If You're Not Confused, You're Not Paying Attention: Ochrobactrum Is Not Brucella.

Bacteria of the genus Brucella are facultative intracellular parasites that cause brucellosis, a severe animal and human disease. Recently, a group of taxonomists merged the brucellae with the primarily free-living, phylogenetically related Ochrobactrum spp. in the genus Brucella. This change, founded only on global genomic analysis and the fortuitous isolation of some opportunistic Ochrobactrum spp. from medically compromised patients, has been automatically included in culture collections and databases. We argue that clinical and environmental microbiologists should not accept this nomenclature, and we advise against its use because (i) it was presented without in-depth phylogenetic analyses and did not consider alternative taxonomic solutions; (ii) it was launched without the input of experts in brucellosis or Ochrobactrum; (iii) it applies a non-consensus genus concept that disregards taxonomically relevant differences in structure, physiology, population structure, core-pangenome assemblies, genome structure, genomic traits, clinical features, treatment, prevention, diagnosis, genus description rules, and, above all, pathogenicity; and (iv) placing these two bacterial groups in the same genus creates risks for veterinarians, medical doctors, clinical laboratories, health authorities, and legislators who deal with brucellosis, a disease that is particularly relevant in low- and middle-income countries. Based on all this information, we urge microbiologists, bacterial collections, genomic databases, journals, and public health boards to keep the Brucella and Ochrobactrum genera separate to avoid further bewilderment and harm.

Consenso Argentino de toxoplasmosis congénita 2020 / Argentine Consensus of congenital toxoplasmosis

Resumen La transmisión vertical de la infección por Toxoplasma gondii ocurre cuando la madre se infecta por primera vez en el transcurso del embarazo. El diagnóstico de la infección materna y la del re cién nacido se logra con el conjunto de pruebas serológicas, hallazgos clínicos y ecográficos. El reconocimiento temprano de la infección materna permite un tratamiento que reduce la tasa de transmisión y el riesgo de daño en el producto de la concepción. El objetivo de este consenso de expertos fue revisar la literatura científica para actualizar las recomendaciones de práctica clínica respecto de la prevención, el diagnóstico y el tratamiento de la toxoplasmosis congénita en nuestro país.

Abstract Mother-to-child transmission in Toxoplasma gondii infection occurs only when the infection is acquired for the first time during pregnancy. Diag nosis of maternal infection and the newborn is achieved by a combination of serological tests, clinical features and ultrasound images. An early diagnosis of maternal infection allows treatment that offers a reduction both in transmission rate and risk of congenital damage. The aim of this expert consensus was to review the scientific literature which would enable an update of the clinical practice guideline of prevention, diagnosis and treatment of congenital toxoplasmosis in our country.

[Argentine consensus of congenital toxoplasmosis]. / Consenso argentino de toxoplasmosis congénita 2020.

Mother-to-child transmission in Toxoplasma gondii infection occurs only when the infection is acquired for the first time during pregnancy. Diagnosis of maternal infection and the newborn is achieved by a combination of serological tests, clinical features and ultrasound images. An early diagnosis of maternal infection allows treatment that offers a reduction both in transmission rate and risk of congenital damage. The aim of this expert consensus was to review the scientific literature which would enable an update of the clinical practice guideline of prevention, diagnosis and treatment of congenital toxoplasmosis in our country.

La transmisión vertical de la infección por Toxoplasma gondii ocurre cuando la madre se infecta por primera vez en el transcurso del embarazo. El diagnóstico de la infección materna y la del recién nacido se logra con el conjunto de pruebas serológicas, hallazgos clínicos y ecográficos. El reconocimiento temprano de la infección materna permite un tratamiento que reduce la tasa de transmisión y el riesgo de daño en el producto de la concepción. El objetivo de este consenso de expertos fue revisar la literatura científica para actualizar las recomendaciones de práctica clínica respecto de la prevención, el diagnóstico y el tratamiento de la toxoplasmosis congénita en nuestro país.

Endogenous Histoplasma capsulatum endophthalmitis in an immunocompetent patient.

