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1.
Arch Soc Esp Oftalmol (Engl Ed) ; 99(9): 400-403, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38768850

RESUMO

In retinopathy of prematurity (ROP) type I, the use of intravitreal bevacizumab (IVB), which is an inhibitor of endothelial growth factor (VEGF), has become popular despite not being a therapy approved by regulatory agencies. However, IVB has shown positive effects in halting disease progression at lower costs compared to other anti-VEGF therapies (ranibizumab or aflibercept). In this report, we present the experience during the treatment with IVB of 102 Colombian children with ROP type I, with a success rate of 98% (100). Complications occurred in 3.9% (4). Finally, we conclude that a single dose of IVB is an effective therapy for the management of ROP type I, with a lower risk of complications and retreatment.


Assuntos
Inibidores da Angiogênese , Bevacizumab , Injeções Intravítreas , Retinopatia da Prematuridade , Humanos , Retinopatia da Prematuridade/tratamento farmacológico , Bevacizumab/uso terapêutico , Bevacizumab/administração & dosagem , Inibidores da Angiogênese/uso terapêutico , Inibidores da Angiogênese/administração & dosagem , Inibidores da Angiogênese/efeitos adversos , Recém-Nascido , Masculino , Feminino , Colômbia , Estudos Retrospectivos , Resultado do Tratamento , Fator A de Crescimento do Endotélio Vascular/antagonistas & inibidores
2.
Rev. enferm. neurol ; 22(1): 93-99, 04-09-2023. ilus
Artigo em Espanhol | LILACS, BDENF - Enfermagem | ID: biblio-1509852

RESUMO

Introducción: Se presenta un caso clínico de sistema de presión negativa como tratamiento de ventana torácica derecha, realizado en la clínica de heridas. Se describe el tiempo y proceso de cicatrización, desde la llegada del paciente hasta la cicatrización total. Caso: Hombre de 24 años, postoperado de toracotomía, se le colocó terapia de presión negativa inicial a -75mmHg con intensidad media y modalidad continua; se aplicó esponja blanca para proteger el pulmón expuesto y esponja de plata, con tres cambios cada siete días. Posteriormente, se realizaron diez cambios de esponjas cada cuatro días, identificando disminución de las dimensiones de la ventana torácica. En la semana once inició tratamiento con terapia húmeda y fibrina rica en plaquetas, la cual se colocó en el lecho de la herida, aplicándose una vez por semana durante un mes. A partir de la semana quince se realizó curación diaria con aplicación de sulfadiazina de plata. El paciente fue dado de alta en la semana veinte con la herida 100% epitelizada. Conclusiones: El uso de la terapia de presión negativa acelera el proceso de curación, reduce las complicaciones y la carga bacteriana del tejido, debido a que la esponja de plata actúa como barrera antimicrobiana.


Introduction: A clinical case of negative pressure system as a right thoracic window treatment, performed in the wound clinic, is presented. The time and healing process from patient arrival to complete healing is described. Case: A 24-year-old man, postoperative thoracotomy, was placed on negative pressure therapy at -75mmHg with medium intensity and continuous mode; white sponge was applied to protect the exposed lung and silver sponge, with three changes every seven days. Subsequently, ten sponge changes were performed every four days, identifying a decrease in the dimensions of the thoracic window. In week eleven, the patient started treatment with wet therapy and platelet-rich fibrin, which was placed in the wound bed and applied once a week for a month. From week fifteen onwards, daily healing was performed with silver sulfadiazine application. The patient was discharged at week twenty with the wound 100% epithelialized. Conclusions: The use of negative pressure therapy accelerates the healing process, reduces complications and tissue bacterial load, due to the silver sponge acting as an antimicrobial barrier.


