RESUMO
Dengue disease represents a large and growing global threat to public health, causing a significant burden to health systems of endemic countries. For countries considering vaccination as part of their Integrated Management Strategy for Prevention and Control of Dengue, the World Health Organization currently recommends the first licensed dengue vaccine, CYD-TDV for: individuals aged 9â¯years or above from populations with high transmission rates, based on either seroprevalence criteria or pre-vaccination screening strategies, and for persons with confirmed prior exposure to infection in moderate to lower transmission settings. This paper describes the main conclusions of the Sixth Meeting of the International Dengue Initiative (IDI) held in June 2018, following release of a new product label by the manufacturer, updated WHO-SAGE recommendations, additional scientific evidence on vaccine performance, and reports of experiences by implementing countries. Considerations were made regarding the need for improving the quality of epidemiological and surveillance data in the region to help define the convenience of either of the two vaccination strategies recommended by WHO-SAGE. Extensive discussion was dedicated to the pros and cons of implementing either of such strategies in Latin America. Although, in general, a seroprevalence-based approach was preferred in high transmission settings, when cost-effectivity is favorable pre-vaccination screening is a convenient alternative. Cost-effectiveness evaluations can assist with the decisions by public health authorities of whether to introduce a vaccine. Where implemented, vaccine introduction should be part of a public health strategy that includes the participation of multiple sectors of society, incorporating input from scientific societies, ministries of heath, and civil society, while ensuring a robust communication program.
Assuntos
Vacinas contra Dengue/administração & dosagem , Dengue/prevenção & controle , Implementação de Plano de Saúde/organização & administração , Saúde Pública , Congressos como Assunto , Análise Custo-Benefício , Dengue/epidemiologia , Implementação de Plano de Saúde/estatística & dados numéricos , Humanos , Internacionalidade , América Latina/epidemiologia , Peru , Estudos Soroepidemiológicos , Organização Mundial da SaúdeRESUMO
Several species in the Botryosphaeriaceae family cause wood stain, cankers, and dieback of trunks and branches in a wide range of forest tree species. The aim of this study was to characterize the botryosphaeriaceous fungi associated with decline symptoms observed in Acacia mangium and Pinus caribaea var. hondurensis, two economically important forest tree species grown in commercial plantations in Venezuela. Fungi isolated from symptomatic samples collected from both hosts in commercial sites were identified based on their morphology and DNA sequences of the internal transcribed spacer region (ITS1-5.8S-ITS2) and part of the ß-tubulin and translation elongation factor 1-α genes. Lasiodiplodia theobromae and L. venezuelensis were routinely isolated from A. mangium and P. caribaea var. hondurensis. Additionally, the novel species Diplodia guayanensis was isolated and characterized from symptomatic and asymptomatic tissues of A. mangium. Multigene phylogenetic analyses along with restriction fragment length polymorphism studies further supported the identification of these species. A pathogenicity study was conducted under natural conditions and 12 weeks after inoculation all Botryosphaeriaceae spp. were shown to be highly virulent on A. mangium. Contrary, no lesions were observed in the wood of P. caribaea var. hondurensis when inoculated with L. theobromae and L. venezuelensis. However, both species were consistently reisolated from the asymptomatic tissue beyond the inoculation point. This study contributes to a better understand the role that species in the Botryosphaeriaceae play on disease symptoms and dieback of A. mangium and P. caribaea var. hondurensis from plantations in eastern Venezuela.
