RESUMO
Abstract Background: Bovine tuberculosis (BTB) and brucellosis are associated with devastating losses in the livestock sector in Colombia and even in developed countries. Real-time disease surveillance is a key strategy to control and eradicate infectious disease outbreaks. Objective: To design an epidemiological tool for monitoring BTB and brucellosis in Colombia. Methods: An interactive platform for disease mapping of BTB and brucellosis during an observation period between years 2004 and 2019 was designed. Results: Our analysis showed that the provinces of Cundinamarca and Valle del Cauca are regions affected by BTB and brucellosis epidemics, respectively (p<0.001). Furthermore, increased case detection of BTB was reported in 2012 and brucellosis in 2019 (p<0.001). Conclusions: This epidemiological platform allows tracking BTB and tuberculosis hotspots, identifying trends over time, and provides useful information to animal health authorities for designing new strategies in control programs.
Resumen Antecedentes: La tuberculosis bovina (TBB) y la brucelosis están asociadas con problemas persistentes en la ganadería Colombiana e incluso en los países desarrollados. La vigilancia de enfermedades en tiempo real es una estrategia clave para controlar y erradicar brotes de enfermedades infecciosas. Objetivo: Diseñar una herramienta epidemiológica para monitorear TBB y brucelosis en Colombia. Métodos: Se diseñó un panel de control interactivo para el mapeo de ambas enfermedades durante el periodo de observación entre los años 2004 y 2019. Resultados: El análisis de la herramienta mostró que las Provincias de Cundinamarca y Valle del Cauca han sido áreas epidémicas para TBB y brucelosis, respectivamente (p<0,001). Además, se encontró un aumento de la detección de casos de TBB en 2012 y de brucelosis durante 2019 (p<0,001). Conclusiones: Este panel epidemiológico permite el seguimiento de puntos críticos de TBB y tuberculosis, identificando sus tendencias a lo largo del tiempo, y proporciona información útil para las autoridades de sanidad animal que diseñan nuevas estrategias para los programas de control.
Resumo Antecedentes: A tuberculose bovina (TBB) e a brucelose estão associadas a problemas persistentes no campo da pecuária na Colômbia e até em países desenvolvidos. Portanto, a vigilância de doenças em tempo real é uma estratégia essencial para controlar e erradicar surtos de doenças infecciosas. Objetivo: Projetar uma ferramenta epidemiológica para monitorar a TB e a brucelose na Colômbia. Métodos: Um painel de controle interativo foi projetado para o mapeamento de ambas as doenças entre 2004 e 2019 como período de observação. Resultados: A análise da ferramenta mostrou que as Províncias de Cundinamarca e Valle del Cauca foram áreas epidêmicas para TBB e brucelose, respectivamente (p<0,001). Além disso, foi encontrado um aumento na detecção de casos em 2012 para TBB e brucelose durante 2019 (p<0,001). Conclusões: Esse painel epidemiológico poderia permitir o monitoramento de pontos críticos dessas doenças, identificando tendências ao longo do tempo, fornecendo informações úteis para as autoridades de saúde animal que elaboram novas estratégias para programas de controle.
RESUMO
BACKGROUND: The intracellular concentration of heavy-metal cations, such as copper, nickel, and zinc is pivotal for the mycobacterial response to the hostile environment inside macrophages. To date, copper transport mediated by P-type ATPases across the mycobacterial plasma membrane has not been sufficiently explored. RESULTS: In this work, the ATPase activity of the putative Mycobacterium tuberculosis P1B-type ATPase CtpB was associated with copper (I) transport from mycobacterial cells. Although CtpB heterologously expressed in M. smegmatis induced tolerance to toxic concentrations of Cu2+ and a metal preference for Cu+, the disruption of ctpB in M. tuberculosis cells did not promote impaired cell growth or heavy-metal accumulation in whole mutant cells in cultures under high doses of copper. In addition, the Cu+ ATPase activity of CtpB embedded in the plasma mem-brane showed features of high affinity/slow turnover ATPases, with enzymatic parametersKM 0.19 ± 0.04 µM and Vmax 2.29 ± 0.10 nmol/mg min. In contrast, the ctpB gene transcription was activated in cells under culture conditions that mimicked the hostile intraphagosomal environment, such as hypoxia, nitrosative and oxidative stress, but not under high doses of copper. CONCLUSIONS: The overall results suggest that M. tuberculosis CtpB is associated with Cu+ transport from mycobacterial cells possibly playing a role different from copper detoxification.