Assuntos
Humanos , Masculino , Feminino , Adulto , Adulto Jovem , Tratamento de Ferimentos com Pressão Negativa , Terapêutica , Toracotomia , Técnicas de Fechamento de Ferimentos , Cuidados de Enfermagem
3.
Rev Neurol ; 76(8): 257-264, 2023 04 16.
Artigo em Espanhol | MEDLINE | ID: mdl-37046394

RESUMO

INTRODUCTION: People with epilepsy have multiple barriers to recovery: access to medication, comorbidities and social problems. The aim of this study is to determine psychosocial factors associated with the perception of quality of life in people with epilepsy in the department of Bolivar, Colombia, in the year 2022. SUBJECTS AND METHODS: Descriptive cross-sectional study, correlational, with a sample stratified with a margin of error of 5%, according to the calculation of the average number of people treated for epilepsy in Colombia. 174 people participated with a mean age of 39.55 years, 50% men and 50% women. An instrument was used that determined sociodemographic data, quality of life (Quality of Life in Epilepsy Inventory-10), adherence to treatment (Morisky test), self-care behaviors, perception of disability and provision of health services. All the instruments showed a Cronbach's Alpha greater than 0.686 for this population. RESULTS: 21.3% had focal onset epilepsy; 41% with generalized epilepsy without focal onset; 18.4% with focal onset that generalized; 12.6% did not know their type of epilepsy; and 6.3% reported that they were not informed about their type of epilepsy. Based on correlations, an explanatory model of quality of life is shown, with pillars such as drug adherence, self-care habits, time without seizures, and perceived disability. CONCLUSIONS: Although time without seizures is a fundamental element in recovery, living conditions and mental health problems are key elements to achieve a better quality of life in epilepsy.


TITLE: Calidad de vida en personas con epilepsia. Más allá de las crisis.Introducción. Las personas con epilepsia tienen múltiples barreras para recuperarse: acceso a medicamentos, comorbilidades y problemas sociales. El objetivo del presente estudio es determinar factores psicosociales asociados con la percepción de la calidad de vida en personas con epilepsia en el departamento de Bolívar, Colombia, en el año 2022. Sujetos y métodos. Estudio descriptivo de corte transversal, correlacional, con un muestreo estratificado con un margen de error del 5%, según el cálculo del promedio de personas atendidas por epilepsia en Colombia. Participaron 174 personas con una edad media de 39,55 años, un 50% hombres y un 50% mujeres. Se usó un instrumento que determinó datos sociodemográficos, calidad de vida (Quality of Life in Epilepsy Inventory-10), adhesión al tratamiento (test de Morisky), conductas de autocuidado, percepción de incapacidad y prestación de los servicios de salud. Todos los instrumentos mostraron un alfa de Cronbach superior a 0,686 para esta población. Resultados. El 21,3% contó con epilepsia de inicio focal; el 41%, con epilepsia generalizada sin inicio focal; el 18,4%, con epilepsia de inicio focal que generaliza; el 12,6% desconocía su tipo de epilepsia; y el 6,3% manifestó que no fue informado sobre su tipo de epilepsia. Basándose en correlaciones, se muestra un modelo explicativo de calidad de vida, con pilares como la adhesión farmacológica, los hábitos de autocuidado, el tiempo sin crisis y la incapacidad percibida. Conclusiones. Aunque el tiempo sin crisis constituye un elemento fundamental en la recuperación, las condiciones de vida y los problemas de salud mental constituyen elementos claves para lograr una mejor calidad de vida en epilepsia.


Assuntos
Epilepsias Parciais , Epilepsia , Masculino , Humanos , Feminino , Adulto , Qualidade de Vida/psicologia , Estudos Transversais , Epilepsia/tratamento farmacológico , Convulsões/tratamento farmacológico , Epilepsias Parciais/tratamento farmacológico
4.
Acta ortop. mex ; 36(4): 216-222, jul.-ago. 2022. tab, graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1519957

