Infección de un muñón por Leuconostoc spp, reporte de un caso y revisión de la literatura / Infection of a stump by Leuconostoc, a case report and review of the literature

Resumen La infección del muñón después de amputaciones traumáticas tiene una prevalencia hasta del 34%. Las bacterias más frecuentemente aisladas son Staphylococcus aureus, Enterobacterales como Escherichia coli; Pseudomonas aeruginosa, entre otras. Estas infecciones ocurren por la inoculación directa en el momento del trauma o por gérmenes nosocomiales; la realización de curaciones de las heridas con emplastos vegetales es una práctica aún frecuente en zonas rurales de nuestro país pero su relación con infección del sitio operatorio ha sido poco explorada en la literatura. Leuconostoc spp. es un coco Gram positivo encontrado en territorio agrícola y utilizado en la industria de alimentos. Se presenta un caso de infección de un muñón transfemoral por Leuconostoc, después de una amputación traumática del miembro inferior en una paciente previamente sana con una posible asociación a curaciones con emplastos vegetales.

Abstract Infection of a traumatic amputation stump has a prevalence of 34%. The most common bacteria isolated are Staphylococcus aureus, Pseudomonas aeruginosa and Enterobacterales such as Escherichia coli. These infections occur by direct inoculation in the moment of the trauma or by nosocomial germs. Infections secondary to manipulation of the wounds with vegetable plasters have few case reports in the literature. Leuconostoc spp. is a Gram-positive coccobacillus commonly found in agricultural territory and used in the food industry. There are few case reports in the literature about bone infections by Leuconostocs pp. We present a case of an infection of the operative site of a transfemoral stump by Leuconostoc spp. after a traumatic amputation of the lower limb in a previously healthy patient who had a possible association to cures with vegetable plasters.

Antimicrobial activity of characterized Leuconostoc spp. as novel probiotics isolated from Oreochromis spp. (red tilapia) against fish pathogen Edwardsiella tarda

Aims@#This study aimed to isolate and characterize putative new probiotic with antimicrobial properties against common fish pathogens from the gut of Oreochromis spp. (red tilapia). @*Methodology and results@#A total of 28 colonies were isolated from gut of Oreochromis spp. and characterized phenotypically. Eight isolates were selected for probiotic characterization. Temperature, salinity, pH and bile salt tolerance, antibiotic susceptibility and antimicrobial test against selected fish pathogens (Aeromonas hydrophila, Edwardsiella tarda and Staphylococcus aureus subsp. aureus ATCC 25923) were conducted. Characterization studies revealed isolates suited for freshwater environment and exhibited tolerance against wide range of salinity, pH and bile salt. Isolates displayed different antibiotic susceptibility profile, with six exhibited antimicrobial properties against E. tarda. Molecular identification based on 16S rRNA gene sequencing showed 99.44%, 98.59% and 91.21% sequence similarity with Leuconostoc pseudomesenteroides strain 3832T, Leuconostoc lactis strain KCC202369T and Leuconostoc mesenteroides strain 4332T, respectively as compared to known sequence in the GenBank. When identified Leuconostoc spp. were coated on feed pellets, no major decrease in viability over 21 days of storage at 4 °C were observed, with an average of 8 log CFU/mL.@*Conclusion, significance and impact of study@#The characterized species allow further application assessment of the probiotic-supplemented tilapia feed. Host-originated Leuconostoc displayed potential antimicrobial properties against fish pathogen E. tarda. The isolates Leuconostoc is expected to provide protective effect for Oreochromis spp. against edwardsiellosis and to exert beneficial effects more efficiently as compared to commercial probiotics which are not specifically target for Oreochromis spp., thereby indirectly helping fish farmers in achieving economic sustainability and increase affordability of fish.

