Javier Gutiérrez-Jiménez

• Doctor en Ciencias
• Professor (Full) at Universidad de Ciencias y Artes de Chiapas

Ecoepidemiology is an emerging field that attempts to explain how biotic, environmental, and even social factors influence the dynamics of infectious diseases. Particularly in vector-borne diseases, the study under this approach offers us an overview of the pathogens, vectors, and hosts that coexist in a given region and their ecological determinan...

Como estrategia adicional y aplicable dentro del tema de fisiología bacteriana, desde el segundo semestre de 2015 se implementó una actividad en el laboratorio que consiste en la creación de obras de arte hechas sobre medios de cultivo en placa de Petri, utilizando bacterias que originan colonias con determinadas características bioquímicas.

Las playas arenosas representan casi la mitad de la costa oceánica y proveen servicios como la recreación, alimentación, disipación de oleaje, almacenamiento y filtración de agua, mineralización de nutrientes, asimilación de contaminantes y sostenimiento de la biodiversidad; son uno de los sitios de mayor demanda para uso recreativo, por lo que es...

Background: The Trypanosoma cruzi parasite is the causal agent of Chagas disease, recognized by the World Health Organization as a neglected tropical disease. Currently there are seven discrete typing units (DTUs) of T. cruzi distributed in America, but there are still gaps about its distribution in some endemic regions. Materials and Methods: Seve...

Positive cases of Streptococcusin tilapia cause serious economic losses, however, there are no reports on the prevalence of Streptococcus in tilapia farmedwithin ponds and cagesin the tropics, this is the first report about it. The goal was to compare the prevalence ofbeta-haemolytic streptococci in tilapia (Oreochromis niloticus) from pond and cag...

The beaches of Chiapas, at the Mexican Pacific, are an important nesting site for the Lepidochelys olivacea species. As they are migratory marine reptiles, they are difficult to study in the natural environment, so the nesting process is important to obtain biological information. Microbiological studies in these species allow us to understand the...

Cosmosoma maishei (Laguerre, Antenor 1:153–172, 2014) is an Arctiini moth restricted to high elevations in the mountain Mesoamerican biodiversity hotspots. A narrow distribution and high ecological specialization make this moth susceptible to climate change effects. To our knowledge, no reports have described its potential distribution and genetic...

The purpose of the work was to determine the Klebsiella species affecting hospitalized infants at southeastern Mexico, their antimicrobial susceptibility profile, the resistance phenotype, and the presence of ESBL enzymes. Methodology. From 2015 to 2020, a total of 794 records of bacteriological cultures positive to Klebsiella spp. were included. T...

Describir el quehacer del laboratorio de biología molecular y genética del instituto de Ciencias Biológicas de la Universidad de Ciencias y Artes de Chiapas. https://repositorio.unicach.mx/handle/20.500.12753/4476?fbclid=IwAR1kAeBsRg7E84t7enFmF8Zo8831Afwfug2Qivmh66FbAEUxZtU7uLeJK4A

Collared peccaries (Pecari tajacu) roam the forests of natural areas in America. Wild collared peccary appears to be a carrier for bacteria associated with infections in humans and animals, however, the presence of diarrheagenic E. coli (DEC) pathotypes has not been studied in the captive collared peccary. This study aimed to study the prevalence o...

Piglets suffer from diarrhea caused by the shiga toxin-producing Escherichia coli (STEC) and can be carriers of the bacteria, with public health consequences in developing countries. The aim of the present study was to study the prevalence of STEC O157 in feces of 465 piglets and 54 food mix from backyard systems, the antimicrobial susceptibility o...

Introduction: Chagas disease is a neglected disease in the American continent. The southern Mexican state of Chiapas has the highest incidence rate of Chagas disease in the country. The disease, mainly caused by Tripanosoma cruzi in Mexico, is more prevalent in males than in females but the scientific basis for the sex-related tropism is not compl...

We describe the perception towards COVID-19 in marginalized communities of youth, in Southern Mexico. These perceptions include trustable information but also some major problems (e.g. a conspiratory origin for the disease). These problems may represent an obstacle for COVID-19 prevention and treatment.

El presente trabajo describe la relación existente de dos componentes ambientales en la presentación de Estreptococosis en tilapia, que reporta altos índices de mortalidad en sistemas abiertos. Por esta razón, se evaluaron el oxígeno y temperatura de 10 unidades de producción acuícola de tilapia de sistemas de jaulas flotantes y la relación con el...

Escherichia coli strains, including diarrheagenic E. coli (DEC), are among the most important causes of childhood diarrhea in developing countries. Since these strains also colonize healthy children, additional factors leading to diarrhea remains to be discovered. We therefore conducted a comprehensive study to investigate if supplementary virulenc...

