Viruela símica: zoonosis emergente con impacto global / Monkeypox: emerging zoonosis with unprecedentedglobal impact

El virus de la viruela símica es un orthopoxvirus de características zoonóticas endémico en las regiones de África Central y África Occidental, donde causa brotes desde 1970. En las últimas décadas se registró un aumento exponencial de casos, probablemente asociado a la disminución en la inmunidad conferida por la vacuna antivariólica, discontinuada luego de la erradicación de la viruela. En los últimos años se registraron casos esporádicos fuera del continente africano, siempre relacionados epidemiológicamente a la permanencia en áreas endémicas o contacto con animales infectados. Desde el 13 de mayo de 2022 se encuentra en curso el mayor brote de viruela símica registrado fuera de las áreas endémicas de África, con casos en los cinco continentes. La extensión, el impacto y la duración del brote permanecen aún inciertos.

Monkeypox virus is an orthopoxvirus with zoonotic characteristics endemic in Central and West Africa regions, where it has caused outbreaks since 1970. An exponential increase in cases has been registered in the last decades, probably associated with a decrease in the immunity conferred by the smallpox vaccine, discontinued after smallpox eradication. In recent years, sporadic cases have been reported outside the African continent, always epidemiologically related to permanence in endemic areas or contact with infected animals. Since May 13, 2022, the largest monkeypox outbreak ever reported outside Africa endemic areas, with cases on the five continents, is unfolding. The extent, impact and duration of this outbreak still remain uncertain

Reporte de seis casos de úlceras genitales durante la inducción en leucemia aguda promielocítica con ácido all-transretinoico y revisión bibliográfic / Report of six cases of Genital Ulcers during induction therapy of Acute Promyelocytic Leukemia with ATRA and review of literature

El ácido all-transretinoico (ATRA) es uno de los mayores avan-ces en el tratamiento de las leucemias promielocíticas agudas (LPA). Con el uso asociado de quimioterapia y corticoides hacen de ésta leu-cemia las de mejor pronóstico hematológico con altas tasas de cu-ración. El ATRA es generalmente bien tolerado pero puede presen-tar efectos adversos sistémicos, englobados dentro del denominado sindrome ATRA (SATRA), o efectos directos gastrointestinales y mu-cocutáneos tales como las úlceras escrotales, transitorias y de buena respuesta clínica, tratándose de una entidad diferente al SATRA con presencia de vasculitis en el estudio anatomopatológico. En la revisión que realizáramos, hemos detectado 44 casos reportados en la literatu-ra a los que hemos agregado, en el siguiente documento, seis pacientes evaluados en nuestra institución con úlceras genitales asociadas al uso de ATRA, cuatro de ellos con presencia de vasculitis como lesión histo-lógica y un paciente con diagnóstico de síndrome Sweet

All-trans retinoic acid (ATRA) is one of the greatest advances in the treatment of Acute Promyelocytic Leukemia. The combination of all-trans-retinoic acid (ATRA), chemotherapy and corticoids has made acute promyelocytic leukemia (APL) a highly curable leukemia. The ATRA is generally well tolerated. Adverse effects, include ATRA syndrome (SATRA), and the gastrointestinal and mucocutaneous side effects, such us scrotal ulcers, wich are transitory and with a good clinical response. They are a different entity to SATRA, and presents vasculitis in the histological study. Of our knowledge, 44 cases were reported in the literature, we present the following document with six patients evaluated at our institution with genital ulcers associated with ATRA, four of them present vasculitis in pathological study, and one patient Sweet ́s Syndrome

Bacteriemias por bacilos Gram negativos multirresistentes en neutropénicos febriles con enfermedades hematológicas / Bacteremia due to multiresistant Gram-negative bacilli in febrile neutropenic patients with hematological diseases

