Prevalencia de parásitos intestinales en niños preescolares de barrios vulnerables de Bogotá

Introducción: Infecciones parasitarias intestinales (IPI) son enfermedades tropicales desatendidas, a pesar de que su prevalencia es alta en muchos países en desarrollo. El impacto en la salud pública de los IPI es importante, especialmente para los niños debido al efecto negativo sobre el crecimiento y el desarrollo. Objectivos: Este estudio examina la prevalencia y factores de riesgo de IPI en niños preescolares de barrios en riesgo, incluidos los de las familias desplazadas. Materiales y Métodos: estudio transversal entre 239 niños preescolares de dos barrios vulnerables de Bogotá. Se recogieron muestras fecales y se examinaron microscópicamente utilizando dos técnicas (directa y Ritchie). Se aplicó cuestionario para indagar factores relacionados con el parasitismo intestinal. Resultados: Se encontró una prevalencia de 26,4% de parásitos intestinales patógenos (Giardia duodenalis, Blastocystis spp, Trichuris trichiura, Ascaris lumbricoides y Hymenolepis nana). La regresión logística resultó en cuatro factores de riesgo: hermanos ?5 años (OR 2.33 [1.077-5.021]), los perros callejeros (OR 2.91 [0.867-9.767]), los ocupantes de la casa (OR 2.57 [1.155-5.706]) y el sexo del niño/a (OR 2.17 [1.022-4.615]). Discusión: La presencia del IPI en los niños preescolar es un problema de salud importante en Bogotá y que debe abordarse. Una alta prevalencia de protozoos se encontró comparado con helmintos. La implementación de políticas que aborden los factores de riesgo podría ser un primer paso en la disminución de la prevalencia del IPI. El antecedente de desplazamiento no cambio ni el tipo de parásito ni la prevalencia de parasitismo.Introduction: Intestinal parasitic infections (IPIs) are neglected tropical diseases, even though their prevalence is high in many developing countries. The public health impact of IPIs is substantial, in particular for children due to the negative effect on growth and development. Objectives: This study examines the prevalence and risk factors of IPIs in preschool-children from at-risk neighborhoods, including those from internally displaced families. Materials and Methods: A cross-sectional study among 239 preschool-children from two vulnerable neighborhoods in Bogotá. Fecal samples were collected and microscopically examined (direct and Ritchie technique) and data regarding related factors was obtained through a questionnaire. Results: A prevalence of 26.4% for pathogenic parasites (Giardia duodenalis, Blastocystis spp, Trichuris trichiura, Ascaris lumbricoides, and Hymenolepis nana) was found. Logistic regression resulted in four risk factors: siblings ?5 years (OR 2.33 [1.077-5.021]), stray dogs (OR 2.91 [0.867-9.767]), household members (OR 2.57 [1.155-5.706]) and child's sex (OR 2.17 [1.022-4.615]). Discussion: IPI presence in preschool children is an important health issue in Bogotá which should be addressed. A high protozoan prevalence was found compared to helminthes. Implementing policies addressing risk factors could be a first step in decreasing IPI prevalenc

Prevalencia de parásitos intestinales en niños preescolares de barrios vulnerables de Bogotá

