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1.
J Mol Evol ; 91(5): 647-668, 2023 10.
Article in English | MEDLINE | ID: mdl-37526693

ABSTRACT

The Nucleo-Cytoplasmic Large DNA Viruses (NCLDVs) infect a wide range of eukaryotic species, including amoeba, algae, fish, amphibia, arthropods, birds, and mammals. This group of viruses has linear or circular double-stranded DNA genomes whose size spans approximately one order of magnitude, from 100 to 2500 kbp. The ultimate origin of this peculiar group of viruses remains an open issue. Some have argued that NCLDVs' origin may lie in a bacteriophage ancestor that increased its genome size by subsequent recruitment of eukaryotic and bacterial genes. Others have suggested that NCLDVs families originated from cells that underwent an irreversible process of genome reduction. However, the hypothesis that a number of NCLDVs sequences have been recruited from the host genomes has been largely ignored. In the present work, we have performed pangenomic analyses of each of the seven known NCLDVs families. We show that these families' core- and shell genes have cellular homologs, supporting possible escaping-gene events as part of its evolution. Furthermore, the detection of sequences that belong to two protein families (small chain ribonucleotide reductase and Erv1/Air) and to one superfamily [2OG-Fe(II) oxygenases] that are for distribution in all NCLDVs core and shell clusters encoding for oxygen-dependent enzymes suggests that the highly conserved core these viruses originated after the Proterozoic Great Oxidation Event that transformed the terrestrial atmosphere 2.4-2.3 Ga ago.


Subject(s)
Evolution, Molecular , Viruses , Animals , Phylogeny , DNA Viruses/genetics , Viruses/genetics , Eukaryota/genetics , Oxygen , Genome, Viral/genetics , Mammals/genetics
2.
BMC Public Health ; 20(1): 1771, 2020 Nov 23.
Article in English | MEDLINE | ID: mdl-33228642

ABSTRACT

BACKGROUND: Guaranteeing the sexual and reproductive health and rights (SRHR) of populations living in fragile and humanitarian settings is essential and constitutes a basic human right. Compounded by the inherent vulnerabilities of women in crises, substantial complications are directly associated with increased risks of poor SRHR outcomes for displaced populations. The migration of Venezuelans, displaced due to current economic circumstances, is one of the largest in Latin America's history. This study aims to provide an overview of the sexual and reproductive health (SRH) issues affecting migrant Venezuelan women in the state of Roraima, Brazil. METHODS: Face-to-face interviews were conducted from 24 to 30 November 2019. Data collection covered various issues involving access to and use of SRH services by 405 migrant Venezuelan women aged 18-49 years. The Minimum Initial Service Package readiness assessment tools, available from the Inter-Agency Working Group on Reproductive Health in Crises, were used in the data collection. RESULTS: Most commonly, the women reported unmet family planning needs. Of these, a significant proportion reported being unable to obtain contraceptive methods, particularly long-acting reversible contraceptives, either due to the woman's inability to access them or their unavailability at healthcare centres. Although a significant proportion of women were largely satisfied with the attention received at the maternity hospital, both before and during childbirth, 24.0% of pregnant or postpartum women failed to receive any prenatal or postnatal care. CONCLUSION: Meeting the essential SRHR needs of migrant Venezuelan women in Roraima, Brazil is a challenge that has yet to be fully addressed. Given the size of this migrant population, the Brazilian healthcare system has failed to adapt sufficiently to meet their needs; however, problems with healthcare provision are similar for migrants and Brazilian citizens. Efforts need to be encouraged not only in governmental health sectors, but also with academic, non-governmental and international organisations, including a coordinated approach to ensure a comprehensive SRHR response. Given the current high risks associated with the SARS-CoV-2 pandemic, meeting the SRHR needs of migrant populations has become more critical than ever.


