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Titolo:
TRANSMISSIBILITY OF BACTERIAL ENDOSYMBIONTS BETWEEN ISOLATES OF ACANTHAMOEBA SPP
Autore:
GAUTOM RK; FRITSCHE TR;
Indirizzi:
UNIV WASHINGTON,SCH MED,DEPT LAB MED SB 10 SEATTLE WA 98195 UNIV WASHINGTON,SCH MED,DEPT LAB MED SB 10 SEATTLE WA 98195
Titolo Testata:
The Journal of eukaryotic microbiology
fascicolo: 5, volume: 42, anno: 1995,
pagine: 452 - 456
SICI:
1066-5234(1995)42:5<452:TOBEBI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
INFECTION; PARASITE; DNA;
Keywords:
FREE LIVING AMEBAS; GRANULOMATOUS AMEBIC ENCEPHALITIS (GAE); OPPORTUNISTIC PATHOGEN; RECALCITRANT CORNEAL ULCERATIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
R.K. Gautom e T.R. Fritsche, "TRANSMISSIBILITY OF BACTERIAL ENDOSYMBIONTS BETWEEN ISOLATES OF ACANTHAMOEBA SPP", The Journal of eukaryotic microbiology, 42(5), 1995, pp. 452-456

Abstract

Experimental transmission of two bacterial endosymbionts to symbiont-free isolates of Acanthamoeba spp. was studied to determine specificity of the host-symbiont relationship. Both symbionts originated from amoebic isolates displaying an identical mitochondrial DNA EcoRI fingerprint (group AcUW II). Symbioses were readily established in one amoebic isolate which displayed a homologous mtDNA fingerprint (group AcUW II). Exposure of a heterologous amoebic isolate (group AcUW IV) to the two symbionts resulted in either cell death or encystation without theestablishment of symbioses. While symbioses were established with an amoebic isolate from a second heterologous group (AcUW I), a unique membranous sheath appeared and persisted around one of the symbionts which did not exist in the original host. An isolate representing a thirdheterologous amoebic group (AcUW VI) was variable in its susceptibility with one symbiont unable to infect the host and the other becoming established only after an initial reaction in Which trophozoites rounded-up and floated off the substrate. These studies suggest that a specific recognition system exists between particular isolates of Acanthamoeba and their symbionts, and that the appearance;of a killer phenotype is related to contact between mismatched, though recognized, pairs.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 20:15:01