PURPOSE: To report on a case of Histoplasma capsulatum endogenous endophthalmitis in an immunocompetent patient. METHODS: A 30-year-old patient was admitted with floaters and vision impairment of 1 month's duration. He had a history of adrenal insufficiency, together with nasal, septum, and soft palate lesions of 3 months; duration. Culture results from specimens of these lesions were positive for H capsulatum. He was human immunodeficiency virus negative and there was no evidence of immunodepression or history of immunosuppression. Fundus examination revealed multiple fluffy balls with a string of pearls appearance, 2+ vitreous haze, multiple foci of retinochoroiditis inferiorly in the peripheral retina, and a 6-disk area lesion of retinochoroiditis at the superotemporal periphery. Due to poor response to oral itraconazole, a vitrectomy was performed with an intraocular injection of amphotericin B 5 µg/0.1 mL and removal for a vitreous specimen for culture of bacteria and fungi. RESULTS: Vitreous specimen culture of the yeast at 28°C grew a white filamentous fungus colony, which was again cultured in a brain heart infusion agar medium, where it developed hyaline septate hyphae with microconidia and circular macroconidia with double wall, which was stained with a lactophenol dye at microscopic examination. The macroscopic morphology was consistent with H capsulatum. CONCLUSIONS: Although endogenous H capsulatum endophthalmitis is a rare entity, it should be considered as a possible etiology even in apparently immunocompetent hosts, especially in patients with history of disseminated disease.

Prevalencia de gérmenes multirresistentes en infecciones del tracto urinario de la comunidad y asociadas a los cuidados de la salud / Prevalence of multidrug resistant pathogens from community and health care associated urinary tract infections

Las infecciones asociadas a los cuidados de la salud (ACS) han sido identificadas como un factor de riesgo de patógenosd resistenes, sin embargo existen escasos datos de ésta categoría epidemiológica en infecciones del tracto urinario (ITU). Métodos: estudio prospectivo y observacional de pacientes ‗> 18 años procedentes de la comunidad con ITU atendidos en un Hospital General de Agudos (Diciembre 2011-Noviembre 2012). Fueron considerados como ITU-aCS aquellos pacientes con hospitalización en los 90 días previos, residencia en geriátricos/centros de rehabilitación, hemodiálisis crónica, infusión de drogas endovenosas/curación de heridas en su domiciliio, o uso crónico de catéter urinario. Aquellos pacientes que no presentaban ninguno de estos criterios fueron considerados como ITU de la comunidad (CO). Resultados: se incluyeron un total de 87 pacientes, de los cuales 42 (48%) y 45 (52%) se consideraron como ITU-CO e ITU-ACS, respectivamente. Los patógenos más frecuentes fueron: E. coli (74% vs 47 %), K pneumoniae (12 % vs 20 %), y E. faecalis (5 % vs 7 %) para ITU-CO e ITU-ACS respectivamente. Se observó una frecuencia de patógenos multirresistentes de 10 % y 49 % (p<001) para la ITU-CO vs ITU-ACS respectivamente. Conclusiones: nuestro estudio sugiere que las ITU-ACS representarían una categoría de ITU epidemiológica y microbiológicamente distinta que ITU-CO. Se deberían identificar correctamente a estos pacientes con el fin de proporcionar un tratamiento empírico adecuado...

Health care-associated infections (HCA) are a risk factor for multidrug resistant pathogens. However, limited data of this epidemiological category for urinary tract infections (UTI) is available. Methods: This was a prospective and observational study of adult patients coming from community who were attended as outpatients or hospitalizaed for urinary tract infections at a general Hospital (December 2011-November 2012). Patients who had drug infusions or wound care at home, prior hospitalization >=2 days in the preceding 90 days and chronic indwelling urinary catheters were considered to have HCA-UTI. Results: A total of 87 patients ere included, of whom 42 (48%) and 45 (52%) were considered to have ommunity acquired UTI (CA-UTI) and HCA-UTI rspectivelvy. The most frequent pathogens were: E. coli (74% vs. 47%), K pneumoniae (12% vs. 20%), and E. faecalis (5% vs. 7%) for CA-UTI and HCA-UTI respectively. Prevalence of MDR: 10% and 49% (p<0.01) for CA-UTI and HCA-UTI respectively. Conclusions: Our study suggests that HCA-UTI should represent a category of UTI epidemiologically and microbiologically distinct from CA-UTI. Physicians should correctly identify these patients in orden to provide optimal clinal management...

Prevalencia de gérmenes multirresistentes en infecciones del tracto urinario de la comunidad y asociadas a los cuidados de la salud / Prevalence of multidrug resistant pathogens from community and health care associated urinary tract infections