Objective. To determine the rate of Bordetella pertussis infection in children admitted to a paediatric emergency hospital service. Material and methods. The positivity rate to B. pertussis infection was determined in 344 enrolled children under five-year old measured by culture, RT-PCR, clinical and laboratory predictors. Results. The positive r...

Analyze the first report of an infected triatomine in an urban house in Tuxtla Gutiérrez, Chiapas; identifying the vector specie's, the virulence and the genetic group of Trypanosoma cruzi and a possible infection in the house inhabitants. The specimen was transferred to the laboratory where a stool sample was obtained by abdominal pressure. The vi...

The green iguana appears to be a carrier for bacteria causing gastrointestinal infections in humans. The presence of diarrheagenic E. coli (DEC) pathotypes, however, has not been studied in this reptile. The aim of the current work was to investigate the prevalence of DEC in the intestines of 240 captive green iguanas, their phylogenetic groups, an...

The green iguana appears to be a reservoir for bacteria causing gastrointestinal infections in humans. The presence of diarrheogenic E. coli (DEC) pathotypes, however, has not been studied in this reptile. The aim of the current work was to investigate the prevalence of DEC in the intestines of 240 captive green iguanas, their phylogenetic groups,...

RESUMEN Escherichia coli secretora de la toxina shiga es un contaminante del agua y alimentos de origen animal, que causa severas infecciones en el humano y animales. Sin embargo, no se ha determinado la frecuencia y el perfil antimicrobiano de este patotipo bacteriano en heces de bovinos en el estado de Chiapas. El objetivo fue determinar la preva...

Background: The state of Chiapas has held the first place of extreme poverty in Mexico. The majority of Chiapas' municipalities are inhabited by marginalized, indigenous populations, who usually present diarrhea of unknown etiology. We evaluated the nutritional status, intestinal parasites, and common bacterial pathogens, including DEC (diarrheage...

Introduction: Children under five years of age from developing countries are in risk of not achieving an adequate human development due to stunting and extreme poverty. They were also affected by intestinal helminths. Inhabitants of the state of Chiapas, the poorest population in Mexico, register the highest prevalence of child malnutrition as wel...

Introduction: Among beta-hemolytic streptococci, Streptococcus pyogenes causes a wide variety of human disease including pharyngitis, necrotizing fasciitis and streptococcal toxic syndrome. Group A Streptococcus (GAS) uses a variety of virulence traits to colonize and then cause damage to the host; others species of beta-hemolytic streptococci are...

Los rotíferos son microorganismos acuáticos que se alimentan de bacterias, flagelados y ciliados. Se reconocen 2,030 especies, organizadas en los grupos Seisonidea, Monogononte y Bdelloidea. Los rotíferos aportan fuentes de carbono orgánico a los miembros de niveles más elevados. El propósito del trabajo fue documentar videográficamente rotíferos p...

Se describen los reservorios de bacterias en la especie Iguana iguana.

Una colección científica consiste en un acervo sistematizado de material biológico en donde se resguardan, preservan y se estudian los ejemplares curados de un grupo taxonómico, por ejemplo, las plantas o fauna en general. Algunas consisten de grupos taxonómicos más especializados como aves, mamíferos, mariposas, peces, reptiles, entre otros. Las c...

Mexico is the most populated country in Latin America and the second largest in extension after Brazil. According to the population census (2010), more than 80% of its inhabitants are under the age of 50 years. Throughout the years, Mexico has been plunged into poverty and this calamity is expanding overtime. In addition, income inequality has been...

Objectives: genetically characterize a strain of Trypanosoma cruzi isolated in the state of Chiapas, Mexico, and evaluate its effect on gestation in Wistar rats. Methods: evaluation was conducted of the damage caused to gestation in Wistar rats infected with the strain ITR/MX/10/COP of T. cruzi, the causal agent of Chagas disease. Two groups of ten...

Annona lutescens Safford is a small tree in which crude extracts have demonstrated biological activities including analgesic, anti-tumoral, vermifuge, insecticide and antibacterial; however, this biological activity against diarrheagenic E. coli strains have not been evaluated. In vitro assays performed in this study demonstrate that leaf crude aqu...

Student motivation in class is extremely important because it may lead to a successful learning experience, followed by academic accomplishment. As a strategy to motivate undergraduate students in a microbiology course, we established an awards system named the “Gold, Silver, and Bronze Petri Dish Awards in Microbiology.” The awards system was eith...

Introduction. Trypanosoma cruzi is the etiologic agent of Chagas disease. Transmission is through insects of theTriatominae subfamily, where Triatoma dimidiata is one of the main vectors in Mexico and Central America. This parasite transmission depends on factors such as the infection rate of the vector and its defecation time after feeding. Aim. E...