RESUMO
In May 2010, canker and wood stain symptoms in trunks and stems of 125 Acacia mangium were observed during a survey conducted in the Uverito plantations, Monagas State, Venezuela. Cankers were 20 to 65 cm long and were brownish on the margins and dark brown in the center. Many of the cankers had swollen margins and in some cases a black exudate could be seen leaking from the most severe cankers. Small pieces (4 to 5 mm) of necrotic tissues from the cankers were surface sterilized for 1 min in 1.5% NaOCl, washed twice with sterile distilled water, and plated onto potato dextrose agar amended with 0.01% tetracycline hydrochloride (PDA-tet). Plates were incubated at 25°C under near-UV light. Colonies developed from symptomatic tissue and formed a compact mycelium, which was initially white, but became dark gray with age. Based on colony morphology, isolates were tentatively identified as a member of the Botryosphaeriaceae family. Pycnidia were produced on sterilized pine needles on 2% water agar after 5 weeks of incubation at 25°C under continuous near-UV light. Conidia were ellipsoidal, initially hyaline, unicellular, becoming dark brown, and developing a thick wall, a central septum, and longitudinal striations with age. Conidia measured 26 to 31 µm long and 11 to 16 µm wide (n = 60). The conidial morphology matched that of Lasiodiplodia, a member of the Botryosphaeriaceae family (1). Primers ITS4/ITS5, Bt2a/Bt2b, and EF1-688F/EF1-1251R (2) were used to amplify and subsequently sequence the ITS1-5.8S-ITS2 region and parts of the beta-tubulin (BT) and translation elongation factor 1-alpha (TEF1-α) gene regions, respectively. The putative Lasiodiplodia isolates had 98 to 99% homology with Lasiodiplodia pseudotheobromae isolate CBS 116459 for all three loci (EF622077, EF622057, and EU673111) (1). Based on morphological characters and DNA sequencing, the canker isolates from Venezuela (CBS129752 and UCD-A1) were then identified as L. pseudotheobromae (1) and sequences were deposited in GenBank (Accession Nos. JX545091 to JX545092, JX545111 to JX545112, and JX545131 to JX545132). Pathogenicity tests were performed by inoculating 2-year-old A. mangium tree trunks with isolates CBS129752 and UCD-A1. Twenty trees per isolate were inoculated by placing a mycelium plug from the growing margin of 8-day-old colonies upside down directly into a fresh wound made with a 5-mm cork borer. Wounds were sealed with Parafilm. Ten control trees were inoculated with non-colonized PDA plugs. After 12 weeks, all inoculated seedlings showed bark swelling around the inoculation points and a brown necrosis of the wood could be observed when removing the bark. Average length necrosis above and below the point inoculation was 27.2 cm; additionally, a black exudate was observed when the outer bark was removed from inoculation points. L. pseudotheobromae was successfully reisolated from the necrotic tissue observed in symptomatic plants. No symptoms were observed in the control plants and L. pseudotheobromae was not isolated from the controls. L. pseudotheobromae has been reported in Africa, Asia, Europe, and Latin America, where it occurs on forest and fruit trees (1). This study shows L. pseudotheobromae to be highly virulent on A. mangium and, to our knowledge, this is the first report of L. pseudotheobromae on this host in Venezuela. References: (1) A. Alves et al. Fungal Diversity 28:1, 2008. (2) J. R. Úrbez-Torres et al. Plant Dis. 90:1490, 2006.