Introducción: las infecciones asociadas a los cuidados de la salud (ACS) han sido identificadas como un factor de riesgo de pa-tógenos resistentes, sin embargo existen escasos datos de ésta cate-goría epidemiológica en infecciones del tracto urinario (ITU). Métodos: estudio prospectivo y observacional de pacientes ≥ 18 años procedentes de la comunidad con ITU atendidos en un Hospital Ge-neral de Agudos (Diciembre 2011-Noviembre 2012). Fueron conside-rados como ITU-ACS aquellos pacientes con hospitalización en los 90 días previos, residencia en geriátricos/centros de rehabilitación, hemodiálisis crónica, infusión de drogas endovenosas/curación de heridas en su domicilio, o uso crónico de catéter urinario. Aquellos pacientes que no presentaban ninguno de estos criterios fueron con-siderados como ITU de la comunidad (CO).Resultados: se incluyeron un total de 87 pacientes, de los cuales 42 (48 %) y 45 (52 %) se consideraron como ITU-CO e ITU-ACS, respectivamente. Los patógenos más frecuentes fueron: E. coli (74 % vs 47 %), K pneumo-niae (12 % vs 20 %), y E. faecalis (5 % vs 7 %) para ITU-CO e ITU-ACS res-pectivamente. Se observó una frecuencia de patógenos multirresisten-tes de 10 % y 49 % (p < 0,01) para la ITU-CO vs. ITU-ACS respectivamente.Conclusiones: nuestro estudio sugiere que las ITU-ACS representarían una categoría de ITU epi-demiológica y microbiológicamente distinta que ITU-CO. Se deberían identificar correctamente a estos pacientes con el fin de proporcionar un tra-tamiento empírico adecuado

ntroduction: Health care­associated infections (HCA) are a risk factor for multidrug resistant pathogens. However, limited data of this epidemiological category for urinary tract infections (UTI) is available. Methods: This was a prospective and observational study of adult patients coming from community who were attended as outpatients or hospitalized for urinary tract infections at a general Hospital (December 2011-November 2012). Patients who had residency at nursing homes, chronic haemodialysis, intravenous drug infusions or wound care at home, prior hospitalization >= 2 days in the preceding 90 days and chronic indwelling urinary catheters were considered to have HCA-UTI. Results: A total of 87 patients were included, of whom 42 (48%) and 45 (52%) were considered to have community acquired UTI (CA-UTI) and HCA-UTI respectively. The most frequent pathogens were: E. coli (74% vs. 47%), K pneumoniae (12% vs. 20%), and E. faecalis (5% vs. 7%) for CA-UTI and HCA-UTI respectively. Prevalence of MDR: 10% and 49% (p<0.01) for CA-UTI and HCA-UTI respectively. Conclusions: Our study suggests that HCA-UTI should represent a category of UTI epidemiologically and microbiologically distinct from CA-UTI. Physicians should correctly identify these patients in order to provide optimal clinical management

Human brucellosis at a pig slaughterhouse.

Seventeen workers in a pig slaughterhouse with signs and symptoms compatible with brucellosis were clinically examined at the outpatient service of different health institutions and studied by serological tests during the period 2005-2011. Eleven blood cultures were taken and six Brucella suis strains were isolated, three biovar 1 and three with atypical characteristics. In order to confirm that these cases had no common source, a variable number of tandem repeat (VNTR) analyses were performed on 5 of the 6 strains whose results showed substantial heterogeneity in the genotypes, thereby demonstrating that the immediate origin was not the same. Two hundred adult pigs admitted for slaughter at the plant were sampled by convenience and tested by buffered antigen plate test (BPAT), serum agglutination test (SAT) and 2-mercapto-ethanol test (MET). Seven of 62 males (11%) and 25/138 (18%) females tested positive. The study results contribute information on risk scenarios for packing plant workers and underscore the need to improve plant workers' education on appropriate containment measures and to actively screen animals for swine brucellosis.

Application of variable number of tandem repeats typing to describe familial outbreaks of brucellosis in Argentina.

Consumption of inadequately pasteurized dairy products is the most common means of transmission of brucellosis. This report describes two foodborne outbreaks that occurred in families infected after consumption of fresh home-made cheese bought in different Argentine provinces. High resolution variable number of tandem repeats (VNTR)-based analysis revealed two well-defined groups comprising essentially identical profiles and corresponding to the two different outbreaks. Similar clinical findings in members of the same family could indicate that the differential virulence of different bacterial clones, as indicated by VNTR data, could have influenced the course of the disease. We observed the importance of adequate treatment in early stages of the disease; combination therapy and extended treatment for 6 weeks or longer yielded significantly better results. The risk of the foodborne transmission of this zoonotic disease and disease prevention should be considered.

Brucella canis causing infection in an HIV-infected patient.

From the blood culture of an HIV-positive patient with a febrile syndrome (CD4 count 385 cells/microL and viral load nondetectable), Brucella canis was isolated. The patient was presumptively infected from his dogs, which tested positive, and showed good outcome after the therapy with doxycycline-ciprofloxacin, and the HIV infection would seem not to have been influenced by brucellosis. To our knowledge, no other case of B. canis in the setting of HIV infection has been reported in the literature, and the emerging zoonotic potential of the disease in urban areas should be considered.

Brucellosis complicating chronic non-infectious disorders: diagnostic and therapeutic dilemmas.