Subject(s)
Maternal Health/statistics & numerical data , Transients and Migrants/statistics & numerical data , Brazil , Female , Health Services Needs and Demand , Humans , Pregnancy , Reproductive Health , Reproductive Rights , Sexual Health , Venezuela/ethnology
3.
Arch Microbiol ; 200(2): 267-273, 2018 Mar.
Article in English | MEDLINE | ID: mdl-29022087

ABSTRACT

The increasing industrial utilization of tellurium has resulted in an important environmental pollution with the soluble, extremely toxic oxyanion tellurite. In this context, the use of microorganisms for detoxifying tellurite or tellurium biorecovery has gained great interest. The ability of different Shewanella strains to reduce tellurite to elemental tellurium was assessed; the results showed that the reduction process is dependent on electron transport and the ∆pH gradient. While S. baltica OS155 showed the highest tellurite resistance, S. putrefaciens was the most efficient in reducing tellurite. Moreover, pH-dependent tellurite transformation was associated with tellurium precipitation as tellurium dioxide. In summary, this work highlights the high tellurite reduction/detoxification ability exhibited by a number of Shewanella species, which could represent the starting point to develop friendly methods for the recovery of elemental tellurium (or tellurium dioxide).


Subject(s)
Biodegradation, Environmental , Inactivation, Metabolic/physiology , Shewanella/metabolism , Tellurium/metabolism , Electron Transport , Oxidation-Reduction
4.
Rev. chil. obstet. ginecol. (En línea) ; Rev. chil. obstet. ginecol;82(2): 96-99, abr. 2017. ilus, tab
Article in Spanish | LILACS | ID: biblio-899886

ABSTRACT

Antecedentes: La Incontinencia Urinaria de Esfuerzo (IOE) representa el 50% de las incontinencias urinarias en la mujer, produciendo un gran impacto en su calidad de vida. Actualmente el TOT es una de las técnicas quirúrgicas más utilizadas para su tratamiento. Objetivos: Determinar la tasa de éxito objetiva y subjetiva de las pacientes operadas por IOE e incontinencia de orina mixta (IOM) mediante TOT, y determinar la tasa de complicaciones perioperatorias. Métodos: Se realizó un estudio retrospectivo de cohorte de 8 años de seguimiento, en el que se evaluó mediante anamnesis, examen físico y protocolos quirúrgicos la tasa de éxito objetivo y subjetivo del TOT. Resultados: La tasa de éxito objetivo y subjetivo fue 92% y 76% respectivamente. El 8,3% de las pacientes presentó alguna complicación y la tasa de exposición de malla fue de 1,2%. Conclusiones: El TOT es una excelente alternativa para el tratamiento de la IOE en el Hospital de Quilpué.


Background: Stress Urinary Incontinence (SUI) represents 50% of urinary incontinence among women, causing a considerable impact on quality of life. Currently, the Mid-urethral slings such as the TOT are among the most common surgical technique for the treatment SUI. Objectives: The purpose of this study is to determine objective and subjective success rate in female patients with SUI and mixed urinary incontinence (MUI) treated with a transobturator mid urethral sling and to determine perioperative complications rate. Methods: We performed a retrospective cohort study of patients' records analyzing patients clinical history, physical examination and surgical records to evaluate the rate of objective and subjective success from TOT was performed. Results: objective and success rate was 92% and 76% respectively. The complications rate was 8,3% and mesh exposure was 1.2 %. Conclusions: TOT is an excellent alternative for the treatment of SUI in Quilpue's Hospital.


