Neuquén, Argentina
Neuquén, Argentina

Time filter

Source Type

Kottwitz L.B.M.,State University Londrina | De Oliveira T.C.R.M.,State University Londrina | Alcocer I.,Pontifical Catholic University of Ecuador | Farah S.M.D.S.S.,Laboratorio Central | And 2 more authors.
Acta Scientiarum - Health Sciences | Year: 2010

Epidemiological data of foodborne diseases in Brazil are scarce. In Paraná State, there is little information on the prevalence of Salmonella serovars and fagotypes involved in outbreaks. The aim of this study was to evaluate epidemiological data of salmonellosis outbreaks notified in Paraná State between January 1999 and December 2008. During the study period, 286 Salmonella outbreaks occurred and a total of 5,641 people were exposed, 2,027 (35.9%) became ill, and 881 (16.3%) were hospitalized. Fifty-two cities (13.0%) in Paraná notified Salmonella outbreaks. Eggs and egg products, meat and meat products and other foods were, respectively, associated with 45.0, 34.8 and 20.2% of the notified outbreaks. Serovar Enteritidis was prevalent and identified in 87.8% of the strains isolated from patients and in 80.6% of the strains isolated from food involved in outbreaks. Salmonella Enteritidis PT4 was the prevalent phagotype. However, a prevalence of PT9 occurred after 2003. Of the total number of outbreaks analyzed, 49.7% occurred in residences. This result indicates that educational actions of the State Food Safety and Inspection Service should be for both commercial and domestic food handlers.


Da Conceicao-Machado M.E.P.,Federal University of Bahia | Silva L.R.,FAMED | Silva L.R.,Complexo Hospitalar Universitario Professor Edgard Santos | Santana M.L.P.,ENUFBA | And 6 more authors.
Jornal de Pediatria | Year: 2013

Objective: This study aimed to identify the prevalence of hypertriglyceridemic waist (HTW) phenotype, and to evaluate its association with metabolic abnormalities in adolescents of low socioeconomic status. Method: This was a cross-sectional study with a random sample of 1,076 adolescents between 11 and 17 years, of both genders, from public schools. The participants underwent anthropometric measurements (weight, height, and waist circumference), and levels of total cholesterol, low-density-lipoprotein cholesterol (LDL-C), high-density-lipoprotein cholesterol (HDL-C), non-HDL cholesterol, triglyceride (TG), and fasting glucose were measured. Information regarding the socioeconomic status of the participants' families was obtained. The HTW phenotype was defined by the simultaneous presence of increased waist circumference (≥ 90th percentile for age and gender) and serum triglyceride levels (≥ 100 mg/dL). A logistic regression analysis was used to evaluate the associations of interest. Results: The prevalence of HTW phenotype was 7.2% among the adolescents, being higher in the presence of obesity (63.4%) and high levels of non-HDL cholesterol (16.6%) and LDL-C (13.7%). The bivariate analysis indicated that, of the metabolic variables, only blood glucose was not associated with the HTW phenotype. Multivariate analysis adjusted for age and gender indicated that the HTW phenotype was positively associated with high non-HDL cholesterol (odds ratio: 7.0; 95% CI: 3.9-12.6) and low HDL-C levels (odds ratio: 2.7; 95% CI: 1.5-4.8). Conclusions: This study demonstrated that the HTW phenotype was associated with an atherogenic lipid profile, and this phenotype is suggested as a screening tool to identify adolescents with metabolic alterations. Copyright © 2013 Sociedade Brasileira de Pediatria. Published by Elsevier Editora Ltda. All rights reserved.


PubMed | Servicio de Cardiologia, Laboratorio central and Servicio de Nefrologia
Type: Journal Article | Journal: Revista de la Facultad de Ciencias Medicas (Cordoba, Argentina) | Year: 2016