RESUMO

Resumen: Introducción: las fracturas del radio distal son las más comunes en extremidades superiores. Estandarizar las mediciones radiográficas para su abordaje quirúrgico es importante. Este estudio midió la reproducibilidad intra/interobservador de parámetros radiográficos asociados al éxito quirúrgico en estas fracturas. Material y métodos: diseño transversal retrospectivo con datos secundarios de expedientes clínicos. Se evaluaron radiografías de 112 fracturas en planos posteroanterior y lateral por dos traumatólogos estandarizados en toma de mediciones para calcular cinco parámetros indicativos de éxito postquirúrgico: altura radial, inclinación radial, inclinación volar, varianza cubital y escalón articular. La reproducibilidad de distancias y ángulos se evaluó con el método de Bland-Altman calculando: diferencia media entre mediciones, rango a ± 2 DE y proporción de mediciones fuera de ± 2 DE. El éxito postquirúrgico se comparó en pacientes con/sin obesidad según la media de las dos mediciones de cada evaluador. Resultados: el evaluador 1 tuvo la mayor diferencia intraobservador en altura radial (0.16 mm) y la mayor proporción fuera de ± 2 DE en varianza cubital (8.1%); el evaluador 2 tuvo la mayor diferencia en inclinación volar (1.92o) y la mayor proporción en inclinación radial (10.7%). La mayor diferencia interobservador fue en varianza cubital (1.02 mm) y la mayor proporción fuera de ± 2 DE en altura radial (5.4%). La inclinación radial tuvo la mayor diferencia (1.41o) con 4.5% de mediciones fuera de ± 2 DE. La varianza cubital y la inclinación volar tuvieron la mayor diferencia de éxito postquirúrgico entre evaluadores, sobre todo en pacientes con obesidad. Conclusión: mejorar la calidad radiográfica y estandarizar las mediciones resulta en indicadores más reproducibles.


Abstract: Introduction: distal radius fractures are the most common in upper extremities. Therefore, it is important to standardize radiographic measures for their surgical approach. This study assessed the intra/interobserver reproducibility of radiographic parameters associated with surgical success of distal radius fractures. Material and methods: retrospective cross-sectional design of secondary data extracted from clinical records. Posteroanterior and lateral X-rays of 112 distal radius fractures were assessed by two trauma specialists standardized in the measurements required to compute five parameters indicative of postoperative success: radial height, radial inclination, volar tilt, ulnar variance, and articular stepoff. The reproducibility of distances and angles was evaluated using the Bland-Altman method, calculating the mean of the difference between measurements, the range at ± 2 SD, and the proportion of measurements outside ± 2 SD. Postoperative success was also compared between patients with and without obesity according to the mean of the two measures made by each evaluator. Results: evaluator 1 had the largest intra-observer difference in radial height (0.16 mm) and the largest proportion outside ± 2 SD in ulnar variance (8.1%); evaluator 2 had the largest difference in volar tilt (1.92o) and the highest proportion in radial inclination (10.7%). The largest inter-observer difference was for ulnar variance (1.02 mm) and the largest proportion outside ± 2 SD. for radial height (5.4%). Radial tilt had the largest difference (1.41o) with 4.5% of measurements outside ± 2 SD. Ulnar variance and volar tilt had the largest difference in postoperative success between evaluators, especially in patients with obesity. Conclusion: improving the radiographic quality and standardizing the measurements results in more reproducible indicators.

5.
Antimicrob Agents Chemother ; 66(5): e0202121, 2022 05 17.
Artigo em Inglês | MEDLINE | ID: mdl-35416710

RESUMO

Chagas disease (ChD), caused by Trypanosoma cruzi, has a global prevalence due to patient migration. However, despite its worldwide distribution, long-term follow-up efficacy studies with nifurtimox (NF) are scarce and have been conducted with only small numbers of patients. A retrospective study of a large cohort of ChD treated children and adults with NF. Treatment response was evaluated by clinical, parasitological, and serological after-treatment evaluation. A total of 289 patients were enrolled, of which 199 were children and 90 adults. At diagnosis, 89.6% of patients were asymptomatic. Overall, all symptomatic patients showed clinical improvement. At baseline, parasitemia was positive in 130 of 260 (50%) patients. All but one adult patient had cleared their parasitemia by the end of treatment. That patient was considered a treatment failure. Median follow-up time for children was 37.7 months, with an interquartile range of (IQR25-75 12.2 to 85.3), and for adults was 14.2 months (IQR25-75, 1.9 to 33.8). After treatment, a decrease of T. cruzi antibodies and seroconversion were observed in 34.6% of patients. The seroconversion profile showed that, the younger the patient, the higher the rate of seroconversion (log rank test; P value, <0.01). At least 20% seroreduction at 1 year follow-up was observed in 33.2% of patients. Nifurtimox was highly effective for ChD treatment. Patients had excellent treatment responses with fully resolved symptoms related to acute T. cruzi infection. Clearance of parasitemia and a decrease in T. cruzi antibodies were observed as markers of treatment response. This study reinforces the importance of treating patients during childhood since the treatment response was more marked in younger subjects. (This protocol was registered at ClinicalTrials.gov under registration number NCT04274101).