Subject(s)
Humans , Female , Adult , Middle Aged , Urologic Surgical Procedures , Urinary Incontinence, Stress/surgery , Postoperative Complications , Surgical Mesh , Chile , Retrospective Studies
5.
Med. interna (Caracas) ; 32(2): 124-128, 2016. ilus
Article in Spanish | LIVECS, LILACS | ID: biblio-1009548

ABSTRACT

El Síndrome Antifosfolípido (SAF) es una enfermedad auto-inmune que puede afectar vasos sanguíneos en todos los segmentos vasculares generando manifestaciones, incluyendo oculares, relacionadas con hipercoagulabilidad. La forma más frecuente de presentación ocular es trombosis retiniana, cuyos mecanismos desencadenantes aún no están totalmente claros. Los niveles elevados de anticuerpos antifosfolípidos (aPL) son el mecanismo principal de la trombosis en este síndrome. La incidencia de manifestaciones oculares está entre 14-18%, y por eso requiere gran atención en el abordaje de pacientes con SAF primario o secundario. Se presenta caso de paciente femenino de 32 años de edad con diagnóstico de SAF primario en tratamiento, refiere inicio de enfermedad actual en febrero 2016 cuando presenta rash eritematoso en cara, cuello y región superior del tórax, concomitante artralgias generalizadas; se asocia fiebre cuantificada en 39°C y evacuaciones líquidas por lo cual acude e ingresa al Hospital Universitario de Caracas. Durante la hospitalización, refiere escotomas y súbitamente pérdida de visión en ojo derecho, por lo que se realiza examen físico ocular, campimetría y fondo de ojo, los cuales resultan anormales. Este caso es presentado con el fin de realizar abordaje diagnóstico y terapéutico de acuerdo a lo reportado en la literatura(AU)


Antiphospholipid Syndrome (APS) is an autoimmune disease that can affect a wide range of blood vessels presenting clinical features, including ophtalmologic, linked to hypercoagulability. A retinal thrombosis is the commonest presentation in the ocular spectrum but the whose trigger mechanisms are not yet clear. A high level of antiphospholipid antibodies is the main mechanism proposed to explain thrombosis in this syndrome. The accumulated incidence of ocular manifestations range from 14-18%, which makes the ophthalmologic evaluation of great importance when assessing patients with either primary or secondary APS. We present the case of a 32 year-old feminine patient with previous APS diagnosis, who consulted for a rash in face, neck and chest, plus universal arthralgies, fever and liquid stools. During her hospitalization, she refered sudden visual loss of her right eye; the medical team made a complete physical evaluation, visual field test and funduscopy were done and the results were abnormal(AU)


Subject(s)
Humans , Female , Adult , Retinal Vein Occlusion/etiology , Antiphospholipid Syndrome/complications , Antiphospholipid Syndrome/physiopathology , Blindness , Immune System Diseases , Internal Medicine
6.
Rev. chil. obstet. ginecol ; 80(3): 215-220, jun. 2015. ilus
Article in Spanish | LILACS | ID: lil-752870

ABSTRACT

INTRODUCCIÓN: La colposacropexia por vía abdominal abierta (CSPA) es el gold standard para el tratamiento del prolapso de la cúpula vaginal (PCV). OBJETIVO: Mostrar nuestra experiencia, en un Hospital de mediana complejidad, en los primeros siete casos sometidos a un CSPA, reportando las complicaciones intra y post operatorias. MÉTODO: Se realizó un estudio prospectivo descriptivo en nuestras siete primeras pacientes portadoras de un prolapso de cúpula vaginal estadio III o IV (POP-Q) sintomáticas, sin incontinencia urinaria y sometidas a una CSPA, con una malla mixta en el Servicio de Obstetricia y Ginecología del Hospital de Quilpué. RESULTADOS: Se reclutaron 7 pacientes. Ninguna de ellas presentaba complicaciones con riesgo vital peri-operatorio, en un período de seguimiento de 33 meses. En el 100% de las pacientes se logró cura objetiva definida como un POP-Q estadio 0 o I, y buena calidad de vida según el Cuestionario de Impacto del Piso Pélvico (PFIQ-7, versión validada en español). Durante el seguimiento, sólo una paciente presentó exposición asintomática de 5 mm de la malla, resuelta con su resección por vía vaginal. Ninguna paciente requirió de una cirugía por prolapso de órganos pélvicos después de la CSPA. CONCLUSIÓN: Los resultados obtenidos concuerdan con la literatura. La CSPA sigue siendo el gold standard para el tratamiento del PCV, no siendo superada por el momento, por ninguna otra técnica, incluso la colposacropexia laparoscópica. Estimamos que el uso de mallas parcialmente reabsorbibles pueden disminuir la exposición de mallas, sin embargo se requieren de más estudios.