The end stage renal disease confers a high morbidity and mortality risk, mainly due to cardiovascular disease. The cardiac T troponin and carbohydrate antigen-125 (CA-125) are useful biomarkers to determine cardiovascular prognosis in order to start preventive treatment in the high risk patients.We included patients with end stage renal disease in hemodialysis treatment. Plasma high sensitivity cardiac T troponin (hs-TNT) and CA-125 were measured at the beginning of follow up. The patients with clinical evidence of an acute myocardial infarction were excluded. Twelve month after the measurement of the biomarkers the patients were called to assess the occurrence of major adverse cardiovascular events (MACE) and hospitalizations for any reason.Eighty seven patients were included. The mean age was 5815 years, and 76% were male. The hs-TNT was elevated in 95.4% of the patients and the median value was 49 ng/l (15.3 - 214.1). CA-125 median value was 13.7 U/ml (6.1 - 52.7). The patients that presented a MACE had higher CA-125 (p< 0.03) and hs-TNT (p <0.001); and all of them had a troponin value 69.37 ng/l.The prevalence of high hs-TNT was 95.4% and of CA-125 10%. MACE were significantly higher in patients with elevated biomarkers, conferring them prognostic utility in this group of patients.


PubMed | Pará State University, Instituto Evandro Chagas, University of Texas Medical Branch, Federal University of Maranhão and 2 more.
Type: | Journal: Journal of clinical virology : the official publication of the Pan American Society for Clinical Virology | Year: 2016

Zika virus (ZIKV) was first detected in Brazil in May 2015 and the country experienced an explosive epidemic. However, recent studies indicate that the introduction of ZIKV occurred in late 2013. Cases of microcephaly and deaths associated with ZIKV infection were identified in Brazil in November, 2015.To determine the etiology of three fatal adult cases.Here we report three fatal adult cases of ZIKV disease. ZIKV infection in these patients was confirmed by cells culture and/or real-time reverse transcriptase polymerase chain reaction (RT-qPCR) and by antigen detection using immunohistochemical assay. Samples of brain and other selected organs taken at autopsy from three patients were also analyzed by histopathological and immunohistological examination.The first patient, a 36-year-old man with lupus and receiving prednisone therapy, developed a fulminant ZIKV infection. At autopsy, RT-qPCR of blood and tissues was positive for ZIKV RNA, and the virus was cultured from an organ homogenate. The second patient, a previously healthy female, 16 years of age, presented classic symptoms of Zika fever, but later developed severe thrombocytopenia, anemia and hemorrhagic manifestations and died. A blood sample taken on the seventh day of her illness was positive RT-PCR for ZIKV RNA and research in the serum was positive for antinuclear factor fine speckled (1/640), suggesting Evans syndrome (hemolytic anemia an autoimmune disorder with immune thrombocytopenic purpura) secondary to ZIKV infection. The third patient was a 20-year-old woman hospitalized with fever, pneumonia and hemorrhages, who died on 13days after admission. Histopathological changes were observed in all viscera examined. ZIKV antigens were detected by immunohistochemistry in viscera specimens of patients 1 and 3. These three cases demonstrate other potential complications of ZIKV infection, in addition to microcephaly and Guillain-Barre syndrome (GBS), and they suggest that individuals with immune suppression and/or autoimmune disorders may be at higher risk of developing severe disease, if infected with ZIKV.


PubMed | National University of Comahue, Laboratorio Central and National University of La Plata
Type: | Journal: Veterinary parasitology | Year: 2016

Echinococcus granulosus sensu lato (E. granulosus sl) must be considered as a species complex, comprising Echinococcus granulosus sensu stricto (E. granulosus ss, genotypes G1-G3), Echinococcus equinus (G4), Echinococcus ortleppi (G5) and Echinococcus canadensis (G6-G10) although the species status of E. canadensis is still controversial. These genotypes closely match the intermediate hosts associated strains described in earlier times among which E. canadensis G6 corresponds to the camel strain. As there are no studies concerning the development of adult stages of the G6 genotype from non-camel origin, the aims of the present study were: to characterize for the first time the development of E. canadensis G6 in dogs experimentally infected with protoscoleces derived from goats, to describe the resultant adult morphology, to evaluate the growth of their rostellar hooks from larval to adult stages and to determine the prepatent period of the strobilar stage of E. canadensis G6 derived from goats. The development of the strobilar stage of E. canadensis G6 genotype of goat origin was examined by studying the growth (variation of the total worm length) and segmentation in experimentally infected dogs at 14, 25, 35 and 56days post infection. A morphological characterization of 35-day-old worms as well as of larval and adult rostellar hooks was also carried out by conventional optical microscopic observations and/or by scanning electron microscopy. The prepatent period of the strobilar stage was assessed by microscopic examination of faeces from 2 infected dogs. Our results were compared with published data from the camel and other strains. The roles of the host, genotype and species in morphological and developmental features as well as the taxonomic position of E. canadensis G6 were discussed. The prepatent period of E. canadensis G6 genotype of goat origin was determined as at least, 41days. The obtained results contribute to increase the knowledge about the biology and genetics of E. granulosus sl complex and are also of practical usefulness for the design of disease control strategies.