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El propósito de este estudio fue determinar el consumo de macronutrientes y calorías en niños preescolares venezolanos con Caries Severa de la Infancia Temprana (CSIT). Para ello, se examinaron 32 niños entre 4 y 5 años de edad con diagnóstico de CSIT, quienes asistieron al Postgrado de Odontología Infantil de la Facultad de Odontología de la Universidad Central de Venezuela. Se consideró un niño con CSIT aquel que presentaba lesiones cariosas, comprometiendo casi todos los dientes, incluyendo los incisivos inferiores, afectando toda la superficie dentaria. Para determinar el consumo de macronutrientes se utilizó una encuesta, en la cual se registró el tipo y cantidad de alimento ingerido durante 24h por tres días. A partir de estos datos se calculó el consumo de proteínas, grasas, hidratos de carbono totales, tipo de hidrato de carbono, así como las calorías provenientes de dichos macronutrientes. Igualmente, se realizó un cuestionario para determinar su condición socioeconómica. Los resultados indicaron que el 100% de los niños evaluados pertenecían a un estrato socioeconómico bajo con un consumo promedio de hidratos de carbono, proteínas, grasas y calorías totales de 151,2± 44,3; 31,5± 9,6; 28,8±10,9 g/día y 962.6±274,4 kcal/día, respectivamente. Al evaluar el tipo de hidrato de carbono los resultados indicaron que los niños consumían dulces retentivos en un 67,7%, dulces sólidos pegajosos en un 20,6% y azúcar en solución en un 11,8%. No se encontraron diferencias significativas en cuanto al consumo de macronutrientes y energía, de acuerdo a la edad y género. Los resultados de este estudio indican que los niños con CSIT evaluados presentaron una baja ingesta de proteínas y un consumo promedio de calorías por debajo de los valores recomendados
The purpose of this study was to determine the intake of macronutrients and the amount of calories consumed by a group of Venezuelan children with severe early childhood caries (in spanish CSIT). For this study, 32 children, 4 and 5 years of age, with severe early childhood caries coming from families with a low social-economical status, were selected. A child with severe early childhood caries was considered when almost all the teeth were affected including the lower incisors. The severe condition indicated that the majority of the surfaces were affected by the diseased. Protein, fat, carbohydrates, type of carbohydrate and total calories consumption of each child were determined over three days using a 24 hours recall method. At the same time a questionnaire to determine the social-economical conditions was implemented. The results showed that 100% of the children came from low social-economical status with an average carbohydrates, proteins, fats and calories consumption of 151.2± 44.3; 31.5± 9.6, 28.8± 10.9 g/day and 962.6± 274.4 Kcal/day, respectively. When the type of carbohydrate was analyzed the result showed that 67.7% children ingested retentive sweet, 20.6% solid sticky sweet and 11.8% sugar in solution. When the macronutrients and calories consumption were evaluated according to age and gender, no differences were observed. The results of this study indicate that the evaluated children presented a low daily intake of proteins and a mean consumption of calorie below the recommended values
Assuntos
Humanos , Masculino , Feminino , Criança , Criança , Cárie Dentária/diagnóstico , Dieta , Nutrientes , Fatores Socioeconômicos , OdontologiaRESUMO
Blueberry (Vaccinium spp.) plantings have significantly increased in Chile during the last decade and, currently, over 10,700 ha are cultivated throughout the country. Among other diseases, stem canker and dieback has been frequently observed in commercial plantations with incidences between 15 and 45%. The aim of this study was to identify and characterize Neofusicoccum spp. causing stem canker and dieback of blueberry in Chile. Three species, N. arbuti, N. australe, and N. parvum, were identified based on colony and conidia morphology, and nucleotide sequence analysis of the internal transcribed spacer (ITS) region (ITS1-5.8S-ITS2). These Neofusicoccum spp. were found alone or coexisting with Pestalotiopsis spp., Truncatella spp., or Phomopsis spp. Koch's postulates showed all Neofusicoccum spp. isolated from infected plants to be pathogenic when inoculated on blueberry fruit and twigs using both mycelia and conidia suspension. All blueberry cultivars tested, including, Brigitta, Bluecrop, Brightwell, Duke, Elliott, Misty, and O'Neal, were susceptible to Neofusicoccum spp. infection. Pathogenicity tests showed N. parvum to be the most virulent species and Elliott to be the most susceptible cultivar. This report represents the first description of N. arbuti, N. australe, and N. parvum as canker-causing agents on blueberry in Chile.
RESUMO
Perennial cankers and consequent grapevine dieback are a major problem in vineyards of Sonora and Baja California, the most important grape-production areas of Mexico. In order to identify the canker-causing agents, symptomatic arms, cordons, and trunks were collected from 13 and 6 vineyards in Sonora and Baja California, respectively. Two Botryosphaeriaceae spp., Lasiodiplodia theobromae and Diplodia seriata, were isolated frequently from infected wood and identified based on morphological and cultural characters as well as analyses of nucleotide sequences of three genes, the internal transcribed spacer region (ITS1-5.8S-ITS2), a partial sequence of the ß-tubulin gene, and part of the translation elongation factor 1-α gene (EF1-α). Although both L. theobromae and D. seriata were isolated from grapevine cankers in Baja California, only L. theobromae was found in vines in the Sonora region. Pathogenicity of both species was verified by inoculation of rooted cuttings and green shoots of Thompson Seedless and Chardonnay cultivars. Isolates of L. theobromae were more virulent, based on the extent of spread in the secondary wood and green tissue, than those of D. seriata. These findings confirm L. theobromae and D. seriata as the causal agents of dieback and canker formation of grapevines in northern Mexico.
