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1.
Artigo em Inglês | WPRIM (Pacífico Ocidental) | ID: wpr-1036427

RESUMO

@#Introduction: Health and nutrition interventions in developing countries have been linked to better thriving and survival of children. Identifying programmes with significant effect on the nutritional status of Filipino preschool children may aid in identifying impactful interventions in addressing malnutrition. This study evaluated the association between nutritional status of preschool children and government programme participation based on the 2018 Expanded National Nutrition Survey (ENNS) results. Methods: Secondary data analysis of 12,949 preschool children was performed from the 2018 ENNS. The selected data included socioeconomic, anthropometric, and self-reported household-level and individual-level government programme participation. Chi-square test for association and multiple logistic regression were conducted using Stata version 16. Results: Participation in immunisation programme, growth monitoring, household food production, and awareness and usage of iodised salt were negatively associated with at least one type of undernutrition. Consequently, participation in deworming programme was positively associated with both underweight and stunting. Regression analysis showed that preschool children who underwent growth monitoring were less likely to be stunted (OR=0.58), while those who underwent newborn screening were less likely to be underweight (OR=0.53) and stunted (OR=0.62). On the contrary, dewormed children were more likely to be stunted (OR=1.63) and those from 4Ps households were more likely to be wasted (OR=2.24). Conclusion: There is a need to re-evaluate programme strategies to maximise the benefits provided. Programmes showing significant associations with nutritional status including immunisation, growth monitoring, deworming, household food production, and awareness and usage of iodised salt should be continued and sustained with updated policies.

2.
Nutr Health ; 26(3): 231-242, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32513043

RESUMO

BACKGROUND: Nutrition interventions during the early years of a child's life are anchored on the need to provide good nutrition and proper health care to optimize their growth potential as adults. In the Philippines, undernutrition is a persistent problem among 0-10 year old Filipino children. In this age group, children consume a diet poor in quantity and quality. AIM: This study aimed to assess the effects of a school-lunch and nutrition education intervention among schoolchildren in terms of attaining good nutrition. METHOD: Using a quasi-experimental design, children aged 7-9 years from public elementary schools in the province of Laguna, Philippines were categorized into three intervention groups and one non-intervention group. Anthropometric measurements; nutrition knowledge, attitude and behavior; and food intake among children and households were collected at baseline and endline periods. SPSS for Windows version 16 and Stata version 15 were utilized for data analysis. RESULTS: Mean scores on knowledge, attitude and behavior of schoolchildren in intervention groups increased significantly at endline (p<0.05). Protein requirement was met by more children and households than the energy requirement. Most children with normal nutritional status after the interventions (25.3%) belonged to the group with the complete intervention of school-lunch and nutrition education. CONCLUSIONS: The provision of both school-lunch feeding and nutrition education is effective in improving the knowledge, attitude and behavior scores and nutritional status of schoolchildren. The adoption and institutionalization of complete intervention with school-lunch and nutrition education in elementary public schools should be pursued.


Assuntos
Dieta/normas , Serviços de Alimentação , Educação em Saúde , Almoço , Política Nutricional , Instituições Acadêmicas , Adulto , Criança , Feminino , Humanos , Masculino , Pais , Filipinas
3.
J Prim Care Community Health ; 11: 2150132720915407, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32368949

RESUMO

Aims: Undernutrition among 0 to 5 years old children remains a public health problem in the Philippines. This process evaluation study documented and examined the implementation of an intervention strategy for young children. Methods: Complementary feeding of 6-month to 2-year-old children was implemented for 120 days by the municipalities of Plaridel and Pulilan in Bulacan, Philippines utilizing local-based food made of rice and mung bean along with nutrition education classes among mothers/caregivers using the developed nutrition modules. A total of 121 mother-/caregiver-child pairs were the program participants of the intervention. Pre-post design were used in the analysis of quantitative data. Qualitative data were encoded verbatim manually using emerging themes. Key informant interviews among community workers and municipal officials and focus group discussions among mothers/caregivers and community workers were conducted to gather the needed data. Results: The municipalities adhered to the program phases of planning, organizing, implementation, monitoring, and evaluation. At end-line, the weight of children participants increased in both municipalities and the mean nutrition knowledge scores of mothers/caregivers increased significantly (P < .05). Conclusions: This process evaluation confirmed that the proposed nutrition intervention strategy for young children can be implemented at the local level. The strong support and active cooperation of the local program implementers and mothers/caregivers and adherence to program requirements were the key factors in the efficient implementation of the intervention. For sustainability, the passing of local ordinance for the adoption of intervention and budget support for implementation of the intervention is recommended.