RESUMEN Introducción. El parásito Trypanosoma cruzi es el agente etiológico de la enfermedad de Chagas. Su transmisión es a través de insectos de la subfamilia Triatominae, donde Triatoma dimidiata es uno de los vectores principales en México y Centro América. La transmisión del parásito depende de factores como la tasa de infección de las distinta...

Leishmaniasis is a parasitic disease affecting skin, mucocutaneous tissue, and/or internal organs and it is endemic in southern Mexico including Chiapas.The disease is sometimes difficult to diagnose with classical laboratory methods and therefore a molecular PCR approach was utilized in the following case report. A male 55 years-old from Villacorz...

This study relates to a method for evaluating the degradation efficiency of Ascaris lumbricoides eggs through a Fenton reaction, using hydrogen peroxide (H2O2) at 100, 250, and 500 mg/L, ferrous sulfate (FeSO4) at 458 mg/L Fe(2+) and pH values of 3, 4.5, and 6. The experiments were conducted according to a 3(2) experimental design, with 1:1, 3:1, a...

Los helmintos son los gusanos parasitarios causantes de las infecciones más comunes que afectan al ser humano y otros animales. Se encuentran en grandes concentraciones en aguas residuales y lodos (restos de estas aguas) que, a su vez, son utilizados en la agricultura, por los nutrientes que aportan al suelo, tales como nitrógeno y fósforo. Una vía...

Los helmintos son los gusanos parasitarios causantes de las infecciones más comunes que afectan al ser humano y otros animales. Se encuentran en grandes concentraciones en aguas residuales y lodos, que a su vez, son utilizados en la agricultura, por los nutrientes que aportan al suelo, tales como nitrógeno y fósforo. Una vía de transmisión de huevo...

Access to potable water is a priority for highly-marginalized rural communities of Chiapas, Mexico where consumption of poorly sanitized water has fostered severe diarrheal diseases among children. Interventions aimed to reduce contaminants present in water are necessary to reduce morbidity and mortality rates. In this work we evaluated the efficie...

RESUMEN El juego de Jeopardy! es un concurso televisivo en el que se hacen preguntas a los participantes sobre diversos temas de cultura general. herramienta didáctica denominada Jeopardy bioquímico basada en el juego Microbial Jeopardy!™ con algunas modificaciones. Para crear la presentación se usó el programa informático Power Point (Microsoft Of...

For many years Chiapas, Mexico's poorest state, has had the highest rate of child mortality due to intestinal infections of unknown etiology in the country. To begin identifying the infectious agents, our work determined the prevalence of intestinal parasites as well as malnutrition in children from Chiapas's three most impoverished municipalities:...

El presente libro, resultado de estudios etnobotónicos realizados por investigadores de la Universidad de Ciencias y Artes de Cliiapas y de lo Universidad Nocional Autónoma de México, recupera la tradición oral que sobre los plantas medicinales tienen los zoques de las comunidades de Copainalá, Rayón, Tapalapa y Tapilula. Documenta también los nomb...

We studied protozoa and free-living rotifers wastewater Sabinal River in Tuxtla Gutiérrez, Chiapas, México. There were specimens of protozoa of the genus Paramecium spp. As well as rotifers of the genus Notommata sp.

The Internet is one of the information and communication technologies (ICTs) that does not place space-timely barriers, since it allows information exchange through a system of documents that lead to other related and interlinked texts; this kind of technology is having an impact upon every other daily-life activities of mankind, particularly notic...

A hallmark of enteroaggregative Escherichia coli (EAEC) infection is a formation of biofilm, which comprises a mucus layer with immersed bacteria in the intestines of patients. While studying the mucinolytic activity of Pic in an in vivo system, rat ileal loops, we surprisingly found that EAEC induced hypersecretion of mucus, which was accompanied...

The pic gene is harbored on the chromosomes of three important pathogens: enteroaggregative Escherichia coli (EAEC), uropathogenic E. coli (UPEC), and Shigella flexneri. Since Pic is secreted into the intestinal lumen during EAEC infection, we sought to identify intestinal-mucosal substrates for Pic. Pic did not damage epithelial cells, cleave fodr...

Escherichia coli enteropatógena (EPEC) es una de las principales causas de diarrea en niños menores de dos años en países en vías de desarrollo. La principal característica histopatológica de la infección es una lesión que induce la EPEC en el intestino conocida como la lesión A/E (adherencia y eliminación). Las bacterias se adhieren a los enteroci...

Enteropathogenic Escherichia coli (EPEC) is a leading cause of diarrhea in infants less than two years of age in developing countries. To induce diarrhea EPEC uses several virulence factors acting on a still unknown and mysterious mechanism. The hallmark of EPEC infection is a histological intestinal alteration known as the attaching and effacing (...