RESUMO
A cluster of 16 cases of hyper-reactive malarious splenomegaly (HMS) with severe, acute haemolysis, from an isolated, Venezuelan, Yanomami population, was prospectively investigated. Nine (69%) of the 13 HMS sera investigated but only one (7%) of 14 control sera (P < 0.005) contained elevated titres (of at least 1:32) of complement-fixing IgM cold agglutinins (CA). The CA detected had specificity for both the I and i blood-group antigens (with a relative predominance of anti-I) and wide thermal stability. The mean reciprocal CA titre was much higher for the HMS sera than for the control samples (59.16 v. 2.28; P < 0.001). Indirect tests for antiglobulin were positive for two of the 13 HMS cases (but none of 14 controls) investigated; all of the direct tests for antiglobulin gave negative results. The seven HMS cases checked, using an assay based on a nested PCR which amplified species-specific ribosomal sequences from Plasmodium vivax or P. falciparum, each yielded the PCR product that indicated P. vivax infection. However, only six (25%) of the 24 control samples (collected, at the same time as the HMS samples, from asymptomatic adults from the same Yanomami population) were PCR-positive (P < 0.001). In some cases at least, the acute severe episodes of haemolysis occasionally seen in HMS appear to be associated with an auto-immune, cold-agglutinin-mediated response triggered by non-patent parasitaemias.
Assuntos
Aglutininas/análise , Hemólise/imunologia , Indígenas Sul-Americanos , Malária/imunologia , Parasitemia/imunologia , Esplenomegalia/imunologia , Adulto , Animais , Anticorpos Antiprotozoários/análise , Autoanticorpos/análise , Análise por Conglomerados , Crioglobulinas , Surtos de Doenças , Eletroforese em Gel de Poliacrilamida , Humanos , Testes Imunológicos , Malária/parasitologia , Parasitemia/epidemiologia , Plasmodium falciparum/imunologia , Plasmodium vivax/imunologia , Reação em Cadeia da Polimerase/métodos , Estudos Prospectivos , RNA de Protozoário/análise , Esplenomegalia/epidemiologia , Esplenomegalia/parasitologiaRESUMO
BACKGROUND: We show the experience of 6 years in laparoscopic surgical therapy of esophageal achalasia, performing of the Heller-Dor or Heller-Toupet operation, with particular regard to the technical aspect. METHODS: One hundred and ten laparoscopic interventions were done between November 1995 and December 2001. We studied operative time in hiatus approach, esophagocardiomyotomy, transoperative endoscopy, and anti-reflux procedure. We also analyzed the relation between complications and clinical evolution of disease with clinical stage. RESULTS: The mean surgical time of the intervention is 138 min, and it is significantly increased by transoperative endoscopic control; conversion to open surgery was not necessary. Clinical results are classified as excellent in 103 patients. Morbidity was 6%. CONCLUSION: This surgical procedure is a first line in the treatment of esophageal achalasia. It is necessary to have special care in early diagnostic cases to avoid electrosurgical injury.
Assuntos
Acalasia Esofágica/cirurgia , Laparoscopia/estatística & dados numéricos , Adolescente , Adulto , Idoso , Cuba/epidemiologia , Esofagoscopia/estatística & dados numéricos , Feminino , Seguimentos , Humanos , Tempo de Internação/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Recidiva , Resultado do TratamentoRESUMO
Acute bilateral parotitis is a common clinical feature of various infectious and autoimmune, metabolic, and drug-related conditions. We describe a unique case of bilateral inflammatory enlargement of the parotid glands in an immunocompetent patient with dengue fever. Evidence of dengue virus in the saliva is also provided for the first time.
