ABSTRACT A hallmark of enteroaggregative Escherichia coli (EAEC) infection is a formation biofilm, which comprises mucus layer with immersed bacteria in the intestines patients. While studying mucinolytic activity Pic an vivo system, rat ileal loops, we surprisingly found that EAEC induced hypersecretion mucus, was accompanied by increase number mucus-containing goblet cells. Interestingly, isogenic pic mutant (EAEC Δ ) unable to cause this hypersecretion. Furthermore, purified also able...

For many years Chiapas, Mexico's poorest state, has had the highest rate of child mortality due to intestinal infections unknown etiology in country. To begin identifying infectious agents, our work determined prevalence parasites as well malnutrition children from Chiapas's three most impoverished municipalities: Pantepec, Chanal, and Larrainzar.In this cross-sectional study, conducted between January November 2009, we assessed by means coproparasitological analysis <5 age (N=250)...

Escherichia coli enteropatógena (EPEC) es una de las principales causas diarrea en niños menores dos años países vías desarrollo. La principal característica histopatológica la infección lesión que induce EPEC el intestino conocida como A/E (adherencia y eliminación). Las bacterias se adhieren a los enterocitos permiten acumulación actina del citoesqueleto región apical célula, hasta formar estructura tipo "pedestal" causar eliminación microvellosidades intestinales. A pesar conoce modo...

The green iguana appears to be a carrier for bacteria causing gastrointestinal infections in humans. presence of diarrheagenic E. coli (DEC) pathotypes , however, has not been studied this reptile. aim the current work was investigate prevalence DEC intestines 240 captive iguanas, their phylogenetic groups, and antibiotic susceptibility profile. strains were isolated from 41.7% (N=100/240) intestinal content iguanas. identified 25.9% screened population detected majority (62%, p=0.009] those...

The state of Chiapas has held the first place extreme poverty in Mexico. majority Chiapas' municipalities are inhabited by marginalized, indigenous populations, who usually present diarrhea unknown etiology. We evaluated nutritional status, intestinal parasites, and common bacterial pathogens, including DEC (diarrheagenic Escherichia coli) strains, 178 children under five years age with a high (rural) moderate (urban) degree marginalization.Z-scores for anthropometric indexes from were...

Los casos positivos a Streptococcus en tilapia ocasionan graves pérdidas económicas, sin embargo, no hay informes sobre la prevalencia de cultivada estanque y jaula el trópico, este es primer informe al respecto. El objetivo fue comparar beta hemolíticos (Oreochromis niloticus) procedentes cultivos jaula, Chiapas, México, además, evaluar susceptibilidad hacia los antibióticos. Se recolectaron 155 peces entre 250-300 gr 31 granjas (12 estanques 19 jaulas). La mayor (45.16%, P<0.05)...

Introduction: Children under five years of age from developing countries are in risk not achieving an adequate human development due to stunting and extreme poverty. They were also affected by intestinal helminths. Inhabitants the state Chiapas, poorest population Mexico, register highest prevalence child malnutrition as well parasitic infections. With purpose fight against poverty hunger, Mexican government launched a social program called “Prospera”. The aim this work was determine...

Background:The state of Chiapas has held the first place extreme poverty in Mexico.The majority Chiapas' municipalities are inhabited by marginalized, indigenous populations, who usually present diarrhea unknown etiology.We evaluated nutritional status, intestinal parasites, and common bacterial pathogens, including DEC (diarrheagenic Escherichia coli) strains, 178 children under five years age with a high (rural) moderate (urban) degree marginalization.Methods: Z-scores for anthropometric...

This study relates to a method for evaluating the degradation efficiency of Ascaris lumbricoides eggs through Fenton reaction, using hydrogen peroxide (H2O2) at 100, 250, and 500 mg/L, ferrous sulfate (FeSO4) 458 mg/L Fe(2+) pH values 3, 4.5, 6. The experiments were conducted according 3(2) experimental design, with 1:1, 3:1, 5:1 (H2O2/Fe(2+)) molar ratios. oxidation flocculation stages performed 130 rpm during 2 hours 25-30 20 min, respectively. As result an average 91.2% egg was achieved 6...

RESUMENIntroducción. El parásito Trypanosoma cruzi es el agente etiológico de la enfermedad Chagas. Su transmisión a través insectos subfamilia Triatominae, donde Triatoma dimidiata uno los vectores principales en México y Centro América. La del depende factores como tasa infección las distintas especies tiempo defecación después alimentación. Objetivo. Evaluar con T. cinco estadios determinar postprandial. Material métodos. Treinta individuos cada estadio fueron alimentados sangre infectada...

Among beta-hemolytic streptococci, Streptococcus pyogenes causes a wide variety of human disease including pharyngitis, necrotizing fasciitis and streptococcal toxic syndrome. Group A (GAS) uses virulence traits to colonize then cause damage the host; others species streptococci are considered as emerging pathogens for humans. Despite its recognized virulence, only few studies have investigated factors GAS strains isolated in Mexico.We conducted an epidemiological study investigate...

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, study under this approach offers us overview pathogens, vectors, hosts coexist a given region their ecological determinants. As result this, risk predictions can be established changing environment it may impact human populations. This paper aimed at evaluating some ecoepidemiological...

Las prácticas de laboratorio en la enseñanza microbiología universidad son capital importancia, ya que permiten un aprendizaje significativo los alumnos, quienes se formulan preguntas sobre fenómeno expuesto, detonando aplicación del método científico. Uno tópicos esta asignatura microbios benéficos para humanidad, entre encuentra el hongo Penicillium. Este microorganismo es amplia distribución naturaleza. Se usa elaboración alimentos, producción pigmentos y obtención penicilina, antibiótico...

ABSTRACT Managing infections caused by multidrug‐resistant Gram‐negative bacilli is a major public health concern, particularly in hospitals where surfaces can act as reservoirs for resistant microorganisms. Identifying these bacteria hospital environments crucial improving healthcare safety. This study aimed to analyse environmental samples from veterinary identify prevalent microorganisms and detect antimicrobial resistance patterns. A total of 183 surface were collected 26 areas at the...

Access to potable water is a priority for highly-marginalized rural communities of Chiapas, Mexico where consumption poorly sanitized has fostered severe diarrheal diseases among children.Interventions aimed reduce contaminants present in are necessary morbidity and mortality rates.In this work we evaluated the efficiency point use purification system, Llaveoz, eradicate total coliform (TC) bacteria diarrheagenic E. coli (DEC) strains 62 paired samples obtained from households during dry...

Background: The Trypanosoma cruzi parasite is the causal agent of Chagas disease, recognized by World Health Organization as a neglected tropical disease. Currently there are seven discrete typing units (DTUs) T. distributed in America, but still gaps about its distribution some endemic regions. Materials and Methods: Seventeen isolated from Chiapas Oaxaca Mexico were identified amplification C-5 sterol desaturase gene. Results: Three DTUs cruzi, TcI (6), TcII (10), TcIV (1) detected...