09:08:40