Pianciola L.,Laboratorio Central | D'Astek B.A.,Servicio Fisiopatogenia | Mazzeo M.,Laboratorio Central | Chinen I.,Servicio Fisiopatogenia | And 2 more authors.
International Journal of Medical Microbiology | Year: 2016

Shiga toxin-producing Escherichia coli (STEC) are important food-borne pathogens associated with human diseases. In Argentina, O157:H7 is the dominant serotype in hemolytic uremic syndrome (HUS) cases. Previously, we have described the almost exclusive circulation of human E. coli O157 strains belonging to the hypervirulent clade 8 in Neuquén Province. The aim of the present study was to investigate, by a broad molecular characterization, if this particular distribution of E. coli O157 clades in Neuquén is similar to the situation in other regions of the country and if it may be originated in a similar profile in cattle, its main reservoir. Two-hundred and eighty O157 strains (54 bovine and 226 human) isolated between 2006 and 2008 in different regions of Argentina were studied. All strains harbored rfb O157, fliC H7, eae, and ehxA genes. The predominant genotype was stx 2a/stx 2c in human (76.1%) and bovine (55.5%) strains. All human isolates tested by Lineage-Specific Polymorphism Assay (LSPA-6), were lineage I/II; among bovine strains, 94.1% belonged to lineage I/II and 5.9% to lineage I. No LSPA-6 lineage II isolates were detected. Single nucleotide polymorphism (SNP) analysis has revealed the existence of nine clade phylogenetic groups. In our clinical strains collection, 87.6% belonged to the hypervirulent clade 8, and 12.4% were classified as clade 4/5. In bovine isolates, 59.3% strains were clade 8, 33.3% clade 4/5 and 7.4% clade 3. More than 80% of human strains showed the presence of 6 of the 7 virulence determinants described in the TW14359 O157 strain associated with the raw spinach outbreak in the U.S. in 2006. More than 80% of bovine strains showed the presence of 3 of these factors. The q 933 allele, which has been related to high toxin production, was present in 98.2% of clinical strains and 75.9% of the bovine isolates. The molecular characterization of human STEC O157 strains allows us to conclude that the particular situation previously described for Neuquén Province, may actually be a characteristic of the whole country. These genetic features are quite similar to those observed in the bovine reservoir and may be derived from it. This data confirms that, unlike the rest of the world, in Argentina most of the STEC O157 strains present in cattle may cause human infections of varying severity and the marked virulence described for these strains may be related to the high incidence of HUS in our country. © 2016 Elsevier GmbH.


PubMed | Instituto Nacional de Tecnologia Agropecuaria, Laboratorio Central and Servicio Fisiopatogenia
Type: Journal Article | Journal: International journal of medical microbiology : IJMM | Year: 2016

