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1.
Clin. biomed. res ; 39(4): 341-345, 2019.
Article in Portuguese | LILACS | ID: biblio-1087506

ABSTRACT

O gênero Candida possui várias espécies conhecidas e que podem tornar-se patogênicas em determinadas situações. Candida blankii é uma espécie emergente que, na última década, foi identificada como um agente de doenças sistêmicas. Ainda não existe um protocolo de tratamento específico, apesar de que n os poucos casos registrados na literatura a terapia adotada foi efetiva. O objetivo deste estudo foi realizar uma revisão bibliográfica para coletar informações relevantes sobre este patógeno como um possível agente etiológico em infecções sistêmicas, bem como sua epidemiologia e os aspectos de sua patogenicidade. (AU)


The genus Candida has several known species and may become pathogenic in certain situations. Candida blankii is an emerging species that in the past decade has been identified as an agent of systemic diseases. There is no specific treatment protocol yet, although in the few cases reported in the literature the therapy adopted was effective. The objective of this study was to conduct a literature review to collect relevant information about this pathogen as a possible etiological agent in systemic infections, as well as its epidemiology and aspects of pathogenicity. (AU)


Subject(s)
Humans , Candida/classification , Candida/drug effects , Candida/pathogenicity , Communicable Diseases, Emerging/genetics , Drug Resistance, Fungal/genetics , Disease Susceptibility/epidemiology
2.
Salud pública Méx ; 59(supl.1): 30-39, 2017. tab, graf
Article in Spanish | LILACS | ID: biblio-846092

ABSTRACT

Resumen: Objetivo: Identificar elementos asociados con el tabaquismo, la susceptibilidad y la adicción en jóvenes de 13 a 15 años, para determinar condiciones de riesgo y posibles intervenciones desde las políticas sobre tabaco en Costa Rica. Material y métodos: Se utilizó información de las cuatro rondas de la Global Youth Tobacco Survey (GYTS) Costa Rica, con un tamaño muestral de 11 540 jóvenes colegiales. Se estimaron indicadores de interés y modelos de regresión logística para el consumo de tabaco, la susceptibilidad y la adicción. Resultados: La prevalencia de consumo actual disminuyó significativamente a lo largo de los 14 años del estudio (17.3% en 1999 y 5.0% en 2013) y también, aunque en menor intensidad, en el índice de susceptibilidad hacia el fumado (19.3% en 1999 y 12.4% en 2013). La proporción de jóvenes que presentan adicción ha mostrado un aumento importante en el mismo periodo. Conclusiones: Las condiciones que han favorecido la importante reducción en la prevalencia de consumo, y en menor medida de la susceptibilidad, deben mantenerse y profundizarse para lograr el cumplimiento pleno de las medidas del programa MPower.


Abstract: Objective: To identify factors associated with susceptibility, tobacco use and addiction in young people from 13 to 15 years of age, to determine conditions of risk and identify possible correlates to the development of public policies on smoking in Costa Rica. Materials and methods: Information available from the four rounds of the Global Youth Tobacco Survey (GYTS) Costa Rica was used. It was based on a sample size of 11 540 youngsters from public and private schools. Indicators of interest and logistic regression models for smoking, susceptibility and addiction were estimated. Results: The prevalence of current consumption shows a significant decrease over the 14 years of the study (17.3% in 1999 and 5.0% in 2013) and, to a lesser intensity, in the index of smoking susceptibility (19.3% in 1999 and 12.4% in 2013). The proportion of young people with addiction has shown a significant increase in the same period. Conclusions: The conditions that explained the significant reduction in smoking prevalence and less susceptibility must be maintained and deepened to achieve full compliance of the MPower measures.