Assuntos
Vírus da Dengue/isolamento & purificação , Dengue/complicações , Parotidite/etiologia , Doença Aguda , Animais , Linhagem Celular , Dengue/virologia , Vírus da Dengue/genética , Humanos , Masculino , Pessoa de Meia-Idade , Parotidite/patologia , RNA Viral/sangue , RNA Viral/genética , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Saliva/virologiaRESUMO
Leptospirosis is a common disease in Latin America. Transmission to humans occurs by contact with water or soil contaminated with the urine of rodents, dogs, or livestock. Pathogenesis is still poorly understood, and bacterial toxin or virulence factors are probably responsible for many features of the disease. The anicteric form is the most frequent presentation, and its clinical picture resembles influenza or other acute febrile diseases. Icterohemorrhagic leptospirosis, or Weil's syndrome, represents the severe form of the disease. Its clinical picture is similar to bacterial sepsis and multiple organ involvement occurs, mainly in kidneys and lungs, and causes great morbidity and mortality. Death is often related to multiple organ failure and pulmonary hemorrhages. Diagnosis is based on serology or blood, cerebrospinal fluid and urine cultures in specific media. Treatment involves a combination of antibiotics and supportive measures.
Assuntos
Leptospirose , Doença de Weil , Animais , Cães , Humanos , América Latina/epidemiologia , Leptospira/classificação , Leptospira/patogenicidade , Leptospirose/diagnóstico , Leptospirose/epidemiologia , Leptospirose/microbiologia , Leptospirose/terapia , Doença de Weil/diagnóstico , Doença de Weil/epidemiologia , Doença de Weil/microbiologia , Doença de Weil/terapiaRESUMO
The adw4 subtype of hepatitis B virus (HBV) belongs to a unique genomic group (genotype F) representing the original HBV strains from the New World. Data regarding the prevalence of this subtype among HBV carriers in South America are, however, scarce, and those concerning HBV genotype F are based on only a few samples from Latin America. In this study, serum samples were obtained from 141 hepatitis B surface antigen (HBsAg) carriers from Amerindians and urban populations from Venezuela. The HBsAg subtype was identified with monoclonal antibodies in 105 samples, and the HBV genotype was identified by reverse-phase hybridization with DNA fragments in 58 samples. The adw4 subtype was highly prevalent in the population studied (75%); among the Amerindians, the prevalence was 97%. The adw2 subtype was also present (10%), while other subtypes (ayw3 and ayw4) were only occasionally found. The HBV subtype was associated with the expected genotype in most cases (80%), and thus genotype F was highly prevalent. Sequencing of viral strains that gave genotypes unpredicted by the HBsAg subtyping confirmed seven of them as belonging to not previously described genotype-subtype associations: namely, adw2 and ayw4 within genotype F.
Assuntos
Variação Antigênica , Antígenos de Superfície da Hepatite B/genética , Vírus da Hepatite B/genética , Hepatite B/virologia , Indígenas Sul-Americanos , Substituição de Aminoácidos , Feminino , Genótipo , Hepatite B/epidemiologia , Hepatite B/etnologia , Antígenos de Superfície da Hepatite B/imunologia , Vírus da Hepatite B/classificação , Vírus da Hepatite B/imunologia , Humanos , Gravidez , Complicações Infecciosas na Gravidez/virologia , Análise de Sequência , Venezuela/epidemiologiaRESUMO
About 100,000 cases of acute hepatitis B virus (HBV) infection occur annually in South America. The overall prevalence of HBV infection in low risk populations ranges from 6.7% to 41%, while hepatitis B surface antigen (HBsAg) rates range from 0.4% to 13%. In high endemicity aboriginal or rural populations, perinatal transmission may play a major part in the spread of HBV. In urban populations, however, horizontal transmission, probably by sexual contact, is the predominant mode of spread, with higher rates of HBV positivity in lower socioeconomic groups. High risk populations such as health care workers and haemodialysis patients show higher rates of HBV infection than comparable populations elsewhere. The risk of posttransfusion hepatitis B remains high in some areas. Concomitant HBV infection may accelerate the chronic liver disease seen in decompensated hepatosplenic schistosomiasis. In the north, the prevalence of hepatitis delta virus (HDV) infection ranks among the highest in the world. In the south, the problem appears negligible although it is increasing within high risk urban communities. HDV superinfection has been the cause of large outbreaks of fulminant hepatitis. The cost of comprehensive or mass vaccination programmes remains unaffordable for most South American countries. Less expensive alternatives such as low dose intradermal schedules of immunisation have been used with success in selected adult subjects.