Do Kimchi and Cheonggukjang Probiotics as a Functional Food Improve Androgenetic Alopecia? A Clinical Pilot Study

Minocycline and Its Impact on Microbial Dysbiosis in the Skin and Gastrointestinal Tract of Acne Patients

Characteristics of Vegetable Juice Fermented with Lactobacillus plantarum MKHA15 and Leuconostoc mesenteroids MKSR

The objective of this study was to develop fermented vegetable juices that possess antidiabetic and antioxidant activities. Lactobacillus plantarum MKHA15 (MKHA15) and Leuconostoc mesenteroides MKSR (MKSR) were applied to ferment onion, cabbage, and tomato juices at 37℃ and 30℃ for 72 h, respectively, and their functionality was tested using the 12 h hour-fermented juice by MKHA15, and 48 h hour-fermented juice by MKSR. Inhibition of α-glucosidase activity was observed in all fermented juices. The onion juice fermented by MKHA15 showed significantly higher α-glucosidase inhibition activity compared to other juices. All juices showed more than 70% inhibition of α-amylase activity. The DPPH radical scavenging activity of onion juice fermented by MKSR showed significantly lower activity than cabbage and tomato juices; however, no difference was observed between the types of starter cultures. The SOD-like activity of cabbage juice fermented by MKSR was the highest among the fermented juices. The juices fermented by MKHA15 showed higher reducing power than those by MKSR. Therefore, we believe that cabbage, onion and tomato juice fermented by MKHA15 and MKSR would be useful in probiotic juices, as they possess antidiabetic and antioxidant activities.

Lactobacillus plantarum-derived Extracellular Vesicles Protect Atopic Dermatitis Induced by Staphylococcus aureus-derived Extracellular Vesicles

PURPOSE: The microbial environment is an important factor that contributes to the pathogenesis of atopic dermatitis (AD). Recently, it was revealed that not only bacteria itself but also extracellular vesicles (EVs) secreted from bacteria affect the allergic inflammation process. However, almost all research carried out so far was related to local microorganisms, not the systemic microbial distribution. We aimed to compare the bacterial EV composition between AD patients and healthy subjects and to experimentally find out the beneficial effect of some bacterial EV composition METHODS: Twenty-seven AD patients and 6 healthy control subjects were enrolled. After urine and serum were obtained, EVs were prepared from samples. Metagenomic analysis of 16s ribosomal DNA extracted from the EVs was performed, and bacteria showing the greatest difference between controls and patients were identified. In vitro and in vivo therapeutic effects of significant bacterial EV were evaluated with keratinocytes and with Staphylococcus aureus-induced mouse AD models, respectively. RESULTS: The proportions of Lactococcus, Leuconostoc and Lactobacillus EVs were significantly higher and those of Alicyclobacillus and Propionibacterium were lower in the control group than in the AD patient group. Therefore, lactic acid bacteria were considered to be important ones that contribute to the difference between the patient and control groups. In vitro, interleukin (IL)-6 from keratinocytes and macrophages decreased and cell viability was restored with Lactobacillus plantarum-derived EV treatment prior to S. aureus EV treatment. In S. aureus-induced mouse AD models, L. plantarum-derived EV administration reduced epidermal thickening and the IL-4 level. CONCLUSIONS: We suggested the protective role of lactic acid bacteria in AD based on metagenomic analysis. Experimental findings further suggest that L. plantarum-derived EV could help prevent skin inflammation.

Bacteremia caused by Leuconostoc species : 6-case series / 고신대학교의과대학학술지

Leuconostoc species are Gram-positive coccobacilli and are used in dairy products and are intrinsically resistant to vancomycin. Leuconostoc infections are rare in humans, usually occurring in immune-compromised patients. We describe 6 patients with Leuconostoc bacteremia at Dong-A university hospital between 1990 and 2015. One isolate (L. lactis) was identified to species level using 16S rRNA gene sequencing analysis. All patients had underlying diseases and 5 patients underwent procedures that interrupted the normal integumentary defense. Four patients died within 30 days after being identified as carrying Leuconostoc species.

