Giovanny Torres

• Bacteriologist. MSc. DSc
• Instituto Colombiano de Medicina Tropical - ICMT

Introduction: Streptococcus uberis is a poorly controlled cause of bovine intramammary infections and a common motivation for the use antibiotics in dairy farms worldwide. Therefore, studying the genomic characteristics of this pathogen is fundamental to understand its complex epidemiology and behavior against antimicrobials. Methods: A comparative...

Aims: This study aims to characterise the virulence factors of S. agalactiae strains isolated from bovine mastitis and their potential association with the antibiotic treatment response. Methods and results: Four different profiles were identified among the 181 S. agalactiae strains using polymerase chain reaction, of which hyl B and cylE were f...

Introduction . Fast and accurate diagnosis is one of the key strategies in the successful control of intramammary infections caused by Staphylococcus aureus . Immunoassays are one of the diagnostic tools that have been proposed for the detection of S. aureus infection because they offer an advantage in terms of cost and are fast and easy to use com...

Genotyping of Staphylococcus aureus isolated from mastitis has become a fundamental tool to understand its complex epidemiology and to evaluate spillover events. The aim of this study was to describe the frequency of genotypes of the S. aureus strains isolated from intramammary infections by spa typing technique, and to evaluate the association bet...

Titanium alloys are attractive for the manufacture of bone implants, due to their high biocompatibility, chemical stability, and adequate resistance/specific weight ratio. However, its ability to reject the adhesion of bacteria and the formation of biofilms is very limited. Further, their low hardness and tribological resistance limits the scope of...

Stool samples from 122 children living in an urban slum (n = 72) and rural (n = 50) areas were analyzed using multi-parallel real-time quantitative PCR to determine intestinal prevalence parasites from two communities in Colombia. Findings indicated a prevalence of 86.1% Blastocystis spp., 62.5% Giardia intestinalis, 19.4% Cryptosporidium spp., 19....

Stool samples from 122 children from urban slum (n = 72) and rural (n = 50) areas were analyzed using multi-parallel real-time qPCR to determine the prevalence of intestinal parasites from two communities in Colombia. Findings indicated a prevalence of 86.1% Blastocystis spp., 62.5% Giardia intestinalis, 19.4% Cryptosporidium spp., 19.4% Ascaris lu...

Staphylococcus aureus represent a serious threat to public health due to food safety, antibiotic resistance, and the potential zoonotic transmission of strains between dairy cattle and humans. Biofilm formation by S. aureus results in chronicity of the infections which confers protection against the immune response and antibiotics. Likewise, biofil...

¿Cómo se desarrolla la glándula?, ¿cómo empieza la producción de calostro y la secreción de leche?, ¿cómo entra en latencia la glándula y posteriormente reinicia el ciclo lactogénico?, ¿cómo se relaciona la glándula con el medio externo y en particular con los microorganismos potencialmente patógenos? A través del curso de posgrado “Fisiología de l...

Bacteria inside biofilms are more persistent and resistant to stress conditions found in the production environment of food processing plants, thus representing a constant risk for product safety and quality. Therefore, the aim of this study was to characterize, using 16S rRNA sequencing, the bacterial communities from biofilms found in four food p...

The ability of Staphylococcus aureus to form biofilms is an important virulence factor because this has been associated with persistent bovine intramammary infections. Different mechanisms of biofilm formation have been described in S. aureus; however, the process has been found to be mainly driven by the ica and bap genes. The presence of the ica...

A randomized controlled trial was performed in 17 Colombian dairy herds to determine the cure risk among cows subclinically infected with Streptococcus agalactiae exposed to 2 antibiotic therapies. Composite milk samples were collected before milking at the onset of the trial (pretreatment) and 2 subsequent times over a period of approximately 63 d...

Objetive: To describe America geographical distribution of A, B, C and D Giardia intestinalis genotypes founded in humans and dogs, and molecular markers and techniques used to detect them, accordingly to scientific literature. Materials and methods: Systematic revision was made it and 19 scientific articles were selected in which Giardia intestina...

The rapid and effective diagnosis of malaria is the determining condition for an appropriate treatment and control of the disease. The sensitivity, specificity and the positive and negative predictive values were evaluated in cases of suspected malaria in Colombia in a comparison of a rapid diagnostic test. the PCR test and the thick blood smear-th...

Introducción. El diagnóstico oportuno y efectivo del paludismo, o malaria, son condiciones determinantes para hacer un tratamiento adecuado de la enfermedad y un control de la misma. Objetivo. Se evaluó la concordancia de la sensibilidad, especificidad, valor diagnóstico positivo y negativo de una prueba rápida y de la reacción en cadena de la poli...