Fasciolosis is a food borne zoonosis, caused by the digenetic trematode Fasciola. Freshwater lymnaeid snails are the intermediate host of the trematodes. Chlorophyllin, a semi-synthetic derivative of chlorophyll and its formulations obtained from freeze dried cow urine (FCU) had their toxicity tested against redia and cercaria larvae of F. gigantica. The larvicidal activity of chlorophyllin and its formulations were found to depend on both, time and concentration used against the larvae. Toxicity of chlorophyllin + FCU (1:1 ratio) in sunlight against redia larva (8 h LC50: 0.03 mg/mL) was more pronounced than using just chlorophyllin (8 h LC50: 0.06 mg/mL). Toxicity of chlorophyllin + FCU in sunlight against redia (8 h LC50: 0.03 mg/mL) was higher than against cercaria (8 h LC50: 0.06 mg/mL). The larvicidal activity of chlorophyllin in sunlight (redia/cercaria larvae: 8 h LC50: 0.06 mg/mL) was more pronounced than under laboratory conditions (redia: 8 h LC50: 22.21 mg/mL/, cercaria 8 h LC50: 96.21 mg/mL). Toxicity of FCU against both larvae was lower than that of chlorophyllin and chlorophyllin + FCU. Chlorophyllin and its formulations + FCU were 357.4 to 1603.5 times more effective against redia/cercaria larvae in sunlight than under laboratory conditions. The present study has shown that chlorophyllin formulations may be used as potent larvicides against fasciolosis.

RESUMO A infecção alimentar pelo trematóide da fasciolíase é uma dentre os mais comuns problemas de saúde pública mundiais, causando grande prejuízo econômico para a humanidade. Controle da população de caramujos abaixo de determinado nível é um dos métodos no campo mais importantes para a redução da incidência da fasciolíase. O ciclo de vida do parasita pode ser interrompido pela morte do caramujo ou da larva redia e cercária da Fasciola dentro da Lymnaea acuminata. Foi testada a toxicidade in vitro das diferentes combinações binárias (relação 1:1) entre os vários componentes larvicidas ativos da planta tais como citral, ácido ferúlico, umbeliferone, azadiractina, e alicina contra a Fasciola redia e a cercária. A mortalidade das larvas foi observada após duas, quatro, seis e oito horas de tratamento. A condição in vitro azadiractina + alicina (relação 1:1) foi altamente tóxica contra redia e cercária (8h LC50 0,006 e 0,005 mg/L). Toxicidade do citral + ácido ferúlico foi a mais baixa contra redia e larvas de cercária.

SUMMARY A food-borne trematode infection fascioliasis is one among common public health problems worldwide. It caused a great economic loss for the human race. Control of snail population below a certain threshold level is one of the important methods in the campaign to reduce the incidence of fascioliasis. The life cycle of the parasite can be interrupted by killing the snail or Fasciola larva redia and cercaria inside of the snail Lymnaea acuminata. In vitro toxicity of different binary combinations (1:1 ratio) of plant-derived larvicidal active components such as citral, ferulic acid, umbelliferone, azadirachtin and allicin against Fasciola redia and cercaria were tested. The mortality of larvae was observed at 2h, 4h, 6h and 8h of treatment. In in vitro condition azadirachtin + allicin (1:1 ratio) was highly toxic against redia and cercaria (8h LC50 0.006 and 0.005 mg/L). Toxicity of citral + ferulic acid was lowest against redia and cercaria larvae.

RESUMO A atividade moluscicida do pó das folhas de Moringa oleifera e do pó liofilizado das frutas da Momordica charantia contra o caramujo Lymnaea acuminata é dependente do tempo e da sua concentração. O pó da folha da M. oleifera (96 h LC50: 197.59 ppm) foi mais tóxico do que o pó liofilizado da fruta da M. charantia (96 h LC50: 318.29 ppm). Os extratos etanólicos do pó de folha da M. oleifera e do pó liofilizado da fruta da M. charantia foram mais tóxicos do que outros extratos orgânicos solventes. O 96 h LC50 da fração purificada por coluna do pó das folhas da M. oleifera foi 22.52 ppm enquanto que o pó liofilizado do fruto da M. charantia foi 6.21 ppm. Coluna, camada fina e a alta performance da análise da cromatografia líquida mostram que os componentes ativos moluscicidas do pó da folha da M. oleifera e do liofiliizado da fruta da M. charantia são a benzilamina (96 h LC50: 22.3 ppm) e a momordicina (96 h LC50: 1.2 ppm), respectivamente. A benzilamina e a momordicina inibiram de maneira significante in vivo e in vitro a acetilcolinesterase (AChE), as atividades das fosfatases alcalina e ácida (ACP/ALP) nos tecidos nervosos da L. acuminata. A inibição da atividade da AChE, ACP e ALP nos tecidos nervosos da L. acuminata pela benzilamina e momordicina podem ser responsáveis pela atividade moluscicida da M. oleifera e dos frutos da M. charantia, respectivamente.