Introducción: Infecciones parasitarias intestinales (IPI) son enfermedades tropicales desatendidas, a pesar de que su prevalencia es alta en muchos países en desarrollo. El impacto en la salud pública de los IPI es importante, especialmente para los niños debido al efecto negativo sobre el crecimiento y el desarrollo. Objectivos: Este estudio examina la prevalencia y factores de riesgo de IPI en niños preescolares de barrios en riesgo, incluidos los de las familias desplazadas. Materiales y Métodos:  estudio transversal entre 239 niños preescolares de dos barrios vulnerables de Bogotá. Se recogieron muestras fecales y se examinaron microscópicamente utilizando dos técnicas (directa y Ritchie). Se aplicó cuestionario para indagar factores relacionados con el parasitismo intestinal. Resultados: Se encontró una prevalencia de 26,4% de parásitos intestinales patógenos (Giardia duodenalis, Blastocystis spp, Trichuris trichiura, Ascaris lumbricoides y Hymenolepis nana). La regresión logística resultó en cuatro factores de riesgo: hermanos ≤5 años (OR 2.33 [1.077-5.021]), los perros callejeros (OR 2.91 [0.867-9.767]), los ocupantes de la casa (OR 2.57 [1.155-5.706]) y el sexo del niño/a (OR 2.17 [1.022-4.615]). Discusión: La presencia del IPI en los niños preescolar es un problema de salud importante en Bogotá y que debe abordarse. Una alta prevalencia de protozoos se encontró comparado con helmintos. La implementación de políticas que aborden los factores de riesgo podría ser un primer paso en la disminución de la prevalencia del IPI. El antecedente de desplazamiento no cambio ni el tipo de parásito ni la prevalencia de parasitismo.Introduction: Intestinal parasitic infections (IPIs) are neglected tropical diseases, even though their prevalence is high in many developing countries. The public health impact of IPIs is substantial, in particular for children due to the negative effect on growth and development. Objectives: This study examines the prevalence and risk factors of IPIs in preschool-children from at-risk neighborhoods, including those from internally displaced families. Materials and Methods: A cross-sectional study among 239 preschool-children from two vulnerable neighborhoods in Bogotá. Fecal samples were collected and microscopically examined (direct and Ritchie technique) and data regarding related factors was obtained through a questionnaire. Results: A prevalence of 26.4% for pathogenic parasites (Giardia duodenalis, Blastocystis spp, Trichuris trichiura, Ascaris lumbricoides, and Hymenolepis nana) was found. Logistic regression resulted in four risk factors: siblings ≤5 years (OR 2.33 [1.077-5.021]), stray dogs (OR 2.91 [0.867-9.767]), household members (OR 2.57 [1.155-5.706]) and child’s sex (OR 2.17 [1.022-4.615]). Discussion: IPI presence in preschool children is an important health issue in Bogotá which should be addressed. A high protozoan prevalence was found compared to helminthes. Implementing policies addressing risk factors could be a first step in decreasing IPI prevalence

Prevalencia de parásitos intestinales en niños preescolares de barrios vulnerables de Bogotá

Introducción: Infecciones parasitarias intestinales (IPI) son enfermedades tropicales desatendidas, a pesar de que su prevalencia es alta en muchos países en desarrollo. El impacto en la salud pública de los IPI es importante, especialmente para los niños debido al efecto negativo sobre el crecimiento y el desarrollo. Objectivos: Este estudio examina la prevalencia y factores de riesgo de IPI en niños preescolares de barrios en riesgo, incluidos los de las familias desplazadas. Materiales y Métodos:  estudio transversal entre 239 niños preescolares de dos barrios vulnerables de Bogotá. Se recogieron muestras fecales y se examinaron microscópicamente utilizando dos técnicas (directa y Ritchie). Se aplicó cuestionario para indagar factores relacionados con el parasitismo intestinal. Resultados: Se encontró una prevalencia de 26,4% de parásitos intestinales patógenos (Giardia duodenalis, Blastocystis spp, Trichuris trichiura, Ascaris lumbricoides y Hymenolepis nana). La regresión logística resultó en cuatro factores de riesgo: hermanos ≤5 años (OR 2.33 [1.077-5.021]), los perros callejeros (OR 2.91 [0.867-9.767]), los ocupantes de la casa (OR 2.57 [1.155-5.706]) y el sexo del niño/a (OR 2.17 [1.022-4.615]). Discusión: La presencia del IPI en los niños preescolar es un problema de salud importante en Bogotá y que debe abordarse. Una alta prevalencia de protozoos se encontró comparado con helmintos. La implementación de políticas que aborden los factores de riesgo podría ser un primer paso en la disminución de la prevalencia del IPI. El antecedente de desplazamiento no cambio ni el tipo de parásito ni la prevalencia de parasitismo.Introduction: Intestinal parasitic infections (IPIs) are neglected tropical diseases, even though their prevalence is high in many developing countries. The public health impact of IPIs is substantial, in particular for children due to the negative effect on growth and development. Objectives: This study examines the prevalence and risk factors of IPIs in preschool-children from at-risk neighborhoods, including those from internally displaced families. Materials and Methods: A cross-sectional study among 239 preschool-children from two vulnerable neighborhoods in Bogotá. Fecal samples were collected and microscopically examined (direct and Ritchie technique) and data regarding related factors was obtained through a questionnaire. Results: A prevalence of 26.4% for pathogenic parasites (Giardia duodenalis, Blastocystis spp, Trichuris trichiura, Ascaris lumbricoides, and Hymenolepis nana) was found. Logistic regression resulted in four risk factors: siblings ≤5 years (OR 2.33 [1.077-5.021]), stray dogs (OR 2.91 [0.867-9.767]), household members (OR 2.57 [1.155-5.706]) and child’s sex (OR 2.17 [1.022-4.615]). Discussion: IPI presence in preschool children is an important health issue in Bogotá which should be addressed. A high protozoan prevalence was found compared to helminthes. Implementing policies addressing risk factors could be a first step in decreasing IPI prevalence

