1
|
Arias-Ortiz N, Rodríguez-Betancourt JD, Toro-Toro JE, Navarro-Lechuga É, Jurado-Fajardo DM, Cárdenas-Garzón K, Sánchez-Vásquez GI. The Impact of Health Inequities on Population-Based Breast Cancer Survival in a Colombian Population, 2008-2015. Cancer Control 2024; 31:10732748241244928. [PMID: 38557156 PMCID: PMC10986169 DOI: 10.1177/10732748241244928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 02/03/2024] [Accepted: 03/18/2024] [Indexed: 04/04/2024] Open
Abstract
OBJECTIVE To obtain breast cancer survival estimates in Manizales, Colombia, considering socioeconomic level, health insurance regime and residential area, while adjusting for age, histology and stage at diagnosis. METHODS Analytical cohort study based on breast cancer incident cases recorded by the Population-based Manizales Cancer Registry between 2008-2015. Patients were followed-up for 60 months. Cause-specific survival was calculated using the Kaplan-Meier method for variables of interest, with the Wilcoxon-Breslow-Gehan test for differences. Cox multivariate regression models were fitted. RESULTS 856 breast cancer cases were included. The 5-year cause-specific survival for the entire cohort was 78.2%. It was higher in women with special/exception health insurance, high socioeconomic level, <50 years old, ductal carcinoma, and stages I and II. Residential area did not impact survival. In Cox models, the subsidized health insurance regime (HR: 4.87 vs contributory) and low socioeconomic level (HR: 2.45 vs high) were predictors of the hazard of death in women with breast cancer, adjusted for age, histology, stage and interactions age-stage and insurance-stage. A positive interaction (synergistic effect modification) between health insurance regime and stage regarding to survival was observed. CONCLUSION Socioeconomic factors significantly contribute to the inequities in breast cancer survival, independent of the stage at diagnosis. This suggests the need for comprehensive interventions to remove barriers to accessing the health system. This research provides evidence of survival gaps mediated by certain social determinants of health and generates data on the overall performance of the Colombian health system.
Collapse
Affiliation(s)
- Nelson Arias-Ortiz
- Grupo de Investigación Promoción de la Salud y Prevención de la Enfermedad, Universidad de Caldas, Manizales, Colombia
- Departamento de Salud Pública, Universidad de Caldas, Manizales, Colombia
- Registro Poblacional de Cáncer de Manizales. Instituto de Investigaciones en Salud. Universidad de Caldas, Manizales, Colombia
| | - Juan David Rodríguez-Betancourt
- Registro Poblacional de Cáncer de Manizales. Instituto de Investigaciones en Salud. Universidad de Caldas, Manizales, Colombia
| | | | | | | | - Karen Cárdenas-Garzón
- Grupo de Investigación Infección y Cáncer, Universidad de Antioquia, Medellin, Colombia
| | | |
Collapse
|
2
|
Correa-Navarro Y, López GD, Carazzone C, Giraldo L, Moreno-Piraján JC. Mechanochemical Degradation of Caffeine and Diclofenac Using Biochar of Fique Bagasse in the Presence of Al: Monitoring by Mass Spectrometry. ACS Omega 2023; 8:38905-38915. [PMID: 37901549 PMCID: PMC10601424 DOI: 10.1021/acsomega.3c03051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 09/19/2023] [Indexed: 10/31/2023]
Abstract
Much research has been carried out to remove emerging contaminants using diverse materials. Furthermore, studies related to pollutant degradation have increased over the past decade. Mechanochemical degradation can successfully decompose molecules that are persistent in the environment. In this study, the biochar of fique bagasse with mixtures SiO2, Al, Al2O3, and Al-Al2O3 was treated with a mechanochemical technique using a planetary ball mill to investigate the degradation of caffeine and diclofenac. These tests resulted in the transformation of caffeine and diclofenac due to the use of Al employing mechanochemistry. In fact, through the use of liquid chromatography coupled with mass spectrometry, eight and six subproducts were identified for caffeine and diclofenac, respectively. Additionally, analysis of the molecules proposed for caffeine and diclofenac transformation suggested hydroxylation, demethylation, decarboxylation, oxidation reactions, and cleavage of the C-C and C-N bonds in the pollutants studied. The formation of these transformation products could be possible by reductant oxygen species generated from the molecular oxygen in the presence of aluminum and the energy delivered for ball milling. The results obtained show the potential application in the environmental management of mechanochemical treatment in the elimination of emerging contaminants caffeine and diclofenac.