Las infecciones por bacilos Gram negativos multiresistentes (BGN-MR) son frecuentes en nuestro hospital. Presentan limitadas opciones terapéuticas e importante impacto en la morbimortalidad y costos. Objetivo: analizar los factoes de riesgo y evolución de las bacteriemias por BGN-MR en pacientes neutropénicos febriles con patologías hematológicas. Materiales y métodos: estudio prospectivo, descriptivo y observacional de los factores de riesgo para BGN-MR en la población descripta. Se realizó análisis univariado y multivariado de variables clínicas, epidemiológicas, microbiológicas y evolutivas. Resultados: El 27 % de los episodios de neutropenia y fiebre cursaron con bacteriemias por BGN, 42 % de ellos fueron producidos por BGN-MR. En el análisis univariado, dichas bacteriemias se asociaron al uso previo de antibióticos; a las bacteriemias de brecha y neutropenias mayores a 7 días. En el análisis multivariado la bacteriemia de brecha mantuvo su significancia estadística (P<0,001; OR: 5,17; IC 95 % 2,1-12,7). Acinetobacter spp fue el BGN-MR más frecuentemente aislado incluso en los pacientes fallecidos. No se detectó el foco en el 45,9 % de los episodios. Los tratamientos inadecuados fueron significativamente más frecuentes en los pacientes con BGN-MR y la mortalidad tanto global como atribuible también se asoció significativamente al tratamiento inadecuado de las bacteriemias por BGN-MR (P<0,04;RR: 2,46;IC 95 % 1,03-5,9 y P< 0,014; RR: 3,02; IC 95 % 1,22-0,45 respectivamente). Conclusiones: Las bacteriemias por BGN-MR son frecuentes en la población estudiada en especial los que han recibido ATB previo y en las que surgen intratratamiento ATB. Recibieron con mayor frecuencia tratamiento empírico inadecuado, lo que se asoció a mayor mortalidad...

Bacterial infections by multiresistant Gram-negative bacilli (BGN-MR) are an increasing problem in our hospital with a major impact on morbidity, mortality and costs. Objective: to analize risk factors and outcome in bacteremia due to multiresistant Gram-negative bacilli in febrile neutropenic patients with hematologic diseases. Material and Methods: We conducted a prospective, descriptive and observational study to describe the risk factors and outcome of BGN-MR bacteremia in these patients. Results: Twenty seven percent of neutropenia and fever episodes had Gram-negative bacilli bacteremia and 42 % of them were caused by BGN-MR. Previous use of antibioteics, breakthrough bacteremia and prolonged neutropenia (<7 days) were significant in univariate analysis. In multivariate analysis only breakthrough bacteremia was significant (P< 0.001; OR 5,17;IC 95 % 2.1-12.7). Acinetobactersppp was the most common BGN-MR isolated in blood-stream infections and in patients who died. The source of infections was unknown in 45,9 % of the episodes. Inadequate empirical therapy was most common in BGN-MR bacteremia and it was associated with increased overall and attributable mortality (P<0.04; RR: 2.46; IC 95 % 1.03-5.9 y P<0.014; RR: 3.02; IC 95 % 1.22-7.45). Conclusions: BGN-MR was frequent in neutropenic patients with hematological diseases specially in those exposed to antibiotics and in breakthroug bacteremia. Inappropiate antimicrobial therapy was common and is associated with adverse outcome...

[First Travel Medicine Center in a public hospital from Buenos Aires Province, Argentina Republic: The first 2 years of experience]. / Primer Centro de Medicina del Viajero en un hospital público de la Provincia de Buenos Aires, República Argentina: Dos años de experiencia.

INTRODUCTION: Although Buenos Aires is the biggest province in Argentina, there was no program for Travel Medicine in any public hospital until 2008, when the Travel Medicine Center (CEMEVI) was established in our hospital. OBJECTIVE: To analyze the first 24 months of experience in the CEMEVI. RESULTS: A total of 278 travelers were assisted. Most of them consulted before traveling (pre-travel visits). The most common destinations were countries in South America and urban as well as rural areas. Travelling to malaria and yellow fever endemic countries represented 35% and 16% of the total of destinations, respectively. Only 4% were post-travel interviews. CONCLUSION: It is feasible and fruitful to implement a Travel Medicine Center in the public health system.

Primer Centro de Medicina del Viajero en un hospital público de la Provincia de Buenos Aires, República Argentina: Dos años de experiencia / First Travel Medicine Center in a public hospital from Buenos Aires Province, Argentina Republic: The first 2 years of experience

Introduction: Although Buenos Aires is the biggest province in Argentina, there was no program for Travel Medicine in any public hospital until 2008, when the Travel Medicine Center (CEMEVI) was established in our hospital. Objective: To analyze the first 24 months of experience in the CEMEVI. Results: A total of 278 travelers were assisted. Most of them consulted before traveling (pre-travel visits). The most common destinations were countries in South America and urban as well as rural areas. Travelling to malaria and yellow fever endemic countries represented 35% and 16% of the total of destinations, respectively. Only 4% were post-travel interviews. Conclusion: It is feasible and frutful to implement a Travel Medicine Center in the public health system.