Interruptions of nurses' activities and patient safety: an integrative literature review / Interrupções de atividades de enfermeiros e a segurança do paciente: revisão integrativa da literatura / Interrupciones de actividades de enfermeros y la seguridad del paciente: revisión integradora de la literatura

OBJECTIVES: to identify characteristics related to the interruption of nurses in professional practice, as well as to assess the implications of interruptions for patient safety. METHOD: integrative literature review. The following databases were searched: Pubmed/Medline, LILACS, SciELO and Cochrane Library, using the descriptors interruptions and patient safety. An initial date was not established, but the final date was December 31, 2013. A total of 29 papers met the inclusion criteria. RESULTS: all the papers included describe interruptions as a harmful factor for patient safety. Data analysis revealed three relevant categories: characteristics of interruptions, implications for patient safety, and interventions to minimize interruptions. CONCLUSION: interruptions favor the occurrence of errors in the health field. Therefore, there is a need for further studies to understand such a phenomenon and its effects on clinical practice. .

OBJETIVOS: identificar características relacionadas à interrupção de enfermeiros em sua prática profissional, bem como avaliar as implicações para a segurança do paciente. MÉTODO: foi realizada revisão de literatura do tipo integrativa, com busca nas bases de dados Pubmed/Medline, LILACS, SciELO e Biblioteca Cochrane, utilizando os descritores interruptions e patient safety. A data inicial não foi limitada e a data final foi 31 de dezembro de 2013, identificando-se 29 artigos que atenderam aos critérios de inclusão. RESULTADOS: todos os artigos revisados descreveram a interrupção como fator prejudicial à segurança do paciente. A análise destes estudos revelou três categorias relevantes: características da interrupção, implicações da interrupção para a segurança do paciente e intervenções para minimizar as interrupções. CONCLUSÃO: a interrupção favorece a ocorrência de erros na saúde. Assim, notou-se necessidade de novas pesquisas para compreender tal fenômeno e seus efeitos na prática clínica. .

OBJETIVOS: identificar características relacionadas a la interrupción que sufren los enfermeros en su práctica profesional, así como evaluar las implicaciones para la seguridad del paciente. MÉTODO: fue realizada una revisión de literatura de tipo integradora, con búsqueda en las bases de datos Pubmed/Medline, LILACS, SciELO y Biblioteca Cochrane, utilizando los descriptores interruptions y patient safety. La fecha inicial no fue limitada y la fecha final fue 31 de diciembre de 2013, se identificaron 29 artículos que atendieran a los criterios de inclusión. RESULTADOS: todos los artículos revisados describieron la interrupción como un factor perjudicial a la seguridad del paciente. El análisis de estos estudios reveló tres categorías relevantes: características de la interrupción, implicaciones de la interrupción para la seguridad del paciente e intervenciones para minimizar las interrupciones. CONCLUSIÓN: la interrupción favorece la ocurrencia de errores en la salud. Así, se notó la necesidad de realizar nuevas investigaciones para comprender ese fenómeno y los efectos del mismo en la práctica clínica. .

Peritonitis Due to Leuconostoc Species in a Patient Receiving Continuous Ambulatory Peritoneal Dialysis / 계명의대학술지

Leuconostoc species are gram-positive cocci and they are rarely pathogenic in human. Leuconostoc infections are commonly associated with immunocompromised status and indwelling medical devices include intravenous catheter, tracheostomy, endotracheal intubation and percutaneous endoscopic gastrostomy. Clinical isolates of Leuconostoc were frequently misidentified, usually as viridans streptococci, but they possess inherent resistance to vancomycin despite sensitivity to most other antibiotics. We present a case of Leuconostoc peritonitis in patients receiving continuous ambulatory peritoneal dialysis (CAPD). A 48-year-old man with hypertensive nephropathy has been treated with peritoneal dialysis, developed peritonitis due to Leuconostoc species. The peritonitis was poorly responded to empirical antibiotics. He was successfully treated with intraperitoneal administration of ampicillin. The dialysis catheter was left in place, and continued to function. To our knowledge, this is the first case of Leuconostoc peritonitis reported in Korea.