Collapse
Affiliation(s)
- Yaned
Milena Correa-Navarro
- Departamento
de Química, Facultad de Ciencias Exactas y Naturales, Grupo
de investigación Estudios Ambientales en Agua y Suelo, Universidad de Caldas, Manizales, Caldas 170004, Colombia
- Departamento
de Química, Facultad de Ciencias, Grupo de investigación
en Sólidos Porosos y Calorimetría, Universidad de los Andes, Carrera 1 No. 18 A-12, Bogotá, D.C. 111711, Colombia
| | - Gerson-Dirceu López
- PhysCheMath
Research Group, Facultad de Ciencias y Humanidades, Universidad de América, Avda. Circunvalar No. 20-53, Bogotá, D.C. 111711, Colombia
| | - Chiara Carazzone
- Laboratory
of Advanced Analytical Techniques in Natural Products (LATNAP), Departamento
de Química, Facultad de Ciencias, Universidad de los Andes, Carrera 1 No. 18 A-12, Bogotá, D.C. 111711, Colombia
| | - Liliana Giraldo
- Departamento
de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Sede Bogotá, Bogotá, D.C. 11001, Colombia
| | - Juan Carlos Moreno-Piraján
- Departamento
de Química, Facultad de Ciencias, Grupo de investigación
en Sólidos Porosos y Calorimetría, Universidad de los Andes, Carrera 1 No. 18 A-12, Bogotá, D.C. 111711, Colombia
| |
Collapse
|
3
|
Correa-Navarro Y, Moreno-Piraján JC, Giraldo L. Competitive Adsorption of Caffeine and Diclofenac Sodium onto Biochars Derived from Fique Bagasse: An Immersion Calorimetry Study. ACS Omega 2023; 8:1967-1978. [PMID: 36687082 PMCID: PMC9850469 DOI: 10.1021/acsomega.2c04872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 11/01/2022] [Indexed: 06/17/2023]
Abstract
Pharmaceuticals, including caffeine (CFN) and diclofenac sodium (DCF), are a group of emerging pollutants which have the capacity to prompt harmful effects in flora and fauna, even at relatively low concentrations. Additionally, CFN has been determined as one of the most ubiquitous active compounds in the natural environment, whereas DCF is a widely used nonsteroidal anti-inflammatory drug that has been detected in environmental sources around the world. Conversely, the fique is a plant of the Agavaceae family and of the Fucraea genus.Two native species are cultivated in Colombia, Furcraea cabuya and Furcrae macrophylla, in order to extract their fiber, but in this process a lot of waste is produced. In this study, with the fique residues, thermochemical treatments were carried out and 5 biochar samples were obtained, which were calorimetrically characterized and used to investigate their behavior in competitive adsorption of DCF and CFN. The results of the calorimetric studies show that the biochar prepared from fique bagasse have different porous and chemical characteristics, which is related to the different treatments that were used at the time of their preparation. In addition, it was established that the results of the adsorbate-adsorbent interactions determined by calorimetry allow correlation of the adsorption processes of the molecules under study (CFN and DCF). The results show that the NaOH fique biochar (FB850-3Na) presents the highest adsorption capacity in both simple and competitive tests.