There is little information in the literature on the clinical progress of brucellosis in patients affected by other non-infectious diseases; however, the infection can often trigger an exacerbation of existing underlying conditions in certain target organs. In this report we present four cases of brucellosis complicating previous diseases, and the difficulties in relation to their diagnosis and treatment. The study involved four patients with the following disorders: polycythaemia vera, pulmonary fibrosis, cirrhosis of the liver and arthritis of the knee. Brucellosis was diagnosed by classical serological and bacteriological methods. The strains involved could be isolated only in three of the four patients: two strains were Brucella abortus biovar 1 and one was Brucella suis biovar 1. Two patients relapsed 10 and 7 months after admission, another presented chronic brucellosis and received various therapy schemes, and one died. Since the best selection of antibiotics and the optimal duration of therapy remain unknown for patients having brucellosis complicated by previous pathologies, these remain at the discretion of the attending physician. Management of our patients was controversial in terms of the selection of antibiotics, duration of treatment and decision regarding surgery.

Infección cutánea por Mycobacterium chelonae asociada a lipoaspiración / Cutaneous infection with Mycobacterium chelonae associated with liposuction

La infección de micobacterias atípicas de rápido crecimiento ha sido asociada a diversos procedimientos invasivos como mamoplastia, acupuntura, microcirugía de Mohs y lipoaspiración. Reportamos el caso de una paciente que presentó una infección por Mycobacterium chelonae, un mes después de haber sido sometida a una lipoaspiración en muslos. Fue tratada con claritromicina durante seis meses con remisión completa de las lesiones y sin evidencia de recidiva luego de trece meses de seguimiento.

Diagnosis of human brucellosis caused by Brucella canis.

The transmission of Brucella canis to man commonly occurs through contact with infected dogs or their secretions, or through direct laboratory exposure. The disease is underdiagnosed due to a general lack of serological testing facilities and misconceptions concerning its prevalence. This report shows the potential use of an indirect ELISA (IELISA) for the diagnosis of human brucellosis caused by B. canis in a population of patients negative by smooth-Brucella antigen tests but positive by rapid slide agglutination test (RSAT). One hundred and ten sera from asymptomatic people found negative by tests using smooth Brucella abortus antigen and by RSAT showed an IELISA specificity of 100 % when a cut-off value of 27 % positivity (%P) was selected. For 17 sera from patients with positive B. canis culture or in close contact with culture-positive dogs, the IELISA sensitivity was 100 % with the same cut-off value. The positive patients presented clinical symptoms similar to brucellosis caused by other species of Brucella and some of them received antibiotic treatment and made good progress. Using this cut-off value, we studied 35 patients with negative blood cultures but positive RSATs, and IELISA detected 18 as positive; of the 17 IELISA-negative, two were RSAT-positive at dilution 1 : 2 and 15 were weakly positive with pure serum. These samples were probably from patients at an early stage of infection or indicate false-positive results. No cross-reaction was observed among the sera from nine cases with a diagnosis other than brucellosis, but cross-reactivity was evident in sera from patients infected with smooth-Brucella species. Since routine brucellosis diagnosis does not include B. canis investigation, infection with this species may be more widespread than is currently suspected. The RSAT could be a suitable screening test for the diagnosis of B. canis human brucellosis, and a supplementary technique, such as IELISA, performed on all positive RSAT samples that were negative by B. abortus antigen could ensure diagnostic specificity and confirm the diagnosis.

Unusual clinical presentation of brucellosis caused by Brucella canis.

Brucella canis is considered a rare cause of human brucellosis. The clinical importance of this infection may have been underestimated so far because of difficulties with presumptive diagnosis. The case described here presented symptoms compatible with brucellosis but the routine tests using Brucella abortus antigen were negative. The infection would have remained undiagnosed if culture had not been positive. This case illustrates the potential for a favourable outcome in Brucella canis diagnosis and supports recommendations for the use of B. canis serology. The infection should be suspected in patients with compatible symptoms and negative serology for B. abortus antigen.

Enfermedad mano-pie-boca: a propósito de un caso por enterovirus 71 / Hand-foot-mouth disease associated with enterovirus 71

Una niña de 10 meses fue derivada a la consulta dermatológica por exantema y enantema de 48 horas de evolución. Las vesículas de forma redondeada u ovalada asentaban sobre piel discretamente eritematosa y se extendían a muslos, manos, pies y boca tanto en labios como en lengua. El diagnóstico clínico e histopatológico de las lesiones resultó compatible con enfermedad mano-pie-boca y el diagnóstico virológico realizado en cultivo celular permitió identificar al agente etiológico como enterovirus 71 (EV71). Esta etiología ha sido asociada en epidermis de enfermedad mano-pie-boca con elevado compromiso neurológico. Nuestra paciente cursó sin complicaciones