INTRODUCTION: The abdominal sacral-colpopexy is currently considered the gold standard for the management of (CSPA) vaginal vault prolapse (PCV). OBJECTIVE: To report our surgical experience at a county hospital with our first seven abdominal sacral-colpopexy cases. Reporting intra and post-operative complications. METHODS: We conducted a prospective descriptive study involving our first seven cases of patients with symptomatic vaginal vault prolapse stage III or IV (POP-Q) without urinary incontinence. All patients were undergoing CSPA with a partially absorbable mesh in the Obstetrics and Gynecology Department at the Quilpué Hospital. RESULTS: Seven patients were recruited. None of them presented a life threatening complication during a mean follow up period of 33 months. A hundred percent of patients achieved objetive cure defined as POP-Q stage 0 or I and subjective cure defined as a significant improvement in a validated questionnaire (PFIQ-7 spanish version). During patients follow up, only one patient had an asymptomatic 5 mm mesh exposure, resolved with a vaginal resection. None of the patients required surgery for pelvic organ prolapse after the CSPA. CONCLUSION: These results are in agreement with the international literature. The CSPA continues to be the gold standard for the PCV treatment of vaginal vault prolapse and has not been surpassed by either vaginal technique or the laparoscopic sacral-colpopexy. We believe that the use of partially reabsorbable meshes can decrease the rate of mesh exposure, however further studies are required.


Subject(s)
Humans , Female , Middle Aged , Surgical Mesh , Colposcopy/methods , Pelvic Organ Prolapse/surgery , Polypropylenes , Quality of Life , Sacrum/surgery , Vagina , Prospective Studies , Surveys and Questionnaires , Treatment Outcome , Colpotomy , Abdomen/surgery
7.
Nat Prod Commun ; 8(12): 1697-700, 2013 Dec.
Article in English | MEDLINE | ID: mdl-24555275

ABSTRACT

Quillaja saponaria (Quillay), an evergreen tree found in Chile, is one of the main sources of saponins. Quillaja saponins have hypocholesterolaemic, anticarcinogenic, antioxidant and pesticidal properties, and are used as adjuvants for vaccines. Samples of Quillay growing at three zones in O'Higgins Region, Chile (Coastal, Central and Mountain zones) were analyzed for content of saponins and physiological status. The results revealed differences in the content of saponins depending on the zone of sample collection. The highest contents were found in samples from the Mountain zone, where the highest saponin contents were accompanied by the lowest foliar nitrogen contents, the highest antioxidant activity and the highest carotenoid contents. The results suggest a physiological and adaptive mechanism of saponins in plants to survive under unfavourable environmental conditions. The results have important implications for a theoretical basis for the design of a reasonable harvest, to avoid the cost of poor quality material, and also to provide a sustainable use and conservation of this important species. Further research on the effects of stress will improve our understanding of the saponins production and their physiological functions in plants, whereas they have generally been studied for their biological and chemical applications.


Subject(s)
Ecosystem , Quillaja/chemistry , Saponins/isolation & purification , Antioxidants/analysis , Plants, Medicinal/chemistry , Plants, Medicinal/physiology , Quillaja/physiology
8.
Rev. chil. obstet. ginecol ; 77(3): 211-215, 2012. ilus
Article in Spanish | LILACS | ID: lil-646995