Collapse
Affiliation(s)
- Yaned
Milena Correa-Navarro
- Departamento
de Química, Facultad de Ciencias Exactas y Naturales. Grupo
de investigación Estudios Ambientales en Agua y Suelo, Universidad de Caldas, Manizales170004, Caldas, Colombia
- Departamento
de Química, Facultad de Ciencias, Grupo de investigación
en Sólidos Porosos y Calorimetría, Universidad de los Andes, Carrera 1 No. 18 A-12, Bogotá
D.C.111711, Colombia
| | - Juan Carlos Moreno-Piraján
- Departamento
de Química, Facultad de Ciencias, Grupo de investigación
en Sólidos Porosos y Calorimetría, Universidad de los Andes, Carrera 1 No. 18 A-12, Bogotá
D.C.111711, Colombia
| | - Liliana Giraldo
- Departamento
de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Sede Bogotá, Bogotá D.C.11001, Colombia
| |
Collapse
|
4
|
Rodríguez-Betancourt JD, Arias-Ortiz N. Cutaneous melanoma incidence, mortality, and survival in Manizales, Colombia: a population-based study. J Int Med Res 2022; 50:3000605221106706. [PMID: 35722901 PMCID: PMC9344176 DOI: 10.1177/03000605221106706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 05/23/2022] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE We estimated the cutaneous melanoma (CM) incidence, mortality, and survival in Manizales, Colombia to establish predictors for survival. METHODS This analytical cohort study used CM incident cases during 2006 to 2015 in the Manizales Cancer Registry (n = 132). Incidence and mortality rates were standardized using the direct method. Patients were followed up until 30 November 2020. Cause-specific survival was calculated using the Kaplan-Meier method for variables of interest, with the log-rank test for differences. Cox multivariate regression models were fitted. RESULTS Incidence (per 100,000) increased from 1.6 to 3.0 in men and 2.6 to 2.8 in women during 2006-2010 to 2011-2015, respectively. Mortality was low and stable. Five-year survival was 68.7%, with significant differences according to age (hazard ratio [HR] >70 vs. ≤70 years: 3.37); histological subtype (HR for melanoma not otherwise specified and HR for nodular melanoma vs lentigo malignant melanoma and superficial spreading melanoma: 17.39 and 10.16, respectively); and clinical stage (HR stages III-IV vs. stages I-II: 5.94). CONCLUSION CM is characterized by increasing incidence and unfavorable prognosis, particularly in patients aged >70 years, with melanoma not otherwise specified and nodular melanoma, and advanced stages. Promoting photoprotection and early detection and management of suspicious skin lesions is crucial.
Collapse
Affiliation(s)
- Juan David Rodríguez-Betancourt
- Young Researchers Program, Ministerio de Ciencia, Tecnología e
Innovación, Bogotá, Colombia
- Population-based Manizales Cancer Registry, Instituto de
Investigaciones en Salud, Universidad de Caldas, Manizales, Colombia
- Departamento de Salud Pública, Universidad de Caldas, Manizales,
Colombia
| | - Nelson Arias-Ortiz
- Population-based Manizales Cancer Registry, Instituto de
Investigaciones en Salud, Universidad de Caldas, Manizales, Colombia
- Departamento de Salud Pública, Universidad de Caldas, Manizales,
Colombia
- Grupo de Investigación Promoción de la Salud y Prevención de la
Enfermedad, Universidad de Caldas, Manizales, Colombia
| |
Collapse
|
5
|
Romero MH, Sánchez JA, Hernandez RO. Field Trial of Factors Associated With the Presence of Dead and Non-ambulatory Pigs During Transport Across Three Colombian Slaughterhouses. Front Vet Sci 2022; 9:790570. [PMID: 35141312 PMCID: PMC8820205 DOI: 10.3389/fvets.2022.790570] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 01/03/2022] [Indexed: 11/13/2022] Open
Abstract
Transport by land is an essential component for the commercialization of fattening pigs and can have a negative impact on animal welfare. In slaughterhouses, the presence of dead and non-ambulatory animals is an indicator of poor welfare during transport. The objective of the study was to identify risk factors associated with the frequency of dead and non-ambulatory pigs during transport. A survey was conducted in three Colombian slaughterhouses. Data were collected from 372 batches (n = 18,437 gilts barrows) and transported directly from the farms to the slaughterhouses. Each truck was individually evaluated; a structured survey was administered to drivers, non-ambulatory and dead pigs on arrival were identified and blood samples were obtained from non-ambulatory pigs to assess physiological indicators of stress. Mortality rates per batch at arrival ranged from 0.08 to 0.17% and prevalence of non-ambulatory pigs per batch ranged from 0.84 to 1.37%.The results of the multilevel mixed effects linear regression model identified the following as risk factors associated with the frequency of total transport losses: truck speed (P = 0.04), distance (P < 0.01), transport time (P < 0.01), load size (P < 0.01) and the driver (P < 0.01) including the farm as a fixed effect. This study identified risk factors that increased the probability of total transport losses during land transport under Colombian commercial conditions. But more research that involves commercial drivers is needed to develop effective strategies to improve Colombian pig's transportation chain.