Melengestrol Acetate at Greater Doses Than Typically Used for Estrous Synchrony in Bovine Females Does Not Mimic Endogenous Progesterone in Regulation of Secretion of Luteinizing Hormone and 17β-Estradiol

Our working hypothesis was that doses of melengestrol acetate (MGA) greater than those typically administered in estrous synchrony regimens would regulate secretion of LH and 17β-estradiol (E2) as endogenous progesterone (P4) does during the midluteal phase of the estrous cycle. We also hypothesized that endogenous P4 from the CL would interact with MGA to further decrease the frequency of LH pulses and E2. Cows on Day 5 of their estrous cycle (Day 0 = estrus) were randomly assigned to an untreated control group (CONT, n = 5) or to one of six MGA treatment groups (n = 5 per group): 1) MGA administered orally each day via a gelatin capsule at a dose of 0.5 mg MGA/cow with the CL present (0.5CL); 2) 0.5 mg MGA/cow daily in the absence of CL (0.5NO); 3) 1.0 mg MGA with CL present (1.OCL); 4) 1.0 mg MGA without CL (1.ONO); 5) 1.5 mg MGA with CL present (1.5CL); 6) 1.5 mg without CL (1.5NO). MGA was administered for 10 days (Day 5 = initiation of treatment). To regress CL, cows assigned to groups without CL received injections of prostaglandin F2α (PGF, 0; 25 mg) on Days 6 and 7 of their estrous cycle. All cows were administered PGF2α. at the end of the 10-day treatment period. During the treatment period, daily blood samples were collected to determine concentrations of E2. Serial blood samples were collected at 15-min intervals for 24 h on Days 8, 11, and 14 to determine pattern of LH secretion. Frequency of LH pulses on Days 8, 11, and 14 was greater (p \u3c 0.05) in cows without CL (0.5NO, 1.ONO, and 1.5NO) than in cows with CL (0.5CL, 1.OCL, 1.5CL, and CONT). Mean concentrations of LH were greater (p \u3c 0.05) in cows from the 0.5NO group on Days 8 and 11 and were greater (p \u3c 0.05) in cows from the 0.5NO, 1.ONO, and 1.5NO groups on Day 14 as compared to cows with CL. Overall mean concentrations of LH across Days 8, 11, and 14 were greatest (p \u3c 0.05) in cows from the 0.5NO group and were also greater (p \u3c 0.05) in cows from the 0.5NO, 1.ONO, and 1.5NO groups as compared to cows in the 0.5CL, 1.OCL, 1.5CL, and CONT groups. Mean concentrations of E2 during the treatment period were greater (p \u3c 0.05) in cows from the 0.5NO group than in cows from either the 1.ONO or the 1.5NO group; these values were also greater (p \u3c 0.05) in cows of the 0.5NO, 1.ONO, and 1.5NO groups as compared to cows of the 1.OCL and CONT groups. Therefore, we reject our working hypothesis because doses of MGA greater than those typically used in estrous synchrony protocols did not suppress LH and E2 to the same extent that endogenous P4 does. In addition, MGA treatment when CL were present did not result in a further suppression of LH pulse frequency or of E2 as compared to the values in control cows with functional CL