Subject(s)
Humans , Male , Female , Adolescent , Tobacco Use Disorder/epidemiology , Smoking/epidemiology , Risk Factors , Costa Rica/epidemiology , Disease Susceptibility/epidemiology
3.
Salvador; s.n; 2014. 155 p. ilus.
Thesis in Portuguese | LILACS | ID: biblio-1000954

ABSTRACT

A infecção pelo Trypanosoma cruzi determina uma resposta imunológica inata do hospedeiro vertebrado, decorrente da multiplicação parasitaria em macrófagos e a produção de Interferon gama (IFNy) pelas células T ativadas, além de estimulação policlonal de células do baço, com imunossupressão. Por outro lado tem sido demonstrado que o tratamento com quimioterápico Benzonidazol em camundongos infectados, além de determinar uma destruição dos parasitos, tem também uma ação sobre o sistema imunológico em camundongos infectados com cepas do T. cruzi com diferentes graus de suscetibilidade ao Benzonidazol, como a cepa Y (suscetível ao quimioterápico) e a cepa Colombiana (resistente). No presente estudo procura-se investigar a influência do tratamento com o Benzonidazol sobre a resposta imunológica em camundongos infectados com cepa suscetível (Cepa Y) ou resistente (Colombiana). Foram utilizados 320 camundongos, subdivididos em grupos experimentais: Infectados tratados cepa Y (YT) e não tratados (Y-NT); Colombiana tratados (COL-T) e não tratados (COL-NT), Tratados não infectados (TNI) e Controles sem tratamento (CI). O inóculo foi de 1,0 x 104 por via intraperitoneal. O tratamento foi iniciado no pico parasitêmico de cada cepa, sendo no 7º dia após a infecção nos animais infectados pela cepa Y e, nos tratados e não infectados, no 18º dia de infecção na cepa Colombiana. A quimioterapia foi realizada em 60 doses (100mg/kg/dia de Benzonidazol-Benz). Os camundongos sacrificados na fase aguda e na fase crônica em todos os grupos tiveram as secções de coração e músculo esquelético coletadas, fixadas e processadas para o estudo histopatológico em secções coradas pela Hematoxilina & Eosina e Picro-Sirius. Investigou-se a resposta humoral pela sorologia (Imunofluorescência indireta) e pela reação de Elisa. A resposta celular pela proliferação celular do baço, e pela avaliação quantitativa das subpopulações celulares no baço de CD4+, CD8+...


Infection with T. cruzi determines an immunological response in the vertebrate host, wit h parasites multiplication in macrophages, with production of TNFα by these cells an IFNγ, by stimulated T. cells: a polyclonal multiplication of spleen cells is present, with immunossuppression. Treatment of infected mice with BENZ showed that this chemotherapy determines parasitic destruction and also stimulates the immunological system in mice infected either with the Y or the Colombian strain which differs in the susceptibility to chemotherapy with BENZ. In the present study we intend to investigate the influence of treatment with BENZ on the immunological response in mice infected either with the Y strain (susceptible) or the Colombian strain (resistant). This study was performed by comparing the results obtained with the groups of mice not infected and treated, and infected controls, not treated. Material and methods : Number of animals: 320, sub-divided in the experimental groups:Ystrain infected and treated with BENZ(YT) or not-treated (YNT); Colombian treated (COL-T) and not-treated (COL-NT); treated not infected (TNI); Control not treated (COL-NT). Inoculum : 1x104 trypomastigotes, (blood forms) injected intraperitoneally. Treatment was initiated in the peak of parasitemia for each strain:7th day for the Y strain and in the 18th day in the infection with the Colombian strain. Chemotherapy was performed in 60 doses (100mg x kg x day) of BENZ. Mice were killed in the acute and chronic phases post infection; sections of the heart and skeletal muscles were collected, fixed and processed for histopathology, in sections stained with Hematoxylin and Eosin, and with Picro-Sirius staining, for collagen. The humoral response was evaluated by serological reactium of indirect immununofluorescence and ELISA reaction. Celular responses were evaluated by celular proliferation in the spleen of CD4+, CD8+...


Subject(s)
Animals , Disease Susceptibility/complications , Disease Susceptibility/diagnosis , Disease Susceptibility/epidemiology , Disease Susceptibility/mortality , Disease Susceptibility/parasitology , Disease Susceptibility/pathology , Trypanosoma cruzi/growth & development , Trypanosoma cruzi/immunology , Trypanosoma cruzi/parasitology
4.
Salud pública Méx ; 55(2): 170-178, mar.-abr. 2013. ilus, tab
Article in Spanish | LILACS | ID: lil-669723

