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Maria Gabriela Echeverria - One of the best experts on this subject based on the ideXlab platform.
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phylogenetic analysis of Suid herpesvirus 1 isolates from argentina
Veterinary Microbiology, 2011Co-Authors: Maria Soledad Serena, German Ernesto Metz, Eduardo Carlos Mortola, Maria Gabriela EcheverriaAbstract:Argentinean Suid Herpesvirus 1 isolates were compared with reference strains and sequences available at GenBank and phylogenetically analyzed. A short fragment of the gE gene of the immunodominant epitopes was used for preliminary grouping of isolates by phylogenetic analysis. The analysis of the partial gC gene provided more precise genetic typing and segregation into the main genotypes I and II. Results confirmed that the Argentinean genotype I isolates predominate in our country. The topology of the partial gC gene was similar to that previously reported. The Argentinean type I isolates belonged to one cluster and grouped together with NIA-3 and American and Brazilian genotype I strains. However, the results obtained by the algorithms allow inferring that the Yamagata S-81 and Mer (genotype II) strains are grouped together.
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characterization of Suid herpesvirus 1 field isolates from argentina
Revista Argentina De Microbiologia, 2010Co-Authors: Maria Soledad Serena, German Ernesto Metz, Eduardo Carlos Mortola, G Martin P Ocampos, S E Gambaro, Maria Gabriela EcheverriaAbstract:The genomic characterization of Suid herpesvirus 1 (SHV-1) isolates from Argentina was accomplished by restriction pattern analysis using the BamHI, BstEII and XhoI enzymes. Type II genome has been described only once in Argen- tina. This study revealed considerable homogeneity of BamHI endonuclease sites in all the strains analyzed, accord- ing to the number and size of the fragments. No deletion of BamHI fragment #7 among the Argentinean isolates suggests that these strains are wild-type. In addition, the main antigenic domain of glycoprotein E of all the Argentinean strains, as well as the reference strains and sequences available in the GenBank, were characterized. The similarity percent oscillated between 99 and 100%.
Edwin A Mitchell - One of the best experts on this subject based on the ideXlab platform.
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maternal smoking before and during pregnancy and the risk of sudden unexpected infant death
Pediatrics, 2019Co-Authors: Tatiana M Anderson, Juan Lavista Ferres, Rachel Y Moon, Richard Goldstein, Janmarino Ramirez, Edwin A MitchellAbstract:OBJECTIVES: Maternal smoking during pregnancy is an established risk factor for sudden unexpected infant death (Suid). Here, we aim to investigate the effects of maternal prepregnancy smoking, reduction during pregnancy, and smoking during pregnancy on Suid rates. METHODS: We analyzed the Centers for Disease Control and Prevention Birth Cohort Linked Birth/Infant Death Data Set (2007–2011: 20 685 463 births and 19 127 Suids). Suid was defined as deaths at RESULTS: Suid risk more than doubled (adjusted odds ratio [aOR] = 2.44; 95% confidence interval [CI] 2.31–2.57) with any maternal smoking during pregnancy and increased twofold between no smoking and smoking 1 cigarette daily throughout pregnancy. For 1 to 20 cigarettes per day, the probability of Suid increased linearly, with each additional cigarette smoked per day increasing the odds by 0.07 from 1 to 20 cigarettes; beyond 20 cigarettes, the relationship plateaued. Mothers who quit or reduced their smoking decreased their odds compared with those who continued smoking (reduced: aOR = 0.88, 95% CI 0.79–0.98; quit: aOR = 0.77, 95% CI 0.67–0.87). If we assume causality, 22% of Suids in the United States can be directly attributed to maternal smoking during pregnancy. CONCLUSIONS: These data support the need for smoking cessation before pregnancy. If no women smoked in pregnancy, Suid rates in the United States could be reduced substantially.
Janmarino Ramirez - One of the best experts on this subject based on the ideXlab platform.
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maternal smoking before and during pregnancy and the risk of sudden unexpected infant death
Pediatrics, 2019Co-Authors: Tatiana M Anderson, Juan Lavista Ferres, Rachel Y Moon, Richard Goldstein, Janmarino Ramirez, Edwin A MitchellAbstract:OBJECTIVES: Maternal smoking during pregnancy is an established risk factor for sudden unexpected infant death (Suid). Here, we aim to investigate the effects of maternal prepregnancy smoking, reduction during pregnancy, and smoking during pregnancy on Suid rates. METHODS: We analyzed the Centers for Disease Control and Prevention Birth Cohort Linked Birth/Infant Death Data Set (2007–2011: 20 685 463 births and 19 127 Suids). Suid was defined as deaths at RESULTS: Suid risk more than doubled (adjusted odds ratio [aOR] = 2.44; 95% confidence interval [CI] 2.31–2.57) with any maternal smoking during pregnancy and increased twofold between no smoking and smoking 1 cigarette daily throughout pregnancy. For 1 to 20 cigarettes per day, the probability of Suid increased linearly, with each additional cigarette smoked per day increasing the odds by 0.07 from 1 to 20 cigarettes; beyond 20 cigarettes, the relationship plateaued. Mothers who quit or reduced their smoking decreased their odds compared with those who continued smoking (reduced: aOR = 0.88, 95% CI 0.79–0.98; quit: aOR = 0.77, 95% CI 0.67–0.87). If we assume causality, 22% of Suids in the United States can be directly attributed to maternal smoking during pregnancy. CONCLUSIONS: These data support the need for smoking cessation before pregnancy. If no women smoked in pregnancy, Suid rates in the United States could be reduced substantially.