Introducción: La Provincia de Buenos Aires, a pesar de ser la mayor de nuestro país, no contaba con ningún sitio de asesoramiento al viajero instalado en un hospital público, hasta que en el año 2008 se crea el Centro de Medicina del Viajero (CEMEVI) en nuestro hospital. Objetivo: analizar de manera retrospectiva los primeros 24 meses de experiencia en el CEMEVI. Resultados: Recibimos un total de 278 consultas, la mayoría durante el pre-viaje, a países de América del Sur, a sitios urbanos- rurales, de los cuales 35 y 16% de los viajeros visitaron zonas de riesgo para malaria y fiebre amarilla, respectivamente. Sólo 4% de las consultas fueron en el post-viaje. Conclusión: Es posible y fructífero implementar un Centro de Medicina del Viajero en el sector público de salud.

[Nosocomial bloodstream infections caused by gram-negative bacilli: epidemiology and risk factors for mortality]. / Epidemiología y factores de riesgo de mortalidad de las bacteriemias intrahospitalarias por bacilos gramnegativos.

Nosocomial bacteremia is a major cause of hospital infection, associated with high rate of morbidity and mortality, prolonged hospital stay and higher costs. However, few prospective studies analyse the prognostic factors associated with mortality of gramnegative rods bloodstream infections in hospital wards outside of intensive care units. A prospective/descriptive study was conducted from March to December 2006. All patients with nosocomial-acquired bloodstream infection due to gramnegative rods were included. Epidemiology and clinical features were analysed as potential prognostic factors for mortality. During the study period, 84 cases were detected, being A. baumannii, Burkholderia sp and E. coli the most frequent isolates, with a mortality of 48%>. Bacteremia derived from a high-mortality associated septic focus (RR 4.9, IC95%> 1.3 - 18.8) and admission to intensive care unit (RR 4.78, IC95%> 1.7- 13.1) were independent variables associated with mortality. Inappropriate empirical antibiotic treatment was not associated with greater risk of mortality. Nosocomial gramnegative bloodstream infections in our series were mainly due to non-fermentative bacilli and were associated with high mortality rates when their origin was a high risk septic focus or the patient was admitted to intensive care unit.

Epidemiología y factores de riesgo de mortalidad de las bacteriemias intrahospitalarias por bacilos gramnegativos / Nosocomial bloodstream infections caused by gram-negative bacilli: epidemiology and risk factors for mortality

Nosocomial bacteremia is a major cause of hospital infection, associated with high rate of morbidity and mortality, prolonged hospital stay and higher costs. However, few prospective studies analyse the prognostic factors associated with mortality of gramnegative rods bloodstream infections in hospital wards outside of intensive care units. A prospective/descriptive study was conducted from March to December 2006. All patients with nosocomial-acquired bloodstream infection due to gramnegative rods were included. Epidemiology and clinical features were analysed as potential prognostic factors for mortality. During the study period, 84 cases were detected, being A. baumannii, Burkholderia sp and E. coli the most frequent isolates, with a mortality of 48 percent>. Bacteremia derived from a high-mortality associated septic focus (RR 4.9, IC95 percent> 1.3 - 18.8) and admissionto intensive care unit (RR 4.78, IC95 percent> 1.7- 13.1) were independent variables associated with mortality. Inappropriate empirical antibiotic treatment was not associated with greater risk of mortality. Nosocomial gramnegative bloodstream infections in our series were mainly due to non-fermentative bacilli and were associated with high mortality rates when their origin was a high risk septic focus or the patient was admitted to intensive care unit.

La bacteriemia nosocomial es una causa importante de infección intrahospitalaria, asociada a alta morbi-mortalidad, pero pocos estudios examinan en forma prospectiva las bacteriemias por bacilos grammne-gativos (BGN) más allá de las áreas de cuidados intensivos. Se realizó un estudio descriptivo, prospectivo desde marzo a diciembre del 2006, reclutando todos los pacientes con bacteriemia por BGN de origen intra-hospitalario. Se analiza la epidemiología y características clínicas como potenciales factores pronósticos de mortalidad. En el período de estudio se detectaron 84 casos (los más frecuentes A. baumannii, Burkholderia sp. y E. coli), con una mortalidad de 48 por ciento. La bacteriemia derivada de un foco infecciosos asociada a alta mortalidad (RR 4.9, IC95 por ciento 1,3-18,8) y la internación en UCI (RR 4,78, IC95 por ciento 1,7-13,1) fueron variables independientes predictoras de mortalidad. El tratamiento antimicrobiano empírico inadecuado no se asoció a mayor mortalidad. La bacteriemia nosocomial por BGN en nuestra serie se debió principalmente a bacilos no fermentadores y ésta se asoció con alta mortalidad cuando el origen fue un foco de alto riesgo o el paciente se encontraba internado en la UCI.