ABSTRACT

OBJETIVO: Evaluar las condiciones de vulnerabilidad asociadas con la ocurrencia de dengue en dos localidades de Morelos en los años 2006 a 2009. MATERIAL Y MÉTODOS: se aplicó una encuesta sobre conocimientos, percepción de riesgo, prácticas de prevención y uso del agua en dos localidades de Morelos. Mediante un análisis de componentes principales, se construyó un índice de vulnerabilidad local al dengue (IVL). La asociación del IVL con la enfermedad en la vivienda se evaluó mediante una prueba de ji cuadrada. RESULTADOS: El IVL incluyó cinco componentes explicando el 63% de la varianza y fue clasificado en tres categorías: baja, media y alta. Se observó una asociación significativa entre el aumento de la vulnerabilidad y la prevalencia del reporte de casos de dengue en las localidades. CONCLUSIÓN: El estudio de la vulnerabilidad al dengue permite identificar necesidades locales específicas en materia de promoción de la salud.


OBJECTIVE: To evaluate the vulnerability associated with the occurrence of dengue in two villages of Morelos, Mexico from 2006 to 2009. MATERIALS AND METHODS. A survey on knowledge, risk perception, prevention practices and water use was applied in two villages of Morelos. Using a principal component analysis, an index of local vulnerability to dengue (IVL) was constructed. The association of IVL with the disease at home was assessed using a Chi-square test. RESULTS: The IVL included five components explaining 63% of the variance and was classified in three categories: low, medium and high. There was a significant association between increased vulnerability and prevalence of reported cases of dengue in Temixco and Tlaquiltenango. CONCLUSION: The study of vulnerability to dengue allows us to identify local needs in the field of health promotion.


Subject(s)
Female , Humans , Male , Dengue/epidemiology , Health Knowledge, Attitudes, Practice , Cross-Sectional Studies , Disease Susceptibility/epidemiology , Mexico , Risk Factors
5.
Rev. med. nucl. Alasbimn j ; 10(41)jul. 2008. tab, graf
Article in Spanish | LILACS | ID: lil-495999

ABSTRACT

Objetivo: Conocer la combinación de Factores Mayores de Riesgo Aterosclerótico (FMRA) que nos sugeriría remitir directamente al paciente a coronariografía, para la optimización del uso del SPECT de Perfusión Miocárdica (SPECTPM). Material y Método: Se analizaron 577 SPECTPM, 345(59.8 por ciento) fueron masculinos, edad media: 62.26años y 79pacientes(13.7 por ciento) fueron asintomáticos. Resultados: 448(77.64 por ciento) SPECTPM fueron positivos y 129(22.36 por ciento) negativos, el FMRA más frecuente la HTA (68.80 por ciento) y el que más se asocio con SPECTPM positivo el habito de fumar, no existió riesgo significativo de SPECTPM positivo para ninguno de los FMRA estudiados, ni sus combinaciones. Conclusiones: La presente investigación sugiere que teniendo en cuenta la alta especificidad, valor predictivo negativo y valor pronostico del SPECTPM, deben realizarse coronariografía solo a los pacientes sintomáticos con resultado positivo de SPECTPM, por tanto todos los pacientes deben realizarse un SPECTPM previo a la realización de la angiografía, por tener alta probabilidad de tener resultados negativos.


Objective: Know the combination of FMRA that would suggest us to remit the patient directly to coronariography, for the optimization of the use of the SPECTPM. Material and Method: 577 SPECTPM were analyzed, 345(59.8 percent) they were masculine, mean age: 62.26 years and 79(13.7 percent) asymptomatic. Results: Positive SPECTPM 448(77.64 percent) and negative 129(22.36 percent), the most frequent FMRA was HTA(68.80 percent) and the one that was most associated with positive SPECTPM was the smoking habit. There wasn’t any significant risk of positive SPECTPM for none of the FMRA studied, not even in their combinations. Conclusions: Keeping in mind the high specificity, predictive negative value and prognostic value of the SPECTPM, this investigation paper recommends that only patients with a positive result of SPECTPM should undergo a coronariography. Therefore, all patients with angina pectoris should have a SPECTPM before undergoing an angiography, because there is a high probability of having negative results.