Assuntos
Doença de Chagas , Nitroimidazóis , Tripanossomicidas , Trypanosoma cruzi , Adulto , Anticorpos Antiprotozoários , Doença de Chagas/tratamento farmacológico , Criança , Estudos de Coortes , Humanos , Nifurtimox/uso terapêutico , Nitroimidazóis/uso terapêutico , Parasitemia/tratamento farmacológico , Estudos Retrospectivos , Tripanossomicidas/uso terapêutico
6.
Arch Soc Esp Oftalmol (Engl Ed) ; 97(3): 124-132, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35248393

RESUMO

PURPOSE: To analyse the distribution of the difference between both eyes in the calculation of the dioptric power of the intraocular lens in a series of 7994 patients and the biometric variables that determine it. METHODS: The data of patients between 3 and 99 years old, residents of the city of Guayaquil and neighbouring sites, who received ocular biometry by partial optical coherence interferometry between 2004 and 2020 were reviewed. Ocular biometrics, including axial length (AL), anterior chamber depth (ACD), and the mean corneal dioptre power (CD), were measured by partial coherence interferometry. Refraction without or with cycloplegia was recorded in spherical equivalent (SE). The Haigis formula from the IOL Master instrument was used to calculate the dioptric power of the intraocular lens in both eyes. RESULTS: Data from the bilateral optical biometry of 7994 patients were analysed. The mean and standard deviation of AL, CD, ACD and dioptre power of the IOL were 23.66 ±â€¯1.25, 43.70 ±â€¯1.49, 3.34 ±â€¯0.40 and +20.46 ±â€¯3.84, respectively. 2538 (31.7%) patients had equal dioptre power of the IOL between both eyes. 3243 (40.6%) patients had a 0.50 D difference; 1162 (14.5%), 1.0 D; 425 (5.3%), 1.5 D. 626 patients (7.8%) had a difference in IOL dioptre of 2 D or more, with a maximum of 24 D. The asymmetry of AL between OU was ≥0.4 mm in 10.49%, while that of CD reached ≥1 D in 1.9%. CONCLUSIONS: 92.16% of patients had a difference within 1.5 D between both eyes in the calculation of the dioptre power of the intraocular lens. In case an eye is programmed in which it is impossible to perform a reliable biometry, either due to trauma or due to white or brunescent cataract, the calculation of the intraocular lens could be done taking as a reference the biometry of the contralateral eye.


Assuntos
Lentes Intraoculares , Facoemulsificação , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Biometria , Criança , Pré-Escolar , Córnea , Humanos , Pessoa de Meia-Idade , Óptica e Fotônica , Adulto Jovem
7.
Acta Ortop Mex ; 36(4): 216-222, 2022.
Artigo em Espanhol | MEDLINE | ID: mdl-36977640

RESUMO

INTRODUCTION: distal radius fractures are the most common in upper extremities. Therefore, it is important to standardize radiographic measures for their surgical approach. This study assessed the intra/interobserver reproducibility of radiographic parameters associated with surgical success of distal radius fractures. MATERIAL AND METHODS: retrospective cross-sectional design of secondary data extracted from clinical records. Posteroanterior and lateral X-rays of 112 distal radius fractures were assessed by two trauma specialists standardized in the measurements required to compute five parameters indicative of postoperative success: radial height, radial inclination, volar tilt, ulnar variance, and articular stepoff. The reproducibility of distances and angles was evaluated using the Bland-Altman method, calculating the mean of the difference between measurements, the range at ± 2 SD, and the proportion of measurements outside ± 2 SD. Postoperative success was also compared between patients with and without obesity according to the mean of the two measures made by each evaluator. RESULTS: evaluator 1 had the largest intra-observer difference in radial height (0.16 mm) and the largest proportion outside ± 2 SD in ulnar variance (8.1%); evaluator 2 had the largest difference in volar tilt (1.92o) and the highest proportion in radial inclination (10.7%). The largest inter-observer difference was for ulnar variance (1.02 mm) and the largest proportion outside ± 2 SD. for radial height (5.4%). Radial tilt had the largest difference (1.41o) with 4.5% of measurements outside ± 2 SD. Ulnar variance and volar tilt had the largest difference in postoperative success between evaluators, especially in patients with obesity. CONCLUSION: improving the radiographic quality and standardizing the measurements results in more reproducible indicators.