ABSTRACT

Antecedentes: La Incontinencia Urinaria de Esfuerzo (IUE) es una patología frecuente y en ascenso entre las mujeres, produce un deterioro significativo en la calidad de vida de ellas. Objetivos: Evaluar los resultados en el tratamiento de la IUE mediante un TOT ambulatorio con ajuste intraoperatorio de la tensión de la malla. Método: Se realizó un estudio prospectivo, descriptivo en el que se evaluaron los resultados objetivos y subjetivos en el tratamiento de la IUE con TOT ambulatorio, con ajuste intraoperatorio de la tensión de la malla. Resultados: Se obtuvo continencia normal en el 93,3 por ciento de las pacientes, 87 por ciento se consideró "sana". No se presentaron complicaciones mayores ni sobrecorrección a los 24 meses de seguimiento. El 93 por ciento de las pacientes abandonó el hospital el mismo día de la cirugía. Conclusiones: El ajuste de la malla intrao-peratorio permitiría mejorar los resultados publicados de continencia en la cirugía de TOT ambulatorio, disminuyendo el riesgo de sobrecorrección de la IUE en forma segura y rápida. Consideramos que debiera ser un paso obligatorio en el TOT.


Background: Stress urinary incontinence (SUI) is a common condition and rising among women, with a significant deterioration of quality of life. Objectives: To evaluate the results in the treatment of SUI by ambulatory TOT with intraoperative adjustment of mesh tension. Methods: We performed a prospective descriptive study that evaluated the objective and subjective outcomes of the SUI treatment with ambulatory TOT intraoperative adjustment of mesh tension. Results: Normal continence was obtained 93.3 percent of patients, 87 percent were considered cured. There were no major complications or over correction at 24 months follow up. 93.3 percent were discharged on the day of surgery. Conclusions: The intraoperative adjustment of the mesh would improve continence results published in TOT outpatient surgery, reducing the risk of overcorrection of SUI safely and quickly. We believe it should be a mandatory step in the TOT.


Subject(s)
Humans , Female , Adult , Middle Aged , Suburethral Slings , Urinary Incontinence, Stress/surgery , Ambulatory Care , Prospective Studies , Follow-Up Studies , Treatment Outcome , Patient Satisfaction
9.
Infect Genet Evol ; 11(8): 2011-9, 2011 Dec.
Article in English | MEDLINE | ID: mdl-21964598

ABSTRACT

Dengue virus currently causes 50-100 million infections annually. Comprehensive knowledge about the evolution of Dengue in response to selection pressure is currently unavailable, but would greatly enhance vaccine design efforts. In the current study, we sequenced 187 new dengue virus serotype 3 (DENV-3) genotype III whole genomes isolated from Asia and the Americas. We analyzed them together with previously-sequenced isolates to gain a more detailed understanding of the evolutionary adaptations existing in this prevalent American serotype. In order to analyze the phylogenetic dynamics of DENV-3 during outbreak periods; we incorporated datasets of 48 and 11 sequences spanning two major outbreaks in Venezuela during 2001 and 2007-2008, respectively. Our phylogenetic analysis of newly sequenced viruses shows that subsets of genomes cluster primarily by geographic location, and secondarily by time of virus isolation. DENV-3 genotype III sequences from Asia are significantly divergent from those from the Americas due to their geographical separation and subsequent speciation. We measured amino acid variation for the E protein by calculating the Shannon entropy at each position between Asian and American genomes. We found a cluster of seven amino acid substitutions having high variability within E protein domain III, which has previously been implicated in serotype-specific neutralization escape mutants. No novel mutations were found in the E protein of sequences isolated during either Venezuelan outbreak. Shannon entropy analysis of the NS5 polymerase mature protein revealed that a G374E mutation, in a region that contributes to interferon resistance in other flaviviruses by interfering with JAK-STAT signaling was present in both the Asian and American sequences from the 2007-2008 Venezuelan outbreak, but was absent in the sequences from the 2001 Venezuelan outbreak. In addition to E, several NS5 amino acid changes were unique to the 2007-2008 epidemic in Venezuela and may give additional insight into the adaptive response of DENV-3 at the population level.