SUMMARY The molluscicidal activity of the leaf powder of Moringa oleifera and lyophilized fruit powder of Momordica charantia against the snail Lymnaea acuminata was time and concentration dependent. M. oleifera leaf powder (96 h LC50: 197.59 ppm) was more toxic than M. charantia lyophilized fruit powder (96 h LC50: 318.29 ppm). The ethanolic extracts of M. oleifera leaf powder and Momordica charantia lyophilized fruit powder were more toxic than other organic solvent extracts. The 96 h LC50 of the column purified fraction of M. oleifera leaf powder was 22.52 ppm, while that of M. charantia lyophilized fruit powder was 6.21 ppm. Column, thin layer and high performance liquid chromatography analysis show that the active molluscicidal components in M. oleifera leaf powder and lyophilized fruit of M. charantia are benzylamine (96 h LC50: 2.3 ppm) and momordicine (96 h LC50: 1.2 ppm), respectively. Benzylamine and momordicine significantly inhibited, in vivo and in vitro, the acetylcholinesterase (AChE), acid and alkaline phosphatase (ACP/ALP) activities in the nervous tissues of L. acuminata. Inhibition of AChE, ACP and ALP activity in the nervous tissues of L. acuminata by benzylamine and momordicine may be responsible for the molluscicidal activity of M. oleifera and M. charantia fruits, respectively.

BACKGROUND: Adults with severe mental illness (SMI) display an increased prevalence of HIV compared with the general population. Recommendations for provider-initiated testing in South Africa lack robust evidence because the studies - mainly from low-prevalence regions - overestimate the risk of HIV among adults with SMI. OBJECTIVE: We aimed to assess whether the mentally ill are a vulnerable population in South Africa. Methods. All new admissions to an acute psychiatric ward from July to December 2000 were tested for HIV anonymously and the results linked with socio-demographic and clinical data. We did a restricted analysis of black females from a population-based survey of black females with SMI. RESULTS: There were 216 admissions, of whom 206 were included in the analysis. The seroprevalence of HIV-1 was 29.1% (confidence interval 27.8 - 32.4); seroprevalence of HIV among the women was 40%. The following predicted HIV positivity: female (odds ratio (OR) 3.5 (1.7 - 6.9)), infections of the chest or central nervous system (OR 3.2 (1.4 - 7.5)), age group 30 - 39 years (OR 2.3 (1.1 - 4.8)) and aggression on admission. The age and sex ratios among the SMI group were similar to the general population. Adults with SMI have an almost three times greater prevalence of HIV than the general population, after controlling for age and gender. CONCLUSIONS: Adults with SMI are a vulnerable population; therefore, provider-initiated HIV testing and other prevention and treatment programmes must be tailored to their needs.