Assuntos
Hepatite B/epidemiologia , Hepatite D/epidemiologia , Hepatite B/prevenção & controle , Hepatite B/transmissão , Vacinas contra Hepatite B , Humanos , Prevalência , América do Sul/epidemiologiaRESUMO
Preliminary results of a prospective, comparative and randomized study on 119 sero-negative volunteers with increased risk to acquire hepatitis B, aimed to evaluate the comparative efficacy of a recombinant vaccine administered either intramuscularly or intradermally, are discussed. A short vaccination schedule of three consecutive doses given on months 0, 1 and 2 was used. Distribution by sex and age for both groups was similar. Seroconversion and seroprotection rates were comparable (96% and 96% Vs. 98% and 93%, respectively). The geometric mean titre of anti-HBsAg in individuals immunized via I.M. (155 IU/L) was significantly higher to that of the I.D. group (71 IU/L). On the other hand, the rate of good response (> 100 IU/L) was also higher in the I.M. group (67% Vs. 39%). The percentage of good responder in women was consistently higher than in men for both groups (75% Vs. 13%, respectively). In 68 vaccinees, samples were obtained one year later. The levels of anti-HBsAg and the anamnesic response after a booster of the vaccine are currently being assayed.
Assuntos
Vacinas contra Hepatite B/administração & dosagem , Hepatite B/imunologia , Vacinas Sintéticas/administração & dosagem , Adulto , Feminino , Hepatite B/prevenção & controle , Antígenos de Superfície da Hepatite B/administração & dosagem , Vacinas contra Hepatite B/imunologia , Humanos , Esquemas de Imunização , Injeções Intradérmicas , Injeções Intramusculares , Masculino , Estudos Prospectivos , Vacinas Sintéticas/imunologiaRESUMO
In an investigation of a 21-year-old epidemic of severe hepatitis, 80 serum samples were studied from two isolated Yanomami Amerindian populations of the Upper Orinoco basin in Venezuela. Of the assayed samples, 30.6% were positive for hepatitis B surface antigen (HBsAg), 53.7% were considered to reflect immunity to infection with hepatitis B virus (HBV), and only 16.2% were believed to reflect susceptibility to HBV infection; 82.5% of the samples tested positive for any marker of HBV infection. Thirty-one (39.7%) of 78 samples were also positive for antibody to delta antigen, including 91.6% of those positive for HBsAg and 20.9% of those immune to HBV. Our findings provide evidence of a high prevalence of HBV infection in this population. Furthermore, the high prevalence of antibody to delta antigen strongly suggests that coinfections with HBV or superinfections with hepatitis delta virus (HDV) in HBV carriers may be an important factor in the occurrence of an unusually high number of cases of fulminant hepatitis and of chronic liver disease. Serum samples obtained at the beginning of the outbreak 13 years earlier from 36 selected cases in the same population revealed a high rate of HBV infection (96.5%). All six HBsAg carriers from whom enough serum remained to be assayed were positive for antibody to delta antigen. Our findings indicate that the outbreak coincided with the introduction of HDV into a population with an already-high prevalence of HBV infection.
