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

Evaluation of the Hearing Aid Rehabilitation Questionnaire in Dutch: Examination of Its Psychometric Properties and Potential Use as A Screening Instrument

Items pertaining to hearing and hearing aids from the Hearing Aid Rehabilitation Questionnaire were applied to a heterogeneous sample of Dutch patients aged 55 years and more to evaluate their potential use in hearing screening. Subjects aged 55+ were recruited from a large general practitioners practice to participate. Three groups were formed: a group of 63 persons with a hearing aid, a group of 64 without a hearing aid but with sufficient hearing impairment to qualify for hearing aid reimbursement, and a group of 85 non-hearing impaired persons. Factor and reliability analyses revealed a structure with two scales regarding hearing, namely functionality and social hearing and three scales pertaining to hearing aids, namely hearing aid stigma, pressure to be assessed and not wanting a hearing aid. Scale validity was assessed with pure tone averages over the frequencies 1, 2 and 4 kHz and with a visual analogue scale for subjective hearing. The derived scales can be applied reliably in audiological assessment in an adult hearing screen setting to detect experienced hearing problems as well as attitudes related to hearing and hearing aids

Bone-Anchored Hearing Aid: A Comparison of Surgical Techniques

Objective: To determine which bone-anchored hearing aid (BAHA) implantation surgical technique is associated with the fewest major postoperative complications and shortest time between surgery and use of the BAHA. The techniques evaluated were 1) a free retroauricular "full-thickness" skin graft, 2) a pedicled parieto-occipital epidermal graft, 3) a dermatome-edicled parieto-occipital dermal graft, and 4) two broad pedicled local epidermal skin envelopes/skin flaps. Study Design: Retrospective case study. Setting: Tertiary referral center. Patients: One hundred forty-three patients who received a BAHA at Maastricht University Medical Center between November 1996 and January 2007. Number and mean age of patients in each group: Technique 1 (n = 30; mean age, 55 yr), Technique 2 (n = 45; mean age, 54 yr), Technique 3 (n = 47; mean age, 55 yr), and Technique 4 (n = 21; mean age, 54 yr). Main Outcome Measures: Cumulative proportion of implants that remained free of major complications versus follow-up interval, time between surgery and use of BAHA. Results: Technique 4 (2 broad pedicled local epidermal envelopes/skin flaps) has a significantly higher proportion of implants that remained free of major complications during first year of follow-up (91%; p = 0.021). Pairwise comparisons revealed that Technique 4 also has a significantly shorter time until use (2 mo) than Techniques 1 (2.5 mo), 2, and 3 (both 2.3 mo). Conclusion: Two broad pedicled, local epidermal envelopes/flaps are associated with significantly fewer major complications and have one of the shortest times between surgery and use of the BAHA. The use of a dermatome is not associated with fewer major complications. We recommend Technique 4 as the preferred standard in BAHA surgery to minimize complications, postoperative medication, discomfort, and cost

Frequency shifts with age in click-evoked otoacoustic emissions of preterm infants

A previous study [Brienesse et al. (1997). Pediatr. Res. 42, 478-483] demonstrated a positive shift with increasing postmenstrual age (PMA) in the frequencies of synchronized spontaneous otoacoustic emissions (SSOAEs) in preterm infants. We used a mixed model approach to describe a shift with PMA in the spectra of click-evoked otoacoustic emissions (CEOAEs) measured in a group of 22 preterm infants. The rate in shift in CEOAE spectral components was found to be frequency dependent, with a mean estimate of 10 Hz/week for frequencies around 2 kHz and 30 Hz/week for frequencies around 4.25 kHz. This rate decreased with increasing PMA. Because SSOAEs are often part of the CEOAE response, a comparison was made between the shifts in SSOAEs and CEOAEs in a sub-group of 16 preterm infants. The results indicate that the shifts found for both types of OAE are similar, which supports a common mechanism for this change in OAE-characteristic. At present it is not clear to what extent developmental processes in the cochlea and the middle ear can account for these frequency shifts in the spectra of CEOAEs and SSOAEs during the preterm period. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3583542

Evaluation Criteria for Chromosome Instability Detection by FISH to Predict Malignant Progression in Premalignant Glottic Laryngeal Lesions

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Chromosome instability predicts progression of premalignant lesions of the larynx

The histopathology of premalignant laryngeal lesions does not provide reliable information on the risk of malignant transformation, hence we examined new molecular markers which can easily be implemented in clinical practice.Dual-target fluorescence in situ hybridisation (FISH) for chromosome 1 and 7 centromeres was performed on tissue sections of laryngeal premalignancies in 69 patients. Chromosome instability was indicated by numerical imbalances and/or polysomy for chromosomes 1 and 7. Additionally, immunostainings for p53, Cyclin D1 and (p)FADD expression were evaluated. Malignant progression was recorded. Eighteen patients with carcinoma in situ (CIS) were treated after diagnosis and excluded from follow-up.Chromosome instability was strongly associated with a high risk of malignant transformation, especially in lower grade lesions (hyperplasia, mild and moderate dysplasia; odds ratio=8.4, p=0.004). Patients with lesions containing chromosome instability showed a significantly worse 5-year progression-free survival than those with premalignancies without chromosome instability (p=0.002). Neither histopathology nor the protein markers predicted progression in univariate analysis, although histopathological diagnosis, p53 and FADD contributed positively to chromosome instability in multivariate analysis.Chromosome instability is associated with malignant progression of laryngeal premalignancies, especially in lower grade lesions. These results may contribute to better risk counselling, provided that they can be validated in a larger patient set