Subject(s)
Dengue Virus/classification , Dengue Virus/genetics , Dengue/epidemiology , Dengue/virology , Genome, Viral , Mutation , Americas/epidemiology , Amino Acid Substitution , Animals , Base Sequence , Bayes Theorem , Dengue/genetics , Evolution, Molecular , Genotype , Humans , Molecular Sequence Data , Phylogeny , Serotyping , Venezuela/epidemiology
10.
Rev. chil. obstet. ginecol ; 76(4): 244-247, 2011. tab
Article in Spanish | LILACS | ID: lil-603033

ABSTRACT

Antecedentes: La esterilización tubaria transvaginal, es una forma de abordar la esterilización quirúrgica, en la actualidad poco popularizada. Objetivo: Evaluar la colpotomía posterior como vía para la esterilización tubaria. Método: Análisis de 100 fichas clínicas de mujeres multíparas en estado no puerperal, a solicitud voluntaria de esterilización. Resultados: Hubo un 3 por ciento de complicaciones. Conversiones en el 4 por ciento y un tiempo operatorio promedio de 25,2 minutos. Conclusión: La colpotomía posterior es una buena alternativa quirúrgica para efectuar la esterilización tubaria, con baja morbilidad.


Background: Transvaginal tubal sterilization is a way for surgical sterilization, that currently is not widely used. Objective: To evaluate the posterior colpotomy as a pathway for tubal sterilization. Method: Analysis of 100 medical records of multiparous women non puerperal state, who request voluntary sterilization. Results: There were 3 percent of complications, 4 percent of conversions and a mean operative time of 25.2 minutes. Conclusion: The posterior colpotomy is a good surgical alternative to perform tubal sterilization with low morbidity and cost.


Subject(s)
Humans , Female , Adult , Middle Aged , Colpotomy/methods , Sterilization, Tubal/methods , Vagina , Comorbidity , Postoperative Complications , Sterilization, Tubal/economics , Retrospective Studies , Parity , Body Mass Index
11.
Drugs Today (Barc) ; 44 Suppl 4: 7-21, 2008 Nov.
Article in Spanish | MEDLINE | ID: mdl-19536370

ABSTRACT

Infections caused by Candida spp. and Aspergillus spp. account for 90% of all fungal infections and are the most significant causes of human morbidity and mortality. Candida albicans causes between 50 and 60% of all nosocomial fungal infections. The wet mount test and culture are the screening methods used in leading clinical laboratories for the detection of Candida spp. However, yeasts should be strictly classified mainly based on their physiological and biochemical characteristics, through a series of morphological and biochemical laboratory tests. As a result of the increase in systemic fungal infections and the spread of antifungal medications, it was necessary to establish standardized in vitro sensitivity tests as a guideline for the therapeutic decision-making process. Among antifungal agents available today we find antimycotics such as amphotericin B, 5-fluorocytosine (5-FC), fluconazole, voriconazole, posaconazole, and ravuconazole. Additionally, there is the recently developed group of echinocandines, which includes caspofungin, micafungin and anidulafungine.


Subject(s)
Antifungal Agents/therapeutic use , Mycoses/drug therapy , Aspergillosis/drug therapy , Aspergillosis/microbiology , Candida/drug effects , Candida/growth & development , Candida/physiology , Candidiasis/drug therapy , Candidiasis/microbiology , Child , Humans , Microbial Sensitivity Tests , Mycoses/microbiology
12.
Rev Neurol ; 41(6): 331-7, 2005.
Article in Spanish | MEDLINE | ID: mdl-16163653