INTRODUCCIÓN: las fracturas del radio distal son las más comunes en extremidades superiores. Estandarizar las mediciones radiográficas para su abordaje quirúrgico es importante. Este estudio midió la reproducibilidad intra/interobservador de parámetros radiográficos asociados al éxito quirúrgico en estas fracturas. MATERIAL Y MÉTODOS: diseño transversal retrospectivo con datos secundarios de expedientes clínicos. Se evaluaron radiografías de 112 fracturas en planos posteroanterior y lateral por dos traumatólogos estandarizados en toma de mediciones para calcular cinco parámetros indicativos de éxito postquirúrgico: altura radial, inclinación radial, inclinación volar, varianza cubital y escalón articular. La reproducibilidad de distancias y ángulos se evaluó con el método de Bland-Altman calculando: diferencia media entre mediciones, rango a ± 2 DE y proporción de mediciones fuera de ± 2 DE. El éxito postquirúrgico se comparó en pacientes con/sin obesidad según la media de las dos mediciones de cada evaluador. RESULTADOS: el evaluador 1 tuvo la mayor diferencia intraobservador en altura radial (0.16 mm) y la mayor proporción fuera de ± 2 DE en varianza cubital (8.1%); el evaluador 2 tuvo la mayor diferencia en inclinación volar (1.92o) y la mayor proporción en inclinación radial (10.7%). La mayor diferencia interobservador fue en varianza cubital (1.02 mm) y la mayor proporción fuera de ± 2 DE en altura radial (5.4%). La inclinación radial tuvo la mayor diferencia (1.41o) con 4.5% de mediciones fuera de ± 2 DE. La varianza cubital y la inclinación volar tuvieron la mayor diferencia de éxito postquirúrgico entre evaluadores, sobre todo en pacientes con obesidad. CONCLUSIÓN: mejorar la calidad radiográfica y estandarizar las mediciones resulta en indicadores más reproducibles.


Assuntos
Fraturas do Rádio , Fraturas do Punho , Humanos , Estudos Retrospectivos , Reprodutibilidade dos Testes , Estudos Transversais , Fraturas do Rádio/diagnóstico por imagem , Fraturas do Rádio/cirurgia , Rádio (Anatomia) , Fixação Interna de Fraturas/métodos , Placas Ósseas , Amplitude de Movimento Articular , Resultado do Tratamento
8.
EClinicalMedicine ; 43: 101242, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34957385

