ABSTRACT
RESUMEN Ralstonia pickettii es un bacilo gram negativo de baja virulencia que puede asociarse a infecciones relacionadas a los cuidados de la salud y provocar bacteriemias. La bacteriemia por Ralstonia pickettii es poco frecuente pero se relaciona con la contaminación de productos de uso médico principalmente en pacientes inmunodeprimidos. Presentamos dos casos en pacientes en hemodiálisis crónica vinculados a contaminación del agua de diálisis. Se han publicado casos similares vinculados a la administración de fluídos intravenosos, ampollas de medicación, asociado a membranas de circulación extracorpórea, entre otros. La detección de una bacteriemia por Ralstonia pickettii, debe sospechar e iniciar la búsqueda de productos de uso médico contaminados, fluídos y/o medicación.
ABSTRACT Ralstonia pickettii is a low-virulence gram-negative bacillus that may be associated with infections related to health care and may cause bacteremia. Ralstonia pickettii bacteremia is uncommon but is related to the contamination of medical products, mainly in immunodepressed patients. We present two cases of patients on chronic hemodialysis with Ralstonia pickettii bacteremia linked to contamination of the dialysis water. Similar cases have been published with links to intravenous fluid administration, medication ampules, and the use of extracorporeal oxygenation membranes, among other factors. The detection of Ralstonia pickettii bacteremia should provoke suspicion and a search for contaminated medical products, fluids, and/or medications.
Subject(s)
Humans , Male , Aged , Dialysis Solutions/standards , Renal Dialysis/adverse effects , Gram-Negative Bacterial Infections/etiology , Bacteremia/etiology , Ralstonia pickettii/isolation & purification , Cross Infection/etiology , Cross Infection/microbiology , Gram-Negative Bacterial Infections/microbiology , Bacteremia/microbiology , Middle AgedABSTRACT
Introducción: Helicobacter pylori es uno de los agentes asociado al cáncer gástrico y posee una alta prevalencia en los países en vías de desarrollo. Sus rutas de transmisión no han sido totalmente establecidas; sin embargo, en algunos estudios se ha detectado su ADN en muestras de aguas residuales, subterráneas y superficiales. El objetivo de este trabajo fue detectar el ADN del género Helicobacter en muestras provenientes de acueductos rurales del municipio San Cristóbal y el Acueducto Regional del Táchira (ART). Materiales y métodos: Se recolectaron 500 ml de seis acueductos rurales y el ART. Se determinó la presencia de ADN del género Helicobacter a través de PCR y PCR semianidada con la posterior secuenciación de los productos de reacción. Resultados y discusión: El género Helicobacter no fue detectado mediante PCR, pero se observó la banda esperada en tres muestras mediante una PCR semianidada. La secuenciación de dos amplicones mostraron una similitud del 99% con Ralstonia pickettii, indicando que Helicobacter no fue detectada en los acueductos muestreados. Conclusiones: La secuenciación de los amplicones para el género Helicobacter, mostraron que se trata de R. pickettii un patógeno oportunista, con características similares a H. pylori.
Background: Helicobacter pylori is one of the agents associated with gastric cancer and has high prevalence in developing countries. Its routes of transmission have not been fully established, however, some studies have detected H. pylori DNA in wastewater, groundwater and surface water. The aim of our study was detect H. pylori DNA in water samples from rural water supplies of San Cristóbal and the Tachiras Regional Water Supply (TRWS). Materials and methods: Water (500 ml) of six rural water supplies and the TRWS were collected. T DNA of Helicobacter genus was detected by Polimerase Chain Reaction (PCR) and seminested PCR and the PCR amplicons were sequenced. Results: Helicobacter genus PCR results were negative but the seminested PCR were positive in three samples. However the two amplicons sequenced showed a 99% similitud with Ralstonia pickettii. Conclusions: Helicobacter amplicon sequenced, showed a high similarity with R. pickettii, an oportunist pathogen, with similar characteristics to H. pylori.
ABSTRACT
A multidrug‑resistant clinical isolate of Ralstonia pickettii from a woman was analysed. Modified Hodge test was positive for carbapenemase production. Conjugation experiment revealed the presence of conjugative plasmid of >140 Kb size typed as IncN type. This is the first report of emergence blaVIM‑2 in R. pickettii in India.
ABSTRACT
INTRODUCTION: To prevent hemodialysis-related infections, it is important to maintain hemodialysis system without microbial contamination. In May 2003, routine surveillance showed that dialysis water from dialysis port was contaminated with bacteria. To identify the causes of the contamination, we conducted an investigation as follows. METHODS: Patients undergoing dialysis were carefully monitored to see whether evidences of pyrogenic reactions or infections were present. Factors that could have influence on bacterial contamination in hemodialysis systems were thoroughly examined. In addition, microbiologic surveillances were done 7 times in 1 month. RESULTS: Although pyrogenic reactions or bacteremia did not occur, R. pickettii was repeatedly isolated above the Association for the Advancement of Medical Instrumentation (AAMI) standards from almost all dialysis units. Bacterial counts of specimens were higher in the proximal part of the water supply tube than the other parts in all dialysis machines. The colony count of R. pickettii exceeded the maximum level of technical limit in the specimens collected from the dialysis machines in the early morning after intermission of 48 hours. The structure of the supply tube was suspected as the origin of the colonization because stagnant water is a reservoir for bacterial multiplication. After remodeling the structure of the water supply tube, neither R. pickettii nor any other bacteria were isolated. CONCLUSION: Our investigation successfully identified the source of R. pickettii contamination of reverse osmosis water. Appropriate corrective measures for water distribution systems of hemodialysis center could prevent outbreak of dialysis-associated illnesses.