JUSTIFICATIVA E OBJETIVOS: A percepção dos pacientes a respeito da utilidade do Ambulatório de Avaliação Pré-anestésica e o fluxo de pacientes não foram extensamente estudados no mundo em desenvolvimento. O objetivo deste estudo foi analisar esse aspecto. MÉTODO: Foi realizada pesquisa aplicando-se questionário entre pacientes atendidos no Ambulatório de Avaliação Pré-anestésica de um hospital terciário de ensino em Trinidad. A título de comparação, esse questionário também foi distribuído aos pacientes atendidos no Ambulatório de Cirurgia Geral. Os parâmetros demográficos, incluindo idade, sexo, nível escolar e estado físico ASA foram anotados. Outros dados registrados incluíam o fluxo de pacientes e detalhes a respeito da equipe médica. RESULTADOS: Dos 220 pacientes atendidos no Ambulatório de Avaliação Pré-anestésica, 92,7% participaram do estudo. A validade do questionário foi apoiada pelo coeficiente alfa de Cronbach (0,67). O tempo médio para o encaminhamento do Ambulatório de Cirurgia para a Clínica Pré-anestésica foi de 50 dias; a espera média na clínica foi de 2,7 horas e da espera pela intervenção cirúrgica após a aceitação pelo ambulatório foi de 13 dias. As opiniões dos pacientes a respeito dos benefícios da clínica e tempo de espera não foram influenciadas pela idade nem pelo nível educacional. Na opinião dos pacientes, o atendimento no Ambulatório de Avaliação Pré-anestésica foi satisfatório, mas os tempos de espera foram considerados longos. CONCLUSÕES: Na opinião dos pacientes, a consulta no Ambulatório de Avaliação Pré-anestésica antes do procedimento cirúrgico foi útil e o atendimento foi considerado satisfatório.

BACKGROUND AND OBJECTIVES: Perception of the patients regarding the utility of the Preanesthetic Clinics and flow time in clinics has not been widely studied in the developing world. The present study aims to study this aspect. METHODS: A self-administered 15-item questionnaire survey was conducted among patients attending the Preanesthetic Clinics at a tertiary care teaching hospital in Trinidad. The questionnaire was also distributed to the patients attending the General Surgical Clinic for comparison. Another questionnaire was distributed among the staff of the Preanesthetic Clinic. Patient demographics including age, gender, and educational status and American Society of Anesthesiologists physical status were noted. Other data recorded were patient flow time and details of attending staff. RESULTS: Of the 220 patients who attended the Preanesthetic Clinics, 92.7% participated in the study. The reliability of the questionnaire was supported by Cronbach's alpha coefficient (0.67). The median time for referral from the surgical clinic to Preanesthetic Clinic was 50 days, median waiting time in the clinic was 2.7 hours, and the median waiting time for surgery after acceptance in the clinic was 13 days. The patients' opinions regarding the benefits of the clinic, length of the waiting time was independent of their age and educational status. Patients felt that attending the Preanesthetic Clinic was beneficial and not costly to them, although the waiting times were found to be longer. CONCLUSIONS: Patients perceive that attending the Preanesthetic Clinic has been useful before the surgical procedure and the care they received in the clinic was satisfactory

JUSTIFICATIVA Y OBJETIVOS: La percepción de los pacientes respecto de la utilidad del Ambulatorio de Evaluación Preanestésica como también el flujo de pacientes, no fueron extensamente estudiados en el mundo en desarrollo. El objetivo de este estudio fue analizar ese aspecto. MÉTODOS: Se realizó una investigación aplicando un cuestionario entre los pacientes atendidos en el Ambulatorio de Evaluación Preanestésica de un hospital subcontratado de enseñanza en Trinidad. Como comparación, ese cuestionario también se distribuyó a los pacientes atendidos en el Ambulatorio de Cirugía General. Los parámetros demográficos, incluyendo edad, sexo, nivel escolar y estado físico ASA se registraron. Otros datos registrados incluían el flujo de pacientes y los detalles respecto del equipo médico. RESULTADOS: De los 220 pacientes atendidos en el Ambulatorio de Evaluación Pré-anestésica, un 92,7% participaron del estudio. La validez del cuestionario fue apoyada por el coeficiente alfa de Cronbach (0,67). El tiempo promedio para la derivación al ambulatorio de cirugía para la Clínica Preanestésica fue de 50 días; el tiempo promedio de espera en la clínica fue de 2,7 horas y el de espera por la cirugía después de la aceptación por parte del ambulatorio fue de 12 días. Las opiniones de los pacientes respecto de los beneficios de la clínica y tiempo de espera no tuvieron ningún influjo por la edad ni por el nivel cultural. Según los pacientes, la atención en el Ambulatorio de Evaluación Preanestésica fue benéfica, pero los tiempos de espera fueron considerados extensos. CONCLUSIONES: Según los pacientes, la consulta en el Ambulatorio de Evaluación Preanestésica antes del procedimiento quirúrgico fue útil y la atención fue considerada satisfactoria.