Subject(s)
Humans , Male , Adult , Female , Middle Aged , Tomography, Emission-Computed, Single-Photon , Arteriosclerosis , Arteriosclerosis/etiology , Coronary Circulation , Arteriosclerosis/physiopathology , Chile/epidemiology , Diabetes Complications , Dyslipidemias/complications , Risk Factors , Hypertension/complications , Incidence , Obesity/complications , Prognosis , Radiopharmaceuticals , Sensitivity and Specificity , Disease Susceptibility , Disease Susceptibility/epidemiology , Tobacco Use Disorder/adverse effects , Severity of Illness Index
6.
Rev. salud pública ; 9(1): 117-128, ene.-mar. 2007. tab, graf
Article in Spanish | LILACS | ID: lil-450560

ABSTRACT

Objetivo: Se ilustra el análisis de la propagación del síndrome respiratorio agudo severo en Canadá en 2003, mediante modelos simples, comparando la influencia de las medidas de aislamiento en dos ondas epidémicas. Métodos: Se utilizan los modelos Susceptible-Infectado y Susceptible- Infectado-Removido en versión determinista para ambas ondas epidémicas, utilizando información oficial publicada. Se estiman los parámetros deterministas con el programa NLREG 6,2 y se obtienen soluciones analíticas con Maple 9. Se obtienen indicadores para el análisis de la dinámica de la epidemia. Resultados: Se observó un adecuado ajuste de los datos con ambos modelos pero en la segunda onda se observó un menor ajuste con el modelo sin remoción. En la segunda onda, con un R0 ligeramente menor a 1, a pesar de presentar la mayor incidencia (8,8 casos por día), se tuvo el más alto ritmo de infección (35 caso nuevos por 10 000 susceptibles) compensado con un alto ritmo de remoción (11,5 casos por día), lo que llevó a una menor duración de la epidemia (11,1 días) y una menor tasa de ataque (1 caso por cada cien susceptibles). Conclusiones: El modelo susceptible - infectado puede ser útil en la fase inicial de la epidemia, previo a la instauración de la remoción pero se requiere una vigilancia estrecha de la evolución de la epidemia para incorporar la modelación de la fuerza de remoción y derivar información que sustente las decisiones.


Objective: Severe acute respiratory syndrome propagation in Canada during 2003 is analysed by means of simple models, comparing the influence of isolation measures on two epidemic waves. Methods: Deterministic susceptible-infected and susceptible-infected-removed models were used for both epidemic waves, using official published information. NLREG 6.2 was used for estimating deterministic parameters and analytical solutions were obtained with Maple 9 software. Dynamical indicators were obtained for the epidemic. Results: Suitable adjustment of the data was observed with both models, but smaller adjustment was observed during the second wave with the non- removed model. The highest rate of infectiousness was shown (35 new cases per 10 000 susceptible people) during the second wave (with R0 near to one), in spite of presenting greater incidence (8.8 cases per day), compensated for by a high rate of removal (11,5 cases per day) which lasted less than the epidemic (11,1 days), and a lower rate of attack (1 case per each 100 susceptible people). Conclusions: The susceptible-infected model can be useful during an epidemic's initial phase (prior to removal); however, closer monitoring of an epidemic's development is required for modelling the strength of removal and deriving useful information for decision-making.


Subject(s)
Humans , Models, Theoretical , Severe Acute Respiratory Syndrome/epidemiology , Canada/epidemiology , Disease Susceptibility/epidemiology
7.
J. bras. patol. med. lab ; 43(1): 37-43, fev. 2007. tab
Article in Portuguese | LILACS | ID: lil-448533

ABSTRACT

Células glandulares atípicas (AGC) em esfregaços cervicovaginais são achados citológicos raros, porém de significado representativo. Sua incidência varia, na literatura, de 0,08 por cento a 0,81 por cento. O sistema Bethesda de 2001 classifica estas lesões glandulares como AGCs sem outras especificações, AGCs provavelmente neoplásicas, adenocarcinoma cervical in situ (AIS) e adenocarcinoma invasivo. Das mulheres portadoras de AGC, grande parte não apresentará qualquer tipo de alteração histológica em avaliação subseqüente. Entretanto, em 17,4 por cento a 62,2 por cento dos casos serão encontradas lesões histológicas significativas, como neoplasias intra-epiteliais cervicais, AIS, neoplasias escamosas e glandulares, cervicais e endometriais, bem como neoplasias de outras localizações. O risco de doença significativa está relacionado à subdivisão de AGC encontrada. Em virtude da elevada probabilidade de anormalidades histológicas significativas em casos de AGC, a simples repetição citológica é insuficiente para o seguimento dessa condição. Esta atualização descreve a epidemiologia, a avaliação e a conduta das pacientes portadoras dessa anormalidade citológica.