Collapse
Affiliation(s)
- Marlyn H. Romero
- Department of Animal Health, Faculty of Agrarian and Animal Sciences, University of Caldas, Manizales, Colombia
- *Correspondence: Marlyn H. Romero
| | - Jorge Alberto Sánchez
- Department of Animal Health, Faculty of Agrarian and Animal Sciences, University of Caldas, Manizales, Colombia
| | | |
Collapse
|
6
|
López WR, Garcia-Jaramillo DJ, Ceballos-Aguirre N, Castaño-Zapata J, Acuña-Zornosa R, Jovel J. Transcriptional responses to Fusarium oxysporum f. sp. lycopersici (Sacc.) Snyder & Hansen infection in three Colombian tomato cultivars. BMC Plant Biol 2021; 21:412. [PMID: 34496757 PMCID: PMC8425103 DOI: 10.1186/s12870-021-03187-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 08/24/2021] [Indexed: 05/09/2023]
Abstract
BACKGROUND Fusarium oxysporum f. sp. lycopersici (Fol) is a compendium of pathogenic and non-pathogenic fungal strains. Pathogenic strains may cause vascular wilt disease and produce considerable losses in commercial tomato plots. To gain insight into the molecular mechanisms mediating resistance to Fol in tomato, the aim of our study was to characterize the transcriptional response of three cultivars (CT1, CT2 and IAC391) to a pathogenic (Fol-pt) and a non-pathogenic (Fo-npt) strain of Fo. RESULTS All cultivars exhibited differentially expressed genes in response to each strain of the fungus at 36 h post-inoculation. For the pathogenic strain, CT1 deployed an apparent active defense response that included upregulation of WRKY transcription factors, an extracellular chitinase, and terpenoid-related genes, among others. In IAC391, differentially expressed genes included upregulated but mostly downregulated genes. Upregulated genes mapped to ethylene regulation, pathogenesis regulation and transcription regulation, while downregulated genes potentially impacted defense responses, lipid transport and metal ion binding. Finally, CT2 exhibited mostly downregulated genes upon Fol-pt infection. This included genes involved in transcription regulation, defense responses, and metal ion binding. CONCLUSIONS Results suggest that CT1 mounts a defense response against Fol-pt. IAC391 exhibits an intermediate phenotype whereby some defense response genes are activated, and others are suppressed. Finally, the transcriptional profile in the CT2 hints towards lower levels of resistance. Fo-npt also induced transcriptional changes in all cultivars, but to a lesser extent. Results of this study will support genetic breeding programs currently underway in the zone.
Collapse
Affiliation(s)
- Walter Ricardo López
- Departamento de Física y Química. Facultad de Ciencias Naturales, Universidad Nacional de Colombia sede Manizales, Manizales, Caldas, Colombia
- Graduate School of Agricultural Sciences. Facultad de Ciencias Agropecuarias, Universidad de Caldas, Manizales, Caldas, Colombia
| | - Dora Janeth Garcia-Jaramillo
- Graduate School of Agricultural Sciences. Facultad de Ciencias Agropecuarias, Universidad de Caldas, Manizales, Caldas, Colombia
- Departamento de Producción Agropecuaria. Facultad de Ciencias Agropecuarias, Universidad de Caldas. Manizales, Caldas, Colombia
| | - Nelson Ceballos-Aguirre
- Graduate School of Agricultural Sciences. Facultad de Ciencias Agropecuarias, Universidad de Caldas, Manizales, Caldas, Colombia.
- Departamento de Producción Agropecuaria. Facultad de Ciencias Agropecuarias, Universidad de Caldas. Manizales, Caldas, Colombia.
| | - Jairo Castaño-Zapata
- Departamento de Producción Agropecuaria. Facultad de Ciencias Agropecuarias, Universidad de Caldas. Manizales, Caldas, Colombia
| | - Ricardo Acuña-Zornosa
- Graduate School of Agricultural Sciences. Facultad de Ciencias Agropecuarias, Universidad de Caldas, Manizales, Caldas, Colombia
| | - Juan Jovel
- Graduate School of Agricultural Sciences. Facultad de Ciencias Agropecuarias, Universidad de Caldas, Manizales, Caldas, Colombia.