Albert Loubser - One of the best experts on this subject based on the ideXlab platform.
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Trots Suid-Afrikaans!
2015Co-Authors: Albert LoubserAbstract:Suid-Afrikaanse telers kan soms tussen twee gevaarlike pole pendel. Aan die een kant is hulle arrogant en oenskynlik onbewus dat daar 'n wereld buite hul eie bekende wereld (die plaas) bestaan - byvoorbeeld dat geglo word dit wat hy doen of het, is altyd beter as elders.
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Trots Suid-Afrikaans! : genetika & veehantering
2015Co-Authors: Albert LoubserAbstract:Suid-Afrikaanse telers kan soms tussen twee gevaarlike pole pendel. Aan die een kant is hulle arrogant en oenskynlik onbewus dat daar 'n wereld buite hul eie bekende wereld (die plaas) bestaan - byvoorbeeld dat geglo word dit wat hy doen of het, is altyd beter as elders.
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Suid-Afrika staan kop omhoog!
2014Co-Authors: Albert LoubserAbstract:Wanneer Suid-Afrikaanse veetelers hierdie uitgawe van Veeplaas lees, is ek seker almal is gedaan na die intensiteit van die afgelope drie maande. Die hoeveelheid en impak van al die geleenthede sedert Maart is amper oorweldigend, en ek haal my hoed af vir sommige telers wat ek by al drie groot skoue gesien het!
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Suid-Afrika aan die voorpunt : redakteursbrief
2014Co-Authors: Albert LoubserAbstract:Daar is geen twyfel nie dat die volgende eeu van ekonomiese vooruitgang aan die ontwikkelende wereld gaan behoort. Die BRICS-lande, waarvan Suid-Afrika nou deel is, gaan definitief die offensief lei en hulle sal waarskynlik die volgende G7-lande wees. En in daardie sin sal Indie, China en Brasilie dan die VSA, Brittanje en Japan van die volgende eeu wees.
Laurids Siig Christensen - One of the best experts on this subject based on the ideXlab platform.
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the population biology of Suid herpesvirus 1
Acta Pathologica Microbiologica et Immunologica Scandinavica, 1995Co-Authors: Laurids Siig ChristensenAbstract:Suid herpesvirus 1 (SHV-1) is the causative agent of Aujeszky's disease (AD, pseudorabies), known worldwide as a major economical threat to pig farming. Measures are taken in many countries to control or eradicate the disease and considerable effort therefore has been focused on the elucidation of the epizootiology of the infection. These studies were greatly facilitated by the possibilities, first reported in the early eighties, to identify SHV-1 strains by means of restriction fragment pattern (RFP) analysis. In the present thesis some molecular biological aspects of SHV-1 are reviewed. In addition, studies are reviewed focusing on three topics: (i) methodological aspects of molecular strain identification, (ii) various epizootiological features of the SHV-1 infection, and (iii) the population dynamics of coexisting virus particles comprising a field strain, tentatively defined as a transmissible entity. A systematization of the European isolates of SHV-1 was elaborated based on molecular characterization of various genome types and an evolutionary tree for some of the distinct types was suggested. For some of the types geographical niches could be identified indicating that the intertypic differences had been stable for decades. By the characterization of 5-10 isolates from each herd, in which a SHV-1 strain had been newly introduced, strain inherent non-intertypic genomic variations consistently could be demonstrated. Some strains appeared to consist of fairly homogeneous pools of genomic variants, while other strains appeared highly heterogeneous. Some exhibited hypervariable regions in the genome. The pool of genomic variants present in a strain was found to be a highly specific and most often a conservative characteristic of a strain. Yet, fluctuations in the proportions of subpopulations occasionally were seen. Thus, while one isolate from an outbreak might be a poor representative of the pool of variants comprising the causative strain, the analysis of 5-10 isolates from each outbreak might taken together provide the basis of an extremely fine resolving potential. Outbreaks of AD during the finishing stage of the Danish eradication campaign were subjected to intensive molecular epizootiological studies. The analysis of representative older isolates of SHV-1 revealed that only type III was present in Denmark prior to 1985. In 1985 type IIa isolates emerged in a border area, and since 1986 type IIp and IIa were the only types identified in Denmark. Severe epizootics have been recorded in border areas in Denmark since the winter of 1986/87.(ABSTRACT TRUNCATED AT 400 WORDS)
