Results: 34

Infecção pelo Helicobacter pylori e perfil imunológico em pacientes com diferentes doenças gastroduodenais

Arq. gastroenterol; 55 (2), 2018
ABSTRACT BACKGROUND: The association between infection with Helicobacter pylori and different gastroduodenal diseases is related to bacterial, host and environmental factors. Studies have demonstrated an association between the genetic diversity of H. pylori, especially in the vacA and cagA genes, and ...

Prevalencia de cepas cagA-positivo en la región de Coquimbo, determinada mediante nested-qPCR en muestras fecales

Rev. méd. Chile; 146 (5), 2018
Background: Helicobacter pylori is the most significant pathogen associated with gastric diseases, including gastric cancer. Infected patients with strains that are CagA-positive generally have worse outcomes than those infected with CagA-negative strains. Patients infected with CagA-positive strains hav...

Infection by Streptococcus pneumoniae in children with or without radiologically confirmed pneumonia

J. pediatr. (Rio J.); 94 (1), 2018
Abstract Objective: Community-acquired pneumonia is an important cause of morbidity in childhood, but the detection of its causative agent remains a diagnostic challenge. The authors aimed to evaluate the role of the chest radiograph to identify cases of community-aquired pneumonia caused by typical bac...

Humoral and cellular immune response of mice challenged with Yersinia pestis antigenic preparations

Braz. j. infect. dis; 21 (6), 2017
ABSTRACT Objectives: The plague, which is an infectious disease caused by Yersinia pestis, still threatens many populations in several countries. The worldwide increase in human plague cases and the potential use of the bacteria as a biological weapon reinforce the need to study the immunity that is ind...

Salivary anti-PGL-1 IgM may indicate active transmission of Mycobacterium leprae among young people under 16 years of age

Braz. j. infect. dis; 21 (5), 2017
Abstract Considering that the main route of Mycobacterium leprae transmission is the upper respiratory tract, detection of salivary antibodies can be a useful tool for diagnosing early infection. The study aimed to analyze salivary anti-PGL-1 IgA and IgM antibodies in 169 children aged 4-16 years old, wh...

IL-10 down-regulates the expression of survival associated gene hspX of Mycobacterium tuberculosis in murine macrophage

Braz. j. infect. dis; 21 (4), 2017
Abstract Mycobacterium tuberculosis (MTB) adopts a special survival strategy to overcome the killing mechanism(s) of host immune system. Amongst the many known factors, small heat shock protein 16.3 (sHSP16.3) of MTB encoded by gene hspX has been reported to be critical for the survival of MTB. In the pr...

Correlation between virulence markers of Helicobacter pylori in the oral cavity and gastric biopsies

Arq. gastroenterol; 54 (3), 2017
ABSTRACT BACKGROUND: The clinical outcome of Helicobacter pylori infection has been associated with virulence factors. The presence of these factors is useful as molecular markers in the identification of the high risk for developing severe gastric pathologies. OBJECTIVE: To correlate the presence of v...

Patrón EPIYA en cepas de Helicobacter pylori CagA positivas en pacientes del Hospital Regional de Talca

Rev. méd. Maule; 33 (1), 2017
BACKGROUND: The clinical outcome of Helicobacter pylori (H. pylori) infection has been related to the presence of CagA protein. This protein is highly polymorphic and its oncogenic ability depends on the number and type of tyrosine phosphorylation sites in the EPIYAs repeat sequences (A, B, C and D). AIM...

Ehrlichia canis and Rickettsia spp. in dogs from urban areas in Paraiba state, northeastern Brazil

Abstract The aims of our study was to identify Ehrlichia canis and antibodies against Rickettsia spp. belonging to the spotted fever group (SFG) in dogs sampled from Paraiba state, northeastern Brazil. Blood and serum samples collected by convenience from dogs in urban areas of five municipalities were a...