A putative antiviral role of plant cytidine deaminases

[EN] Background: A mechanism of innate antiviral immunity operating against viruses infecting mammalian cells has been described during the last decade. Host cytidine deaminases (e.g., APOBEC3 proteins) edit viral genomes, giving rise to hypermutated nonfunctional viruses; consequently, viral fitness is reduced through lethal mutagenesis. By contrast, sub-lethal hypermutagenesis may contribute to virus evolvability by increasing population diversity. To prevent genome editing, some viruses have evolved proteins that mediate APOBEC3 degradation. The model plant Arabidopsis thaliana genome encodes nine cytidine deaminases (AtCDAs), raising the question of whether deamination is an antiviral mechanism in plants as well. Methods: Here we tested the effects of expression of AtCDAs on the pararetrovirus Cauliflower mosaic virus (CaMV). Two different experiments were carried out. First, we transiently overexpressed each one of the nine A. thaliana AtCDA genes in Nicotiana bigelovii plants infected with CaMV, and characterized the resulting mutational spectra, comparing them with those generated under normal conditions. Secondly, we created A. thaliana transgenic plants expressing an artificial microRNA designed to knock-out the expression of up to six AtCDA genes. This and control plants were then infected with CaMV. Virus accumulation and mutational spectra where characterized in both types of plants. Results: We have shown that the A. thaliana AtCDA1 gene product exerts a mutagenic activity, significantly increasing the number of G to A mutations in vivo, with a concomitant reduction in the amount of CaMV genomes accumulated. Furthermore, the magnitude of this mutagenic effect on CaMV accumulation is positively correlated with the level of AtCDA1 mRNA expression in the plant. Conclusions: Our results suggest that deamination of viral genomes may also work as an antiviral mechanism in plants.This work was supported by the former Spanish Ministerio de Ciencia e Innovación-FEDER grant BFU2009-06993 to SFE. JMC was supported by the CSIC JAE-doc program/Fondo Social Europeo. AG-P was supported by a grant for Scientific and Technical Activities and by grant P10-CVI-65651, both from Junta de Andalucía.Martín, S.; Cuevas, J.; Grande-Perez, A.; Elena Fito, SF. (2017). A putative antiviral role of plant cytidine deaminases. F1000Research. 1-14. https://doi.org/10.12688/f1000research.11111.2S11

The anti-bacterial iron-restriction defence mechanisms of egg white; the potential role of three lipocalin-like proteins in resistance against Salmonella

Salmonella enterica serovar Enteritidis (SE) is the most frequently-detected Salmonella in foodborne outbreaks in the European Union. Among such outbreaks, egg and egg products were identified as the most common vehicles of infection. Possibly, the major antibacterial property of egg white is iron restriction, which results from the presence of the iron-binding protein, ovotransferrin. To circumvent iron restriction, SE synthesise catecholate siderophores (i.e. enterobactin and salmochelin) that can chelate iron from host iron-binding proteins. Here, we highlight the role of lipocalin-like proteins found in egg white that could enhance egg-white iron restriction through sequestration of certain siderophores, including enterobactin. Indeed, it is now apparent that the egg-white lipocalin, Ex-FABP, can inhibit bacterial growth via its siderophore-binding capacity in vitro. However, it remains unclear whether ex-FABP performs such a function in egg white or during bird infection. Regarding the two other lipocalins of egg white (Cal-γ and α-1-glycoprotein), there is currently no evidence to indicate that they sequester siderophores