ABSTRACT

INTRODUCTION: Epileptic seizures account for 30-40% of the visits to our department. A retrospective study was conducted in an attempt to classify epileptic syndromes and seizures according to the classification developed by the International League Against Epilepsy (ILAE). AIMS: The aim of this study was to verify the applicability of the ILAE's international classification in our population and to analyse the quality of the information contained in the clinical records, thus confirming the importance of having a standardised clinical record. PATIENTS AND METHODS: The clinical records of 352 children aged between 0 and 14 years, between 2000 and 2001, were analysed. The eligibility criterion was determined by the reason for visiting: epilepsy or seizures with an epileptic mechanism. Data was collected according to a protocol that was drawn up for this purpose. RESULTS: Of the 352 cases, 21.3% had febrile seizures; 13.6% had a single seizure; 4.5% had neonatal convulsions; 54.5% were cases of epilepsy and 6% could not be analysed due to a shortage of data. In all, 192 clinical records that satisfied the definition of epilepsy were analysed. Partial epilepsies accounted for 55%, 23% were symptomatic and 2% were cryptogenetic. It was found that 10% of the generalised epilepsies were idiopathic. CONCLUSIONS: Despite the shortcomings in the documentation, the international classification was applicable to our population, as has been the case in other centres. Nevertheless, we came up against some problems, and therefore include some of the more notable points from the current discussion about classifications. We highlight the need to establish a standardised clinical record and to use computer systems to record epileptic patients. Although there were certain limitations, 81.3% of the epilepsies were classified and we therefore give some consideration to the new proposals for classification.


Subject(s)
Association , Epilepsy/classification , Medical Records/standards , Adolescent , Child , Child, Preschool , Epilepsy/physiopathology , Humans , Infant , Retrospective Studies , Uruguay
13.
Med Biol Eng Comput ; 39(3): 391-6, 2001 May.
Article in English | MEDLINE | ID: mdl-11465896

ABSTRACT

The mitotic index (MI) is an important measure in cell proliferation studies. Determination of the MI is usually made by light-microscope analysis of slide preparations. The analyst identifies and counts thousands of cells and reports the percentage of mitotic shapes found among the interphase nuclei. Full automation of this process is an ambitious task, because there can exist very few mitotic shapes among hundreds of nuclei and thousands of artifacts, resulting in a high probability of false positives, i.e. objects erroneously identified as mitosis or nuclei. A semi-automated approach for MI calculation is reported, based on the development of a neural network (NN) for automatic identification of metaphase spreads and stimulated nuclei in digital images of microscope preparations at 10X magnification. After segmentation of the objects on each image, ten different morphometrical, photometrical and textural features are measured on each segmented object. An NN is used to classify the feature vectors into three classes: metaphases, nuclei and artifacts. The system has been able to classify correctly approximately 91% of the objects in each class, in a test set of 191 mitosis, 331 nuclei and 387 artifacts, obtained from 30 different microscope slides. Manual editing of false positives from the metaphase classification results allows the calculation of the MI with an error of 6.5%.


Subject(s)
Image Processing, Computer-Assisted/methods , Metaphase , Neural Networks, Computer , Humans , Mitotic Index
14.
Toxicol Ind Health ; 13(4): 519-26, 1997.
Article in English | MEDLINE | ID: mdl-9249932

ABSTRACT

Several species of pathogenic Acanthamoeba cause infections to humans, but amoebic keratitis is more frequently found than any other due to the increasing number of contact lens wearers in the world. Cysts and trophozoites of these amebas are airborne and may pollute water from the air. We investigated the proportion of pathogenic Acanthamoeba from the atmosphere of the city of San Luis Potosi. Samples were taken by the impinger method, every month during one year. We isolated 23 strains of Acanthamoeba, 61% of them were non-pathogenic, 31% were non-pathogenic with invasive capacity and 8% were pathogenic to mice. Almost 40% of these strains represent danger of infections to humans. The isolations were more abundant during the dry season in the south (urban) and west (suburban) stations, which means that the sanitary conditions around stands may enhance the proportion of pathogenic strains in the surroundings.