Shiga toxin-producing Escherichia coli (STEC) are important food-borne pathogens associated with human diseases. In Argentina, O157:H7 is the dominant serotype in hemolytic uremic syndrome (HUS) cases. Previously, we have described the almost exclusive circulation of human E. coli O157 strains belonging to the hypervirulent clade 8 in Neuqun Province. The aim of the present study was to investigate, by a broad molecular characterization, if this particular distribution of E. coli O157 clades in Neuqun is similar to the situation in other regions of the country and if it may be originated in a similar profile in cattle, its main reservoir. Two-hundred and eighty O157 strains (54 bovine and 226 human) isolated between 2006 and 2008 in different regions of Argentina were studied. All strains harbored rfbO157, fliCH7, eae, and ehxA genes. The predominant genotype was stx2a/stx2c in human (76.1%) and bovine (55.5%) strains. All human isolates tested by Lineage-Specific Polymorphism Assay (LSPA-6), were lineage I/II; among bovine strains, 94.1% belonged to lineage I/II and 5.9% to lineage I. No LSPA-6 lineage II isolates were detected. Single nucleotide polymorphism (SNP) analysis has revealed the existence of nine clade phylogenetic groups. In our clinical strains collection, 87.6% belonged to the hypervirulent clade 8, and 12.4% were classified as clade 4/5. In bovine isolates, 59.3% strains were clade 8, 33.3% clade 4/5 and 7.4% clade 3. More than 80% of human strains showed the presence of 6 of the 7 virulence determinants described in the TW14359 O157 strain associated with the raw spinach outbreak in the U.S. in 2006. More than 80% of bovine strains showed the presence of 3 of these factors. The q933 allele, which has been related to high toxin production, was present in 98.2% of clinical strains and 75.9% of the bovine isolates. The molecular characterization of human STEC O157 strains allows us to conclude that the particular situation previously described for Neuqun Province, may actually be a characteristic of the whole country. These genetic features are quite similar to those observed in the bovine reservoir and may be derived from it. This data confirms that, unlike the rest of the world, in Argentina most of the STEC O157 strains present in cattle may cause human infections of varying severity and the marked virulence described for these strains may be related to the high incidence of HUS in our country.


PubMed | Instituto Nacional de Tecnologia Agropecuaria, Public Health Ontario, Instituto Nacional Of Enfermedades Infecciosas Anlis Dr Carlos G Malbran and Laboratorio Central
Type: Journal Article | Journal: Genome announcements | Year: 2016

Shiga toxin-producing Escherichia coli strains are worldwide associated with sporadic human infections and outbreaks. In this work, we report the availability of high-quality draft whole-genome sequences for 19 O157:H7 strains isolated in Argentina.


Negro C.L.,CONICET | Senkman L.E.,CONICET | Vierling J.,Laboratorio Central | Repetti M.R.,Laboratorio Central | And 2 more authors.
Bulletin of Environmental Contamination and Toxicology | Year: 2012

We examined the bioaccumulation of α- and β-endosulfan and endosulfan sulfate in tissues from the crab Zilchiopsis collastinensis. There was more endosulfan accumulated in the hepatopancreas (from <2 to 467.8 ng g-1) than in the gonads (from <2 to 52.1 ng g-1) or muscles (<2 ng g-1). The endosulfan concentrations in the hepatopancreas decreased over time and with the endosulfan dilution (p < 0.05). In the gonads there was little bioaccumulation, which did not vary over time (p > 0.05). The hepatopancreas is a dynamic organ that is able to depurate itself, whereas the gonads act as a sink for pesticides. © Springer Science+Business Media, LLC 2012.


PubMed | Instituto Leonidas e Maria Deane, Federal University of Mato Grosso and Laboratorio Central
Type: Journal Article | Journal: Memorias do Instituto Oswaldo Cruz | Year: 2015

This study aimed to investigate the circulation of Orthobunyavirus species in the state of Mato Grosso (MT) Brazil. During a dengue outbreak in 2011/2012, 529 serum samples were collected from patients with acute febrile illness with symptoms for up to five days and 387 pools of female Culex quinquefasciatus captured in 2013 were subjected to nested-reverse transcription-polymerase chain reaction for segment S of the Simbu serogroup followed by nucleotide sequencing and virus isolation in Vero cells. Patients (5/529; 0.9%) from Cuiab (n = 3), Vrzea Grande (n = 1) and Nova Mutum (n = 1) municipalities were positive for the S segment of Oropouche virus (OROV). Additionally, eight/387 Cx. quinquefasciatus pools were positive for the segment, with a minimum infection rate of 2.3. Phylogenetic analysis indicated that all the samples belong to the subgenotype Ia, presenting high homology with OROV strains obtained from humans and animals in the Brazilian Amazon. The present paper reports the first detection of an Orthobunyavirus, possibly OROV, in patients and in Cx. quinquefasciatus mosquitoes in MT. This finding reinforces the notion that arboviruses frequently reported in the Amazon Region circulate sporadically in MT during dengue outbreaks.

Loading Laboratorio Central collaborators
Loading Laboratorio Central collaborators