Persistent Strains
Mostrando 13-24 de 299 artigos, teses e dissertações.
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13. Infectious bronchitis virus: dominance of ArkDPI-type strains in the United States broiler industry during the last decade
In the United States, more than 90% of chicken meat is produced in the southeastern states, and most egg production resides in the eastern half of the country and Texas. Several molecular epidemiological studies have indicated that most infectious bronchitis (IB) virus (IBV) isolates obtained from outbreaks of respiratory disease in these regions correspond
Revista Brasileira de Ciência Avícola. Publicado em: 2010-06
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14. Biofilm formation by atypical enteropathogenic Escherichia coli. / Formação de biofilme por Escherichia coli enteropatogênica atípica.
The atypical Escherichia coli enteropathogenic (EPECa) are capable to cause the lesion A/E and they dont transport the pEAF. Microbial biofilms are defined as complex communities formed by microrganisms adhered to surfaces embedded in an exopolysacharidic matrix. The objective of this study was to verify the capacity of formation of biofilm of 92 strains of
Publicado em: 2010
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15. Iron-limited condition modulates biofilm and adhesive porpoerties in enteroaggregative Escherichia coli / Influência da limitação de ferro nas propriedades adesivas e na formação de biofilme de Escherichia coli enteroagregativa (EAEC)
Escherichia coli enteroaggregative (EAEC) can cause persistent or acute diarrhea. It is characterized by the aggregative adherence pattern on HEp-2 cells, with the presence of bacteria aggregates like stacked bricks. Many strains have the capacity to produce siderophores, low-molecular-mass compounds that capture iron under conditions of low concentration of
Publicado em: 2009
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16. Persistency of Listeria monocytogenes strains in a poultry industrial slaughterhouse located in the state of São Paulo / Persistência de cepas de Listeria monocytogenes em linha de abate industrial de frango em um matadouro localizado no Estado de São Paulo
Listeria monocytogenes is a well-known microorganism as cause of foodborne illness since the occurrence of the first outbreak in 1980. Among foods of animal origin that serve as vehicle of this pathogen, poultry and their products are receiving special attention due to their association with outbreaks. The aims of this research were to evaluate the occurrenc
Publicado em: 2008
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17. In vitro antimicrobial activity of bacteriophages in root canals infected with clinical isolates of Enterococcus faecalis / Estudo in vitro da ação antimicrobiana de bacteriófagos em canais radiculares infectados por isolados clínicos de Enterococcus faecalis
Many studies have investigated different intracanal medications to control infection processes, especially in cases of microbial resistance to disinfection procedures. The purpose of this study was to evaluate the in vitro antimicrobial effect of specific bacteriophages on five isolates of Enterococcus faecalis, as well as the activity of a lysate cocktail i
Publicado em: 2008
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18. The versatile strategies of Escherichia coli pathotypes: a mini review
The widespread species Escherichia coli includes a broad variety of different types, ranging from highly pathogenic strains to avirulent isolates. Few microorganisms are as versatile as E. coli. Pathogenic strains remain a leading cause of severe and persistent infant diarrhea in developing countries. They may be limited to colonization of a mucosal surface
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2006
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19. Demographic and anthropometrical analysis and genotype distribution of chronic hepatitis C patients treated in public and private reference centers in Brazil
Hepatitis C virus (HCV) infection is a serious public health problem, since 80% to 85% of HCV carriers develop a persistent infection that can progress into liver cirrhosis and hepatocarcinoma. Considering that the response of hepatitis C patients to combination therapy with interferon and ribavirin depends on HCV characteristics as well as on host features,
Brazilian Journal of Infectious Diseases. Publicado em: 2004-10
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20. Infecção por Cardiovirus (virus da encefalomielite murina de Theiler - TMEV) em colonias convencionais de ratos
Theiler s murine encephalomyelitis virus (TMEV) is an enteric pathogen of mice and belongs to the Cardiovirus genus in the family Picornaviridae. TMEV is a non-enveloped, icosaedric virus with 20 - 30 nm size and it has an RNAss positive sense genome. TMEV has been divided in two subgroups on the basis of their biological activities after intracerebral inocu
Publicado em: 2004
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21. Estudo da patogenicidade de Escherichia coli diarreiogenicas isolados de crianças portadoras do HIV
E. coli is pathogen relatd to episodes of diarrhea. In our study, 27 strains from 14 HIV + children with persistent diarrhea were analyzed. 51.8% of the patients showed EAEC. These E. coli did not show any virulent factors in the PCR tests, except two that presented ast gen and was not pathogenic serotype. However, 5.1% had invasion in the HeLa cells can not
Publicado em: 2003
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22. East1 toxin and its presence in a changing microbial world
This review shows the structure, mode of action, and actual epidemiological data about EAST1 toxin. It is a particularly intriguing bacterial toxin that may subvert multiple cellular processes to yield intestinal epithelial cell secretion. EAST1 toxin was first described in strains of EAggEC that were associated with persistent diarrhea primarily in developi
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2003
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23. Molecular identification of maize bushy stunt phytoplasm strains collected in São Paulo State. / Identificação molecular de isolados do fitoplasma do enfezamento vermelho do milho coletados no Estado de São Paulo.
Since the middle 80s, an increase in year round cropping of maize resulted in a spread of secondary diseases in the crops major production areas. In this context, maize busy stunt, firstly appointed in Brazil in 1970, is occurring more frequently, often with total damage of production. Infected plants show a complex symptomatology, easily confounded with v
Publicado em: 2002
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24. Estudo da epidemiologia molecular dos Staphylococcus aureus resistentes a oxacilina em pacientes portadores de sindrome de imonodeficiencia adquirida
The Staphylococcus aureus is an important nosocomial pathogen. Methicillin-Resistant Staphylococcus aureus (MRSA) strains has been caused outbreaks and endemics at hospitals, main1y in university and terciary care hospitals. Many control measures are used by health care units to reduce MRSA spread. There is some difficult to eradicate MRSA in hospitals where
Publicado em: 1998