Biological characteristics and probiotic effect of Leuconostoc lactis strain isolated from the intestine of black porgy fish

A strain of lactic acid bacteria, Leuconostoc lactis, was isolated from the intestinal tract of black porgy, Sparus macrocephalus, and identified by conventional biochemical characteristics and 16S rDNA gene sequence analysis. The isolated strain had the ability of bile tolerance and resistance to low pH, and survived well in the trypsinase and pepsin solution. But the highly concentrated dose of trypsinase and pepsin affect the viability of the isolated strain. The isolate was resistant to several antibiotics, including Cephalothin, Ceftriaxone, Imipenem and Tobramycin. The isolate could autoaggregate itself and coaggregate with other bacteria in vitro. The autoaggregation percentage increased to 23.29% after 20 h of incubation. The percentage of coaggregation were respectively 31.21%, 29.44%, 10.74%, 16.49%, 24.36%, 24.41% and 20.99% for Vibrio parahaemolyticus, Listeria monocytogenes, Escherichia coli O157, Salmonella typhimurium, Shigella, Staphylococcus aureus and Proteusbacillus vulgaris after 20 h incubation of a mixed suspension. The supernatant of the strain inhibited the growth of several pathogens, such as V.parahaemolyticus, Vibrio harveyi, Vibrio alginolyticus, Staphylococcus aureus, Escherichia coli O157, Salmonella typhimurium, Bacillus subtilis, Proteusbacillus vulgaris and Shigella. These results indicated that the isolate, Leuconostoc lactis, might be an attractive candidate for perspectival strain for probiotics in marine aquaculture.

Production of D-mannitol by metabolically engineered Escherichia coli / 生物工程学报

D-Mannitol has wide applications in food, pharmaceutical, and chemical industries. In this study, we constructed a genetically stable Escherichia coli strain for D-mannitol production by integrating mannitol dehydrogenase (mdh) and fructose permease (fupL) genes of Leuconostoc pseudomesenteroides ATCC 12291 into chromosome of E. coli ATCC 8739 and inactivating other fermentation pathways (including pyruvate formate-lyase, lactate dehydrogenase, fumarate reductase, alcohol dehydrogenase, methylglyoxal synthase and pyruvate oxidase). Using mineral salts medium with glucose and fructose as carbon sources, the engineered strain could produce 1.2 mmol/L D-mannitol after anaerobic fermentation for 6 days. Based on the coupling of cell growth and D-mannitol production, metabolic evolution was used to improve D-mannitol production. After evolution for 80 generations, D-mannitol titer increased 2.6-fold and mannitol dehydrogenase activity increased 2.8-fold. Genetically stable strains constructed in this work could ferment sugars to produce D-mannitol without the addition of antibiotics, inducers and formate, which was favorable for industrial production.

Sepsis por Leuconostoc spp. en un lactante sano / Sepsis by Leuconostoc spp. in a healthy infant

El género Leuconostoc, del grupo de bacterias ácido-lácticas, son cocos grampositivos resistentes a vancomicina, distribuidos en la naturaleza y empleados en la industria alimentaria. Clásicamente considerado inocuo para la especie humana, se lo ha implicado en diversas patologías en sujetos susceptibles; se lo aisló cada vez con más frecuencia y con un amplio perfil de patogenicidad, por lo que en la actualidad se clasifica como patógeno oportunista emergente. Los niños son especialmente vulnerables, sobre todo prematuros y afectos de patología digestiva grave. La puerta de entrada no ha sido estudiada en profundidad; las más probables son la digestiva, en intestinos alterados, y la cutánea, a través de la pérdida de su integridad.Otras formas descritas son contaminaciones de la nutrición parenteral y enteral, esta última asociada sobre todo al uso de sondas gástricas. Los aislados casos descritos en pacientes inmunocompetentes sin factores de riesgo involucran, sobre todo, a lactantes sanos, como el caso que presentamos.