- Research Office. Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada.
| |
Collapse
|
7
|
Rodríguez-Estupiñan P, Correa-Navarro YM, Vargas DP, Giraldo L, Moreno-Piraján JC. Enthalpies of Immersion in Caffeine and Glyphosate Aqueous Solutions of SBA-15 and Amino-Functionalized SBA-15. ACS Omega 2021; 6:21339-21349. [PMID: 34471738 PMCID: PMC8388004 DOI: 10.1021/acsomega.1c01588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
Mesostructured silica SBA-15 and amino-functionalized silica SBA-15-NH2 were synthesized, and then, characterization, adsorption capacity, and immersion enthalpies in caffeine and glyphosate on SBA-15 and SBA-15-NH2 were evaluated. The enthalpy parameter was determined using a local construction Tian-type heat conduction calorimeter. Calorimetric studies in caffeine solutions exhibit negative enthalpy values; exothermic process characteristics for SBA-15 were between -13.90 and -194.06 J g-1 and those for SBA-15-NH2 were between -7.22 and -60.34 J g-1, and the adsorption capacity of caffeine was better in SBA-15 than that in SBA-15-NH2. In contrast, the enthalpies of immersion in glyphosate solutions were -5.06 to -56.2 J g-1 and the immersion of SBA-15-NH2 in each solution generated enthalpy values of -9.06 to -41.2 J g-1, but the adsorption capacity of glyphosate was better in the amino-functionalized SBA-15. The results show that functionalization of SBA-15 produced differences in physicochemical characteristics of solids, since energy and affinity for the calorimetric liquids are related to the surface properties of solids as well as the chemical nature of the target molecule, immersion enthalpy, was different.
Collapse
Affiliation(s)
- Paola Rodríguez-Estupiñan
- Departamento
de Química, Facultad de Ciencias,
Universidad de los Andes, Carrera 1 No. 18A-12, 111711 Bogotá, Colombia
| | - Yaned Milena Correa-Navarro
- Departamento
de Química, Facultad de Ciencias,
Universidad de los Andes, Carrera 1 No. 18A-12, 111711 Bogotá, Colombia
- Departamento
de Química, Facultad de Ciencias,
Universidad de Caldas, Calle 65 No. 26-10, 170002 Manizales, Colombia
| | - Diana P. Vargas
- Departamento
de Química, Grupo de Investigación en Materiales Porosos
con Aplicaciones Tecnológicas y Ambientales, Facultad de Ciencias, Universidad del Tolima, Calle 42 No. 1-02, 730006299 Ibagué, Colombia
| | - Liliana Giraldo
- Departamento
de Química, Facultad de Ciencias,
Universidad Nacional de Colombia, Carrera 30 No. 45-03, 111321 Bogotá, Colombia
| | - Juan Carlos Moreno-Piraján
- Departamento
de Química, Facultad de Ciencias,
Universidad de los Andes, Carrera 1 No. 18A-12, 111711 Bogotá, Colombia
| |
Collapse
|
8
|
Valencia Arbeláez JA, Soto Giraldo A, Villa GJC, Espinosa LFV, Salazar Gutierrez MR, Vargas G. Population dynamics of sugarcane borers, Diatraea spp., under different climatic scenarios in Colombia. PLoS One 2021; 16:e0244694. [PMID: 33449921 PMCID: PMC7810321 DOI: 10.1371/journal.pone.0244694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 12/14/2020] [Indexed: 11/30/2022] Open
Abstract
Seasonal temperature and precipitation patterns on a global scale are main factors to which insects and plants adapt through natural selection, although periodic outbreaks in insect populations may occur in areas where they had not been previously reported, a phenomenon considered as a consequence of global warming. In this study, we estimate the distribution of sugarcane borers, Diatraea spp., under different climate scenarios (rcp26, rcp45, rcp60 and rcp85.) Insects were collected weekly in four sugarcane fields from four different towns in the department of Caldas (Colombia) during 2017, and also in several sugarcane fields in the Cauca River Valley (CRV) between 2010 and 2017. The influence of climatic variables on different agro-ecological zones of the CRV sugarcane fields was defined by climatic data between 2010 and 2017 (maximum and minimum daily temperatures, and accumulated precipitation). The estimate of an optimal niche for Diatraea spp. includes temperatures between 20°C and 23°C, accumulated annual rainfall between 1200 and 1500 mm, dry months with precipitations below 50 mm, slopes of less than 0.05 degrees, crop heterogeneity with an index of 0.2 and primary production values of 1.0. Data suggests Diatraea population is considerably influenced by adverse climate change effects, under the premise of an increase in local and global temperatures, reducing its population niches as well as the number of individuals.