Atypical glandular cells (AGC) on cervical smears are unusual but important cytologic diagnosis. The incidence of AGC ranges from 0.08 percent to 0.81 percent of all cervical smears tests. The 2001 Bethesda System nomenclature classifies these glandular lesions as AGC not otherwise specified, AGC favor neoplasia, endocervical adenocarcinoma in situ (AIS) and invasive adenocarcinoma. Of women with AGC smears, a great number will have no histologic abnormalities on further evaluation. However, 17.4 percent to 62.2 percent are found to have significant histologic lesions such as cervical intraepithelial neoplasia, AIS, squamous and glandular cancers from sites farther the cervix and endometrium. The risk of significant disease is related to the AGC subclassification that was found. Because of the high likelihood that AGC is associated with significant histological disease, simply repeating the cytological smear is not sufficient for the management of this condition. This review describes the epidemiology, evaluation and management of patients with these citologic readings.


Subject(s)
Cytodiagnosis , Cells/cytology , Disease Susceptibility/epidemiology , Vaginal Smears
8.
Gac. méd. Méx ; 141(2): 115-122, mar.-abr. 2005. tab
Article in Spanish | LILACS | ID: lil-632065

ABSTRACT

La enfermedad arterial coronaria y la diabetes mellitus figuran entre las primeras causas de mortalidad y morbilidad en México. Factores genéticos juegan un papel fundamental en el desarrollo de estas entidades. A partir del reconocimiento y estudio de familias con formas monogénicas de diabetes y distintas dislipidemias asociadas al desarrollo de ateroesclerosis, se han identificado en los últimos años distintos genes y loci relacionados con estos padecimientos a través de estudios de mapeo genético. Estos estudios han evidenciado la heterogeneidad genética que existe en cuanto al tipo de genes involucrados en los distintos grupos étnicos. El estudio de familias mexicanas con diabetes de inicio temprano e hiperlipidemia familiar combinada mostró la participación de distintos loci génicos asociados a estas entidades en la población mexicana. Esto muestra la utilidad de las estrategias de mapeo para la identificación del componente genético de estas entidades en nuestra población.


Coronary artery disease and diabetes mellitus are among the primary mortality and morbidity causes in Mexico. Genetic factors play a fundamental role in the development of these entities. In the past few years due to the recognition and study of families with monogenic forms of diabetes and dislipidemias associated with development of atherosclerosis, several genes and loci have been associated with these conditions through genetic linkage studies. These studies have provided evidence of the genetic heterogeneity that exists and the type of genes involved in different ethnic groups. The study of Mexican families with early onset diabetes and combined familial hyperlipidemia showed the participation of different genetic loci associated with these conditions in the Mexican population. These findings show the value of gene mapping strategies in the identification of the genetic component in these entities in our population.


Subject(s)
Adolescent , Adult , Child , Female , Humans , Male , Cardiovascular Diseases/genetics , Diabetes Mellitus/genetics , Disease Susceptibility/epidemiology , Chromosome Mapping , Cardiovascular Diseases/epidemiology , Diabetes Mellitus/epidemiology , Family , Genetic Linkage , Mexico/epidemiology
9.
Gac. méd. Méx ; 140(4): 467-472, jul.-ago. 2004. tab
Article in Spanish | LILACS | ID: lil-632213

ABSTRACT

El concepto de causalidad es parte de la vida común, pues el hombre desde siempre ha buscado el porqué de las cosas, como una forma de entender y adaptarse al mundo. En medicina, uno de los objetivos centrales de estudio es la identificación de los factores o agentes que causan las enfermedades, con el propósito de establecer tratamientos y sobretodo, para aplicar mediadas preventivas. En este trabajo, realizamos una breve revisión de las posiciones filosóficas sobre la causalidad, los modelos biológicos de la misma, así como las herramientas utilizadas en epidemiología clínica para evaluar las asociaciones causales.


The concept of causality is apart of every day life because man has always searched for the why of things as a way of dealing with and adapting to the world. In medicine, one of the central aims of study is identification of the factors or agents that cause disease with the intention of establishing treatments and especially, to apply preventive strategies. In this work, we conducted a brief review of the philosophical positions on causality, its biological models, as well as the tools used in clinical epidemiology to evaluate causal associations.