RESUMO

BACKGROUND: The use of rosuvastatin plus colchicine and emtricitabine/tenofovir in hospitalized patients with SARS-CoV-2 disease (COVID-19) has not been assessed. The objective of this study was to assess the effectiveness and safety of rosuvastatin plus colchicine, emtricitabine/tenofovir, and their combined use in these patients. METHODS: This was a randomized, controlled, open-label, multicentre, parallel, pragmatic study conducted in six referral hospitals in Bogotá, Colombia. The study enrolled hospitalized patients over 18 years of age with a confirmed diagnosis of COVID-19 complicated with pneumonia, not on chronic treatment with the study medications, and with no contraindications for their use. Patients were assigned 1:1:1:1. 1) emtricitabine with tenofovir disoproxil fumarate (FTC/TDF, 200/300 mg given orally for 10 days); 2) colchicine plus rosuvastatin (COLCH+ROSU, 0.5 mg and 40 mg given orally for 14 days); 3) emtricitabine with tenofovir disoproxil plus colchicine and rosuvastatin at the same doses and for the same period of time (FTC/TDF+COLCH+ROSU); or 4) the Colombian consensus standard of care, including a corticosteroid (SOC). The primary endpoint was 28-day all-cause mortality. A modified intention-to-treat analysis was used together with a usefulness analysis to determine which could be the best treatment. The trial was registered at ClinicalTrials.gov: NCT04359095. FINDINGS: Out of 994 candidates considered between August 2020 and March 2021, 649 (65.3%) patients agreed to participate and were enrolled in this study; among them, 633 (97.5%) were included in the analysis. The mean age was 55.4 years (SD ± 12.8 years), and 428 (68%) were men; 28-day mortality was significantly lower in the FTC/TDF+COLCH+ROSUV group than in the SOC group, 10.7% (17/159) vs. 17.4% (28/161) (hazard ratio [HR] 0.53; 95% CI 0.29 to 0.96). Mortality in the FTC/TDF group was 13.8% (22/160, HR 0.68, 95% CI 0.39 to 1.20) and 14.4% in the COLCH+ROSU group (22/153) (HR 0.78, 95% CI 0.44 to 1.36). A lower need for invasive mechanical ventilation was observed in the FTC/TDF+COLCH+ROSUV group than in the SOC group (risk difference [RD] - 0.08, 95% CI 0.11 to 0.04). Three patients presented severe adverse events, one severe diarrhoea in the COLCH+ROSU and one in the FTC/TDF+COLCH+ROSU group and one general exanthema in the FTC/TDF group. INTERPRETATION: The combined use of FTC/TDF+COLCH+ROSU reduces the risk of 28-day mortality and the need for invasive mechanical ventilation in hospitalized patients with pulmonary compromise from COVID-19. More randomized controlled trials are needed to compare the effectiveness and cost of treatment with this combination versus other drugs that have been shown to reduce mortality from SARS-CoV-2 infection and its usefulness in patients with chronic statin use.

9.
Braz. j. biol ; 82: 1-8, 2022. graf, tab, ilus
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-1468449

RESUMO

Aedes aegypti is a culicide that has gained relevance over the years due to its ability to transmit various viruses that cause diseases in humans that all the years cause high mortality rates in the world population. The main problem is that Ae. aegypti has managed to establish and maintain a close relationship with humans and their habitat, which is why the search for alternatives to control vector populations becomes imperative. The objective of the present work was to study the effects of two Beauveria bassiana strains on Aedes aegypti. Third instar larvae of Ae. aegypti in 250 mL plastic containers were inoculated with the GHA and NB3 strains at different concentrations (1.5 × 104, 1.5× 105, 1.5 × 106 and 1.5 × 107 conidia/mL). The NB3 strain presented highest mortality values with 63% in the highest concentration i.e., 1.5 × 107, while for the GHA strain the highest mortality value was 30.7% at the same concentration. The results showed significant difference in mortality with respect to the strain and days post treatment (P = 0.0001), but not with respect to the conidial concentration (P = 0.634). The average mortality of larvae per day for the NB3 for different concentrations ranged from 20 to 25 larvae per day, while for the GHA daily mortality ranged from 5 to 12 larvae. In post-treatment mortality, the highest mortality was recorded in the third stage larvae for the NB3, while for GHA the highest percentage mortality was observed in individuals who managed to reach the adult state. The findings of the current research depicted the noteworthy role of B. bassiana for the management of an important vector of human disease.


O Aedes aegypti é um culicida que vem ganhando relevância ao longo dos anos devido à sua capacidade de transmitir diversos vírus causadores de doenças em humanos que ao longo dos anos ocasionam altas taxas de mortalidade na população mundial. O principal problema é que Ae. aegypti tem conseguido estabelecer e manter uma relação próxima com o homem e seu habitat, por isso a busca por alternativas para o controle das populações de vetores torna-se imperativa. O objetivo do presente trabalho foi estudar os efeitos de duas cepas de Beauveria bassiana sobre Ae. aegypti. Larvas de terceiro instar de Ae. aegypti em recipientes plásticos de 250 mL foram inoculados com as cepas GHA e NB3 em diferentes concentrações (1.5 × 104, 1.5 × 105, 1.5 × 106 e 1.5 × 107 conídios/mL). A cepa NB3 apresentou os maiores valores de mortalidade com 63% na concentração mais alta, ou seja, 1.5 × 107, enquanto para a cepa GHA o maior valor de mortalidade foi 30.7% na mesma concentração. Os resultados mostraram diferença significativa na mortalidade com relação à cepa e dias pós-tratamento (P = 0.0001), mas não com relação à concentração de conídios (P = 0.634). A mortalidade média de larvas por dia para o NB3 para diferentes concentrações variou de 20 a 25 larvas por dia, enquanto para o GHA a mortalidade diária variou de 5 a 12 larvas. Na mortalidade pós-tratamento, a maior mortalidade foi registrada nas larvas de terceiro estágio para o NB3, enquanto para o GHA o maior percentual de mortalidade foi observado em indivíduos que conseguiram atingir o estado adulto. Os resultados da pesquisa atual retratam o papel notável de B. bassiana no manejo de um importante vetor de doenças humanas.