Collapse
Affiliation(s)
- Julián Andrés Valencia Arbeláez
- Facultad de Ciencias Agrícolas, Corporación Universitaria Santa Rosa de Cabal, Santa Rosa de Cabal, Risaralda, Colombia
- * E-mail:
| | - Alberto Soto Giraldo
- Facultad de Ciencias Agrarias, Universidad de Caldas, Manizales, Caldas, Colombia
| | | | | | - Melba Ruth Salazar Gutierrez
- Biological Systems Engineering Department, Washington State University, Prosser, Washington, United States of America
| | - Germán Vargas
- Centro de Investigación de la Caña de Azúcar de Colombia, Florida, Colombia
| |
Collapse
|
9
|
Cobo-Ángel C, Jaramillo-Jaramillo AS, Lasso-Rojas LM, Aguilar-Marin SB, Sanchez J, Rodriguez-Lecompte JC, Ceballos-Márquez A, Zadoks RN. Streptococcus agalactiae is not always an obligate intramammary pathogen: Molecular epidemiology of GBS from milk, feces and environment in Colombian dairy herds. PLoS One 2018; 13:e0208990. [PMID: 30532177 PMCID: PMC6287850 DOI: 10.1371/journal.pone.0208990] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/27/2018] [Indexed: 01/01/2023] Open
Abstract
For many years Streptococcus agalactiae has been considered an obligate intramammary and strictly contagious pathogen in dairy cattle. However, recent reports of S. agalactiae isolation from extramammary sources have contradicted that premise. To gain further insight into the epidemiology of S. agalactiae infection in cattle, we examined its distribution and heterogeneity of strains in bovine milk, bovine feces, and the environment in Colombian dairy farms. First, a longitudinal study was conducted at herd level in 152 dairy herds. Bulk tank milk samples from each herd where collected twice a month for six months. A follow-up study with a cross sectional design at the cow level was conducted in a subset of 25 farms positive for S. agalactiae. Cow-level milk samples from 1712 lactatting cows and 1545 rectal samples were collected, as well as 120 environmental samples. Samples were used for S. agalactiae detection and genotyping using Multi Locus Sequence Typing. Results showed sporadic rather than repeated isolation of S. agalactiae from bulk tank milk in 40% of the positive herds, challenging the idea that S. agalactiae is a highly contagious pathogen causing chronic infections. S. agalactiae was isolated from rectal or environmental samples in 32% and 12% of cross-sectional study farms, respectively, demonstrating that the bacteria can survive in extramammary sources and that S. agalactiae is not an obligate intramammary pathogen. The same strain was isolated from rectal and bulk tank milk samples in eight farms, suggesting that fecal shedding is frequent, and contributes to the presence of S. agalactiae in bulk tank. High within-herd heterogeneity of strains was found, which is distinct from the situation in developed dairy industries. These new epidemiological findings should be considered to adjust surveillance and control recommendations for S. agalactiae.
Collapse
Affiliation(s)
- Claudia Cobo-Ángel
- Research Group in Milk Quality and Veterinary Epidemiology, Faculty of Agricultural Sciences, Universidad de Caldas, Manizales, Colombia
- * E-mail:
| | - Ana S. Jaramillo-Jaramillo
- Research Group in Milk Quality and Veterinary Epidemiology, Faculty of Agricultural Sciences, Universidad de Caldas, Manizales, Colombia
| | - Laura M. Lasso-Rojas
- Research Group in Milk Quality and Veterinary Epidemiology, Faculty of Agricultural Sciences, Universidad de Caldas, Manizales, Colombia
| | - Sandra B. Aguilar-Marin
- Research Group in Milk Quality and Veterinary Epidemiology, Faculty of Agricultural Sciences, Universidad de Caldas, Manizales, Colombia
| | - Javier Sanchez
- Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada
| | - Juan C. Rodriguez-Lecompte
- Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada
| | - Alejandro Ceballos-Márquez
- Research Group in Milk Quality and Veterinary Epidemiology, Faculty of Agricultural Sciences, Universidad de Caldas, Manizales, Colombia
| | - Ruth N. Zadoks
- Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
- Moredun Research Institute, Penicuik, United Kingdom
| |
Collapse
|