Subject(s)
Humans , Causality , Disease Susceptibility/epidemiology , Models, Biological , Philosophy, Medical
10.
Parasitol. día ; 22(1/2): 23-8, ene.-jun. 1998. tab, graf
Article in Spanish | LILACS | ID: lil-258032

ABSTRACT

Se infectaron cuatro cepas de ratones, machos y hembras, con 2000 trypomastigotes sanguíneos de la cepa Tulahuen de trypanosoma cruzi. Los animales de las cepas A.Sw y HTI se comportaron como resistentes y los de las cepas A/Sn y HTG como susceptibles, independiente del sexo de los animales infectados. En los casos de las cepas A.Sw, HTG y HTI se observó niveles significativamente más altos de parasitemia en los machos. A nivel histopatológico el daño tisular no presenta inicialmente diferencias significativas entre cepas resistentes y susceptibles, sin embargo, con el tiempo se puede ver que en los animales resistentes se inducen fenómenos de reparación del daño, en cambio en los ratones susceptibles las lesiones parecen aumentar a pesar de no observarse parásitos intracelulares o circunlantes


Subject(s)
Animals , Mice , Chagas Disease/physiopathology , Trypanosoma cruzi/isolation & purification , Disease Susceptibility/epidemiology , Histocytochemistry/methods , Immunity, Innate , Mice/parasitology , Parasitemia/epidemiology
14.
Gac. méd. Méx ; 133(supl.1): 29-33, 1997.
Article in Spanish | LILACS | ID: lil-226974

ABSTRACT

Aunque la epidemiología tiene los mismos compromisos que en el pasado, en términos de orientación sobre la política sanitaria, los cambios de los patrones epidemiológicos le plantean nuevos desafíos. El desarrollo científico y tecnológico aporta nuevas herramientas para el mejor conocimiento de la conducta de las enfermedades en la población. Es el caso de la biología molecular que ofrece la opción de identificar factores de riesgo en individuos y poblaciones. Diversos países en desarrolló, incluido México, tiene sistemas de epidemiología satisfactorios y grupos de investigadores en biología molecular para contribuir al conocimiento epidemiológico. El International Molecular Epidemiology Task Force (IMETAF) es una red de colaboración para desarrollar infraestructura, apoyar proyectos y capacitar recursos. La Oganización Mundial de la Salud, la organización panamericana de la Salud y, consecuentemente, la representación de estos organismos en México contribuyen al mejor desarrollo de la tecnología moderna con relación al que hacer epidemiológico de los países


Subject(s)
Developing Countries , Disease Susceptibility/epidemiology , Disease Susceptibility/genetics , Epidemiology/organization & administration , Health Resources/supply & distribution , Research/organization & administration , Molecular Biology/organization & administration , Pan American Health Organization , Public Health , Mexico , Risk Factors
15.
Gac. méd. Méx ; 133(supl.1): 87-92, 1997. tab
Article in Spanish | LILACS | ID: lil-226984

ABSTRACT

La salud pública ha evolucionado como disciplina en paralelo a los avances tecnológicos y científicos de las disciplinas básicas. El campo de la biología molecular ha provisto a la salud pública con técnica de laboratorio más sofisticadas y herramientas diagnósticas más refinadas que permiten profundizar en el estudio de la historia natural de las enfermedades, identificar las poblaciones en riesgo, diagnósticar las patologías de manera más temprana y limitar el daño asociado a un diagnóstico tardío. El espacio de acción de las técnicas modernas de biología molecular se ubica en la detección y medición de las estructuras moleculares asociadas al proceso patológico, la identificación genotípica de agentes patógenos, el grado de exposición, el efecto sobre estructuras específicas y la susceptibilidad individual y poblacional. En este trabajo se describen sus aplicaciones y se señalan los límites y riesgos en su aplicación en el campo de la salud pública


Subject(s)
Humans , Male , Female , Blood Banks , Disease Susceptibility/epidemiology , Disease Susceptibility/genetics , Population Surveillance , Public Health/methods , Genetic Testing , Genetic Techniques/economics , Genetic Techniques , Diagnostic Tests, Routine , Risk , Technology, High-Cost
16.
Rev. méd. Chile ; 124(2): 178-88, feb. 1996. tab, graf
Article in Spanish | LILACS | ID: lil-173319