Subject(s)
Acanthamoeba/isolation & purification , Air Pollutants , Acanthamoeba/pathogenicity , Animals , Humans , Mexico/epidemiology , Mice , Prevalence , Suburban Health , Urban Health
15.
P R Health Sci J ; 15(4): 257-60, 1996 Dec.
Article in English | MEDLINE | ID: mdl-9097342

ABSTRACT

OBJECTIVE: To compare mortality of wasting syndrome (WS) versus Pneumocystis carinii pneumonia (PCP) in AIDS patients reported in Puerto Rico after controlling for gender, age, and CD4 levels. METHODS: AIDS patients for which a diagnosis of WS (n = 1,180) or PCP (n = 765), who were reported to the AIDS Surveillance System of Puerto Rico between 1989 and 1992, were used to analyze the mortality risk among these diagnoses using a Cox's proportional hazard regression model. RESULTS: Cox model showed that WS patients had a 14% to 33% reduction in mortality risk compared with PCP patients after adjusting for gender and age (95% confidence level). Mortality risks for males were 18% (95% CI: 1%, 39%) higher than females risk after adjusting for AIDS defining condition and age. It was shown that a decrease in 100 CD4 cells increased the mortality by 37% (95% CI: 16%, 62%) after adjusting for AIDS defining conditions, gender, and age.


Subject(s)
Acquired Immunodeficiency Syndrome/mortality , HIV Wasting Syndrome/mortality , Pneumonia, Pneumocystis/mortality , Acquired Immunodeficiency Syndrome/immunology , Adult , Age Factors , Aged , CD4 Lymphocyte Count , Confidence Intervals , Female , HIV Wasting Syndrome/immunology , Humans , Male , Middle Aged , Pneumonia, Pneumocystis/immunology , Proportional Hazards Models , Puerto Rico/epidemiology , Sex Factors
17.
P. R. health sci. j ; P. R. health sci. j;15(4): 257-60, dec. 1996. tab
Article in English | LILACS | ID: lil-212515

ABSTRACT

OBJECTIVE: To compare mortality of wasting syndrome (WS) versus Pneumocystis carinii pneumonia (PCP) in AIDS patients reported in Puerto Rico after controlling for gender, age, and CD4 levels. METHODS: AIDS patients for which a diagnosis of WS (n = 1,180) or PCP (n = 765), who were reported to the AIDS Surveillance System of Puerto Rico between 1989 and 1992, were used to analyze the mortality risk among these diagnoses using a Cox's proportional hazard regression model. RESULTS: Cox model showed that WS patients had a 14 per cent to 33 per cent reduction in mortality risk compared with PCP patients after adjusting for gender and age (95 per cent confidence level). Mortality risks for males were 18 per cent (95 per cent CI: 1 per cent, 39 per cent) higher than females risk after adjusting for AIDS defining condition and age. It was shown that a decrease in 100 CD4 cells increased the mortality by 37 per cent (95 per cent CI: 16 per cent, 62 per cent) after adjusting for AIDS defining conditions, gender, and age.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Pneumonia, Pneumocystis/mortality , HIV Wasting Syndrome/mortality , Acquired Immunodeficiency Syndrome/mortality , Age Factors , Confidence Intervals , Pneumonia, Pneumocystis/immunology , Proportional Hazards Models , Puerto Rico , Sex Factors , HIV Wasting Syndrome/immunology , Acquired Immunodeficiency Syndrome/immunology
18.
Rev Esp Enferm Dig ; 88(1): 53-5, 1996 Jan.
Article in Spanish | MEDLINE | ID: mdl-8616004

ABSTRACT

We report the case of a 48 year-old woman with an epigastric palpable mass identified by abdominal echography and computed tomography as a solid pancreatic tumor. A cytology taken by fine needle aspiration guided by computed tomography was diagnostic of papillary pancreatic tumor, which was confirmed by surgical resection. We emphasize the low frequency and good prognosis of this type of tumor after surgical resection, and the utility of image techniques and fine needle aspiration to obtain a preoperative diagnosis.


Subject(s)
Cystadenoma, Papillary/pathology , Pancreatic Neoplasms/pathology , Biopsy, Needle , Cystadenoma, Papillary/surgery , Female , Humans , Middle Aged , Pancreas/pathology , Pancreatic Neoplasms/surgery , Pancreaticoduodenectomy , Tomography, X-Ray Computed
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