Assuntos
Animais , Aedes , Beauveria/patogenicidade , Controle de Pragas/métodos , Infecções por Arbovirus/veterinária
10.
Braz. j. biol ; 822022.
Artigo em Inglês | LILACS-Express | LILACS, VETINDEX | ID: biblio-1468636

RESUMO

Abstract Aedes aegypti is a culicide that has gained relevance over the years due to its ability to transmit various viruses that cause diseases in humans that all the years cause high mortality rates in the world population. The main problem is that Ae. aegypti has managed to establish and maintain a close relationship with humans and their habitat, which is why the search for alternatives to control vector populations becomes imperative. The objective of the present work was to study the effects of two Beauveria bassiana strains on Aedes aegypti. Third instar larvae of Ae. aegypti in 250 mL plastic containers were inoculated with the GHA and NB3 strains at different concentrations (1.5 × 104, 1.5× 105, 1.5 × 106 and 1.5 × 107 conidia/mL). The NB3 strain presented highest mortality values with 63% in the highest concentration i.e., 1.5 × 107, while for the GHA strain the highest mortality value was 30.7% at the same concentration. The results showed significant difference in mortality with respect to the strain and days post treatment (P = 0.0001), but not with respect to the conidial concentration (P = 0.634). The average mortality of larvae per day for the NB3 for different concentrations ranged from 20 to 25 larvae per day, while for the GHA daily mortality ranged from 5 to 12 larvae. In post-treatment mortality, the highest mortality was recorded in the third stage larvae for the NB3, while for GHA the highest percentage mortality was observed in individuals who managed to reach the adult state. The findings of the current research depicted the noteworthy role of B. bassiana for the management of an important vector of human disease.


Resumo O Aedes aegypti é um culicida que vem ganhando relevância ao longo dos anos devido à sua capacidade de transmitir diversos vírus causadores de doenças em humanos que ao longo dos anos ocasionam altas taxas de mortalidade na população mundial. O principal problema é que Ae. aegypti tem conseguido estabelecer e manter uma relação próxima com o homem e seu habitat, por isso a busca por alternativas para o controle das populações de vetores torna-se imperativa. O objetivo do presente trabalho foi estudar os efeitos de duas cepas de Beauveria bassiana sobre Ae. aegypti. Larvas de terceiro instar de Ae. aegypti em recipientes plásticos de 250 mL foram inoculados com as cepas GHA e NB3 em diferentes concentrações (1.5 × 104, 1.5 × 105, 1.5 × 106 e 1.5 × 107 conídios/mL). A cepa NB3 apresentou os maiores valores de mortalidade com 63% na concentração mais alta, ou seja, 1.5 × 107, enquanto para a cepa GHA o maior valor de mortalidade foi 30.7% na mesma concentração. Os resultados mostraram diferença significativa na mortalidade com relação à cepa e dias pós-tratamento (P = 0.0001), mas não com relação à concentração de conídios (P = 0.634). A mortalidade média de larvas por dia para o NB3 para diferentes concentrações variou de 20 a 25 larvas por dia, enquanto para o GHA a mortalidade diária variou de 5 a 12 larvas. Na mortalidade pós-tratamento, a maior mortalidade foi registrada nas larvas de terceiro estágio para o NB3, enquanto para o GHA o maior percentual de mortalidade foi observado em indivíduos que conseguiram atingir o estado adulto. Os resultados da pesquisa atual retratam o papel notável de B. bassiana no manejo de um importante vetor de doenças humanas.

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