Publications by authors named "Marcia Leyva-Gastelum"
The potential use of arginine kinase from the brown tick Rhipicephalus sanguineus as a biomarker for vector exposure in the surveillance of Rocky Mountain spotted fever.
Rev Argent Microbiol
December 2024
Article Synopsis
- The brown dog tick is a key vector for Rickettsia rickettsii, which causes Rocky Mountain spotted fever (RMSF) in parts of Mexico and the Southwestern U.S.
- Researchers found that a tick protein, arginine kinase (AK), could be used to identify areas with high RMSF risk by measuring immune responses in human and animal sera.
- By mutating a specific part of the AK protein, they confirmed its importance as a marker for RMSF exposure, paving the way for new methods in tracking tick presence and preventing the disease.
Objetivo: Estimar la diversidad de garrapatas, la prevalencia de infestación y tasa de infección de Rickettsia spp. en ganado bovino en la costa del estado de Chiapas. Material y métodos.
View Article and Find Full Text PDFArticle Synopsis
- - Rickettsia species are bacteria that can cause diseases in both animals and humans, typically spread by arthropod vectors like ticks.
- - Researchers conducted a study in the Yucatan region, focusing on pet dogs to collect ticks and test for Rickettsia species through PCR analysis.
- - They discovered Rickettsia amblyommatis and Rickettsia bellii in certain tick species, marking the first detection of these bacteria in this area of Mexico, highlighting the need for ongoing monitoring.
Background: SARS-CoV-2 infection is confirmed with the polymerase chain reaction test. Its positivity is determined by the cycle threshold (Ct), which is inversely proportional to viral load.
Objective: To describe clinical and epidemiological characteristics of SARS-CoV-2-infected patients according to their viral load estimated by Ct.
Introduction: Rocky Mountain spotted fever is a highly lethal infectious disease, particularly if specific treatment with doxycycline is given belatedly.
Objective: To describe the clinical profile of fatal Rocky Mountain spotted fever cases in hospitalized patients in the state of Sonora, México.
Materials And Methods: We conducted a cross-sectional study on a series of 47 deaths caused by Rickettsia rickettsii from 2013 to 2016.