ABSTRACT

Meningococcal meningitis is subjected to epidemiological surveillance due to its severity and the occasional presentation of epidemic outbreaks. This work analyses previous disease models, generate new ones and analyses monthly cases using ARIMA time series models. The results show that disease dynamics for closed polpulation is epidemic and the epidemic size is related to the proportion of carriers and the transmissiveness of the agent. In open populations, disease dinamic depends on the admission rate of susceptible and the relate admission of infected individuals. Our model considers a logistic populational growth and carrier admission proportional to populational size, generating an endemic dynamics. Considering a non-instantaneous system response, a greater realism is obtained establishing that the endemic situation may present a dynamics highly sensitive to initial conditions, depending on the transmissiveness and proportion of susceptible individuals in the population. Time series model showed an adequate predictive capacity in terms no longer than 10 months. The lack of long term predictability was attributed to local changes in the proportion of carriers or on transmissiveness that lead to chaotic dynamics over a seasonal pattern. Predictions for 1995 and 1996 were obtained


Subject(s)
Humans , Time Series Studies , Meningitis, Meningococcal/epidemiology , Models, Theoretical , Carrier State/epidemiology , Disease Susceptibility/epidemiology , Models, Statistical , Forecasting/methods
17.
Southeast Asian J Trop Med Public Health ; 1994 Sep; 25(3): 569-74
Article in English | IMSEAR | ID: sea-33296

ABSTRACT

Current US military recruit vaccination policy presumes that recruits have had a complete childhood immunization series. This assumption may not be appropriate for recruits from Micronesia, who may have had limited access to modern health care, including immunization programs. During 1988 and 1990, a cross-sectional serosurvey was conducted among 66 US military recruits, 56 from the Federated States of Micronesia and 10 from the Republic of the Marshall Islands, collectively referred to as Micronesia. Antibody seronegativity levels for 12 vaccine-preventable (or potentially so) diseases were: measles (52%), mumps (14%), rubella (21%), varicella (38%), diphtheria (39%) tetanus (0%), polio type 1 (4%), polio type 2 (0%), polio type 3 (14%), hepatitis A (9%), hepatitis B (17%), and hepatitis C (98%). Compared with Army recruits in general, Micronesian recruits were significantly more likely to be seronegative for measles and varicella and seropositive for hepatitis types A and B. Personal histories of disease were felt to be inadequate in predicting antibody status.


Subject(s)
Adult , Age Factors , Antibodies/analysis , Communicable Disease Control , Cross-Sectional Studies , Disease Susceptibility/epidemiology , Female , Humans , Immunization Programs , Male , Micronesia/epidemiology , Military Medicine , Seroepidemiologic Studies , United States , Vaccination
19.
Bol. Asoc. Méd. P. R ; 83(4): 147-50, abr. 1991. tab
Article in English | LILACS | ID: lil-107887

ABSTRACT

Rubeola es una enfermedad viral autolimitada. Su más temida sequela es el síndrome de Rubeola Congenito. La llegada de la vacuna de rubeola la ha hecho posible la erradicación del Síndrome de Rubeola Congénito. Son necesarios los siguientes datos para determinar la amenaza de nuevos casos del Síndrome de Rubeola Congénito; la incidencia de rubeola, la incidencia del Síndrome de Rubeola Congénito y el porciento de la población inmune a rubeola. Estas estadísticas no estan disponibles en Puerto Rico. Este estudio fue diseñado para determinar el porciento de mujeres susceptibles a rubeola de dos clínicas de cuidado prenatal. Se hizo una correlación contra el historial dado por las pacientes y los resultados de las pruebas serológicas hechas para determinar la inmundad a rubeola. El porciento de mujeres suscetibles a rubeola en este aestudio es más alto que en estudios similares hechos en los Estados Unidos. La correlación entre los resultados de las pruebas serológicas y el historial dado por las pacientes fue muy pobre. Esto indica que todos los médicos primarios deben evaluar el status de inmunidad a rubeola de sus pacientes femeninas y/o vacunadas contra rubeola


Subject(s)
Prenatal Care , Rubella/immunology , Age Factors , Antibodies, Viral/blood , Disease Susceptibility/epidemiology , Disease Susceptibility/immunology , Prevalence , Puerto Rico/epidemiology , Rubella/congenital , Rubella/prevention & control , Rubella virus/immunology
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