Assuntos
Surtos de Doenças , Hepatite B/complicações , Hepatite D/epidemiologia , Indígenas Sul-Americanos , Adolescente , Adulto , Portador Sadio/epidemiologia , Portador Sadio/etnologia , Criança , Pré-Escolar , Feminino , Hepatite B/epidemiologia , Hepatite B/etnologia , Antígenos de Superfície da Hepatite B/sangue , Hepatite D/complicações , Hepatite D/etnologia , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Prevalência , Venezuela/epidemiologiaRESUMO
To examine whether prior immunity against a carrier protein modulates the serological response to injected peptide haptens attached to the same carrier in man, baseline tetanus antitoxin levels in volunteers who received a malaria sporozoite peptide-tetanus toxoid conjugate vaccine were compared with post-vaccination IgM and IgG antibody titres against the sporozoite antigen. In tetanus-vaccinated North American recipients of low doses of conjugate vaccine there were significant dose-dependent negative correlations between these variables, which suggests that epitopic suppression may occur in man. In contrast, Venezuelans living in non-malarious areas and mostly naive to tetanus toxoid showed a notable IgM response to the sporozoite antigen. The findings indicate that epitopic suppression and immune enhancement occur in man, and that the specific immunological responses to conjugate peptide vaccines may be difficult to predict.
Assuntos
Adjuvantes Imunológicos/administração & dosagem , Proteínas de Transporte/imunologia , Malária/imunologia , Oligopeptídeos/imunologia , Toxoide Tetânico/imunologia , Tétano/imunologia , Vacinas Sintéticas/imunologia , Vacinas/imunologia , Adolescente , Adulto , Idoso , Animais , Anticorpos Antiprotozoários/análise , Epitopos/análise , Feminino , Haptenos/imunologia , Humanos , Imunoglobulina G/análise , Imunoglobulina M/análise , Malária/sangue , Malária/prevenção & controle , Masculino , Maryland , Pessoa de Meia-Idade , Plasmodium/imunologia , Tétano/sangue , Tétano/prevenção & controle , Antitoxina Tetânica/análise , Fatores de Tempo , VenezuelaRESUMO
Lomefloxacin (SC 47111, NY-198) is a recently developed difluorinated quinolone that has been reported to be active against a broad range of both gram-positive and gram-negative pathogens in a number of laboratories around the world. Our laboratory tested the in vitro activity of 451 recent bacterial isolates compared to that of cephradine and gentamicin to define the in vitro spectrum of activity of this compound versus bacterial isolates from Venezuela. Lomefloxacin showed excellent in vitro activity versus Enterobacteriaceae with all isolates inhibited at a concentration of less than or equal to 2 mcg/ml. Lomefloxacin also had significant activity versus the aerobic gram-negative rods tested; the MIC90 for Pseudomonas aeruginosa being 4 mcg/ml. The activity of lomefloxacin versus gram-positive isolates was comparable to that of the gram-negative organisms. The MIC90 for S. aureus, S. epidermidis, and Group D Streptococcus were 1, 0.5 and 4 mcg/ml, respectively. The results of this study confirm the broad spectrum in vitro activity of lomefloxacin seen in earlier studies. Lomefloxacin appears to be active versus a wide variety of both gram-negative and gram-positive isolates including those resistant to cephradine and gentamicin. The excellent in vitro activity of lomefloxacin seen in this study shows that this compound could be a useful addition to currently available antimicrobial agents.
Assuntos
Anti-Infecciosos/farmacologia , Bactérias/efeitos dos fármacos , Fluoroquinolonas , Quinolonas , 4-Quinolonas , Bactérias/isolamento & purificação , Cefradina/farmacologia , Gentamicinas/farmacologia , Humanos , Testes de Sensibilidade Microbiana , VenezuelaRESUMO
Twenty three patients with Cutaneous Larva Migrans syndrome were prospectively treated with 400 mg/day of Albendazole for 3 consecutive days. Clinical response, compliance and tolerance was excellent. Patients were asymptomatic within the first 72 hours of treatment and recurrences did not occurred. Preliminary results with three additional patients suggest that a single oral 400 mg dose may be effective as well.