<i>Yersinia Enterocolitica</i>: A Panoramic View of a Charismatic Microorganism

Ej, Bottone

doi:10.3109/10408417709102312

Cited by 333 publications

(190 citation statements)

References 76 publications

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“…Além dessas e outras características, a hidrólise da esculina é um critério importante na diferenciação fenotípica entre cepas patogênicas (esculina negativa) e não patogênicas (esculina positiva) (Bottone 1977). Através das análises realizadas no presente trabalho a maioria das cepas suínas revelou-se esculina negativa sendo consideradas potencialmente patogênicas e apenas uma era fermentadora de esculina e provavelmente não é patogênica.…”

Section: Resultsunclassified

“…A espécie é largamente disseminada no ambiente e em diversos animais: répteis, anfíbios, aves e mamíferos. Os suínos são considerados reservatórios, porque os mesmos sorotipos humanos são encontrados na orofaringe e nas fezes desses animais (Bottone 1977). No Brasil, Y. enterocolitica tem sido encontrada no homem, e em animais (cães e suínos), enfermos ou sadios, na água e vários tipos de alimentos (leite, carne e derivados, vegetais) principalmente nos Estados de São Paulo, Rio de Janeiro e Rio Grande do Sul (Ceccarelli et al 1990, Nunes & Ricciardi 1986, Tassinari et al 1994, Warnken et al 1987.…”

Section: Introductionunclassified

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MARCADORES DE PATOGENICIDADE EM Yersinia enterocolitica O: 3 ISOLADAS DE SUÍNOS DO RIO DE JANEIRO

Leal

Leal²,

Almeida³

1997

Pesq. Vet. Bras.

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Foi realizada a caracterização genotípica e fenotípica de fatores de patogenicidade em 16 amostras de Yersinia enterocolitica O:3 isoladas de suínos sadios do Rio de Janeiro. Foi observado que apenas 6 cepas possuíam o plasmídio de virulência, pYV (+ 70 kb) e apresentavam dependência ao cálcio no meio MOX a 37C. Um plasmídio críptico de cerca de 8,6 kb foi encontrado em uma cepa. Doze cepas revelaram sensibilidade à pesticina enquanto que apenas três se revelaram capazes de hidrolisar a esculina. Através de PCR com "primers" específicos, foi constatada a presença dos genes ail em 14 cepas, irp2, em 1 cepa e a ausência de psaA em todas as cepas analisadas. Quanto aos quimioterápicos, a quase totalidade das cepas mostrou-se ao mesmo tempo resistente à ampicilina e carbenicilina e sensível ao sulfazotrin e à cefoxitina. As respostas foram variadas frente ao cloranfenicol, tetraciclina, kanamicina, gentamicina e ácido nalidíxo.

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Section: Resultsunclassified

Section: Introductionunclassified

MARCADORES DE PATOGENICIDADE EM Yersinia enterocolitica O: 3 ISOLADAS DE SUÍNOS DO RIO DE JANEIRO

Leal

Leal²,

Almeida³

1997

Pesq. Vet. Bras.

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“…frederikseni diarrhoea (Scholey and Freeman, 1984), the authors speculated that the organism might be a cause of antibiotic-associated diarrhoea. Other clinical manifestations of yersiniosis may also include pharyngitis (Tacket et al, 1983) fever, arthritis and erythema nodosum (Bottone, 1977) which may occur in the absence of, or following, gastrointestinal symptoms. The availability of clinical information in this survey was limited to the details given on the request forms, and follow-up of positive cases was hampered by the time lapse involved in cold enrichment methods.…”

Section: Discussionmentioning

confidence: 99%

“…During the last 20 years, Yersinia enterocolitica has 'become accepted as a causative agent of bacterial gastro-enteritis, terminal ileitis and mesenteric adenitis (Bottone, 1977 ;Lancet, 1984). Infection may also lead to several auto-immune conditions, in particular erythema nodosum and polyarthritis (Ah0 et al, 1981 ;Winblad, 1981).…”

Section: Introductionmentioning

confidence: 99%

Human carriage of Yersinia spp.

Greenwood

Hooper

1987

Journal of Medical Microbiology

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Summary. Examination of faecal specimens for the presence of Yersinia spp. during a 1 -year period yielded isolations from 3.5% of patients. Salmonella spp., Campylobacter spp. and Shigella spp. were isolated from 2.5%, 2.8% and 0.34% of patients respectively. Most isolates belonged to Y . enterocolitica biotype 1 (53%) and Y . frederikseni (39%). The most frequently encountered serotypable strains were serotypes 0 5,27 and 0 6,30. Serotype 0 3, the commonly recognised pathogenic strain, was not isolated in this survey. A strong association between Yersinia excretion and the age group 1-14 years was demonstrated. Although biotype-1 strains and Y. frederikseni have not previously been thought to be pathogenic, clinical significance could be attributed to the presence of Yersinia spp. in almost 90% of patients aged 15 years or more, and in over 50% of patients in the younger age groups.

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“…Infection with Yersinia enterocolitica is an important and still increasing cause of gastroenteritis in humans and is sometimes complicated by septicaemia or by the risk of subsequent reactive arthritis (Bottone, 1977;Aho et al, 1981;Carniel and Mollaret, 1990;Ostroff, 1995). Y. enterocolitica is considered to be mainly a food-borne pathogen, and pork products are suspected as being the most likely source of infection (Schiemann, 1989;Kapperud, 1991;Nesbakken, 1992).…”

Section: Introductionmentioning

confidence: 99%

The psychrotrophic bacterium Yersinia enterocolitica requires expression of pnp, the gene for polynucleotide phosphorylase, for growth at low temperature (5°C)

Goverde

Veld

Kusters

et al. 1998

Molecular Microbiology

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SummaryThe psychrotrophic bacterium Yersinia enterocolitica is characterized by temperature-dependent adaptations. To investigate Y. enterocolitica genes involved in cold adaptation, a mutant restricted in its ability to grow at 5ЊC was isolated from a transposon mutant library. The transposon insertion site in this psychrotrophy-defective (PD) mutant mapped 16 bp upstream of an open reading frame whose predicted amino acid sequence showed 93% similarity with the Escherichia coli exoribonuclease polynucleotide phosphorylase (PNPase), encoded by pnp. Expression of this gene was blocked in the PD mutant. However, the introduction of a second copy of pnp, including 0.33 kbp sequences upstream of its coding region, into the chromosome of the PD mutant restored pnp expression as well as the ability to grow at 5ЊC. Furthermore, the expression of pnp appeared to be temperature dependent: in the parental Y. enterocolitica strain, the levels of both pnp mRNA and PNPase were 1.6-fold higher at 5ЊC compared with 30ЊC. A similarly enhanced level of PNPase at 5ЊC was observed in the merodiploid recombinant strain, which indicates that the 0.33 kbp region upstream of pnp harboured a cold-inducible promoter. A putative cold shock promoter motif (ATTGG) was observed in this region.

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Yersinia Enterocolitica: A Panoramic View of a Charismatic Microorganism

Cited by 333 publications

References 76 publications

MARCADORES DE PATOGENICIDADE EM Yersinia enterocolitica O: 3 ISOLADAS DE SUÍNOS DO RIO DE JANEIRO

MARCADORES DE PATOGENICIDADE EM Yersinia enterocolitica O: 3 ISOLADAS DE SUÍNOS DO RIO DE JANEIRO

Human carriage of Yersinia spp.

The psychrotrophic bacterium Yersinia enterocolitica requires expression of pnp, the gene for polynucleotide phosphorylase, for growth at low temperature (5°C)

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