Leuconostoc garlicum: An unusual pathogen in the era of vancomycin therapy.

Leuconostoc garlicum, belonging to the family of Leuconostocaceae, is a catalase-negative, Gram-positive ovoid cocci, intrinsically resistant to vancomycin. Clinical infection by Leuconostoc garlicum is rare. We report a case of respiratory tract infection subsequent to vancomycin therapy.

Bioconversion of ginsenoside Rb1 into compound K by Leuconostoc citreum LH1 isolated from kimchi

About 40 different types of ginsenoside (ginseng saponin), a major pharmacological component of ginseng, have been identified along with their physiological activities. Among these, compound K has been reported to prevent the development of and the metastasis of cancer by blocking the formation of tumors and suppressing the invasion of cancerous cells. In this study, ginsenoside Rb1 was converted into compound K via interaction with the enzyme secreted by ¥â-glucosidase active bacteria, Leuconostoc citreum LH1, extracted from kimchi. The optimum time for the conversion of Rb1 to compound K was about 72 hrs at a constant pH of 6.0 and an optimum temperature of about 30¨¬C. Under optimal conditions, ginsenoside Rb1 was decomposed and converted into compound K by 72 hrs post-reaction (99 percent). Both TLC and HPLC were used to analyze the enzymatic reaction. Ginsenoside Rb1 was consecutively converted to ginsenoside Rd, F2, and compound K via the hydrolyses of 20-C ¥â-(1 ¡æ 6)-glucoside, 3-C ¥â-(1 ¡æ 2)glucoside, and 3-C ¥â-glucose of ginsenoside Rb1.

A Case of Bacteremia Caused by Leuconostoc garlicum

Although Leuconostoc species have rarely been isolated from clinical specimens, this organism may cause invasive infections such as bacteremia and meningitis in immunocompromised patients. We report a case of Leuconostoc garlicum bacteremia in an 84-year-old male with hemovac catheter placement, vancomycin therapy, and inflammatory enterocolitis as underlying risk factors.

A Case of Bacteremia Caused by Leuconostoc garlicum

Although Leuconostoc species have rarely been isolated from clinical specimens, this organism may cause invasive infections such as bacteremia and meningitis in immunocompromised patients. We report a case of Leuconostoc garlicum bacteremia in an 84-year-old male with hemovac catheter placement, vancomycin therapy, and inflammatory enterocolitis as underlying risk factors.

Leuconostoc sp en pacientes con cáncer: Estudio descriptivo / Leuconostoc sp in cancer patients: A descriptive study

Las especies de Leuconostoc son patógenas oportunistas informadas en muy baja frecuencia, que se pueden encontrar en pacientes críticamente enfermos, inmunocomprometidos y con infecciones intra-hospitalarias. Generalmente, se asocian a bacteriemia por dispositivos intra-vasculares y al uso de nutrición parenteral total. Sin embargo, también se han descrito otras infecciones asociadas, dentro de las que se cuentan meningitis, osteomielitis, infección del torrente sanguíneo, de vías urinarias y peritonitis. En este artículo se describe una serie de pacientes con cáncer en quienes se identificó este microorganismo, las condiciones clínicas asociadas y se hace una revisión de la literatura.

The species of Leuconostoc are uncommon opportunistic pathogens, which can be isolated in critically ill patients, immunocompromised hosts and in nosocomial infections. They are mostly isolated in bacteremia associated to intravascular devices and to the use of total parenteral nutrition. Nevertheless, other infections due to Leuconostoc sp have been described among which, meningitis, bloodstream infections, urinary tract infections and peritonitis have been reported. In this article we describe a series of cancer patients with Leuconostoc sp infections and their associated clinical conditions, and a literature review is presented.

Bacteriemia por leuconostoc citreum en trauma craneoencefálico grave por proyectil de arma de fuego / Leuconostoc citreum bacteremia in severe head trauma by firearm missile

Se presenta el caso de un paciente con trauma craneoencefálico grave por proyectil de arma de fuego a quien se le documentó en el curso de su enfermedadbacteriemia por Leuconostoc citreum. Se presenta y se discute la evolución del paciente y su manejo antibiótico. Se discute la probable vía de entrada del germen al torrente sanguíneo y se revisa la literatura mundial. Lo inusual del caso motivó a los autores a publicarlo.

A case of severe head trauma by firearm missilesis presented; bacteremia by Leuconostoc citreumwas documented in the course of the disease. Theclinical course of the patient and the antibiotictreatment are presented and discussed. The pro-bable route of contamination and the entrance ofthe bacteria into the blood stream are discussedand the worldwide literature is reviewed. Therarity of this case encouraged the authors topublish it

Infección por Leuconostoc en pacientes con síndrome de intestino corto, nutrición parenteral y alimentación enteral continua / Leuconostoc infcctions in patients with short gut syndrome, parenteral nutrition and continuous enteral feeding

Leuconostoc is a grampositive cocci, quite ubiquitous in nature. It is used in wine industry, and for aroma and texture of dairy products. Occasionally it has been isolated from humans in cases of bacteremia, catheter associated infections, sepsis, meningitis, pneumonia, UTI, osteomyelitis and hepatic dysfunction. Short bowel syndrome, patients with CVC and patients with gastrostomy undergoing enteral feeding, are described amongst the factors associated with this infection. The isolation of a grampositive cocci, that does not hydrolyze arginine and that is resistant to vancomycin leads to this diagnostic possibility. Antibiotic treatment: penicillin or ampicillin.

Leuconostoc es una cocácea grampositiva parecida a los Streptococcus, que se encuentra ampliamente distribuida en la naturaleza; es usada en la industria de vinos, productos lácteos y quesos para la producción de aromas y texturas. Leuconostoc causa ocasionalmente infecciones en humanos, puede producir bacteriemia, infección asociada a catéter, síndrome séptico, meningitis, neumonía, infección del tracto urinario, osteomielitis y compromiso hepático, entre otros. Se describen como factores de riesgo para una infección por este agente: el síndrome de intestino corto, uso de catéter venoso central y la alimentación enteral por gastrostomía. Orientan a la presencia de este agente el aislamiento de una cocácea grampositiva, catalasa negativa, PYR y LAP negativas, resistente a vancomicina. El tratamiento de elección es penicilina o ampicilina.

Bacteriemia por Leuconostoc spp en una paciente con síndrome de obstrucción intestinal / Bacteremia by Leuconostoc spp in a patient with Bowel Obstruction

Las especies de Leuconostoc spp. son patógenos oportunistas muy poco frecuentes, pero aislados en pacientes inmunosuprimidos,con infecciones intrahospitalarias generalmente asociadas con bacteriemia por catéter vascular central. Sereporta un caso de infección diseminada por Leuconostoc spp. en una paciente adulta con adenocarcinoma de recto y conlos factores de riesgo presentes, como: tiempo de hospitalización, múltiples intervenciones del tracto gastrointestinal, usode vancomicina, presencia de un catéter vascular central y nutrición parenteral prolongada.

The species of Leuconostoc spp. they are opportunists pathogenic little frequent, but isolated in inmunocompromised patients, with nosocomial infections, associated generally to bacteriemia by central vascular catheter. A case of disemined infection by Leuconostoc spp. is reported in an adult patient with a (Jenocarcinoma of rectum and the present factors of risk like: the time of hospitalization, the multiple interventions of tracto gastrointestinal, the use of vancomicin, the presence of a central vascular catheter and the prolonged parenteral nutrition.