Assuntos
Educação em Saúde , Fenômenos Fisiológicos da Nutrição do Lactente , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Mães , Estado Nutricional , Filipinas
4.
Artigo em Inglês | MEDLINE | ID: mdl-25758003

RESUMO

We cared for a neonate with hyperbilirubinemia requiring phototherapy during the birth-hospitalization, at home, and during two subsequent hospital readmissions. Abnormal red blood cell forms including elliptocytes were seen on his blood film but this failed to explain, to our satisfaction, why his jaundice required such prolonged treatment. Next-generation sequencing, using a panel of 27 genes involved in neonatal jaundice and hemolytic anemia revealed four previously described heterozygous variations, which we postulate resulted in increased bilirubin production from hemolysis, plus retarded bilirubin uptake and conjugation. Mutations were found in the erythrocyte membrane protein band 4.1 gene (EPB41), the alpha-spectrin gene (SPTA1), the gene encoding the enzyme for bilirubin conjugation (UGT1A1), and the gene encoding a transporter of bilirubin from the blood into hepatocytes (SLCO1B1).

5.
J Pediatr Surg ; 38(12): 1822-5, 2003 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-14666477

RESUMO

PURPOSE: The aim of this study was to objectively measure recovery time after open and laparoscopic appendectomy using an activity monitor (PAL 1). METHODS: The PAL 1 records the amount of time that the subject is upright (uptime). Children wore the PAL 1 for 10 days continuously, beginning within the first 48 hours postoperatively. RESULTS: Uptime data were collected for 5 or more days for 42 children (open, n = 16; laparoscopic, n = 26). All children had low levels of uptime in the initial postoperative period. There was weak evidence of a quicker recovery rate for children in the laparoscopic group (P =.09). The difference in mean uptime between groups was of statistical significance by day 7 postoperatively with children in the laparoscopic group having a higher mean uptime than those in the open group (difference of 0.7 hours; 95% confidence intervals 0.0 to 1.4 hours in a 24-hour period). CONCLUSIONS: The results of this study show that recovery postappendectomy can be quantified by the measurement of uptime and that children undergoing a laparoscopic procedure may recover marginally more quickly than those undergoing an open procedure.


Assuntos
Apendicectomia/métodos , Atividade Motora , Recuperação de Função Fisiológica , Adolescente , Criança , Humanos , Laparoscopia , Masculino , Monitorização Fisiológica/instrumentação , Período Pós-Operatório , Estudos Prospectivos
6.
Clin Rehabil ; 17(5): 499-503, 2003 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-12952155

RESUMO

OBJECTIVE: To examine variability in 'uptime' (the amount of time spent in the upright position). DESIGN: An observational study. SETTING: The community (i.e., homes and schools in the Melbourne metropolitan area). SUBJECTS: Normal children between 8 and 15 years of age (18 girls and 8 boys). EQUIPMENT: An 'uptimer', a lightweight, battery-operated remote monitor, was used to record uptime. PROCEDURE: Each child in the study wore the uptimer continuously over a 24-hour period, which included a typical day at school, on four separate occasions, one week apart. RESULTS: The variability in repeated measures of uptime in the same child (standard deviation 0.8 hours in 24 hours) was lower than the variability between the children (standard deviation 1.1 hours in 24 hours). We estimate that a single uptime measurement has reliability given by an ICC of 0.65 (95% confidence interval 0.49-0.82), which is calculated by dividing the between-child variability by the total variability (within-child and between-child variability). There were no systematic differences in mean uptime between occasions of measurement. CONCLUSION: As an estimate of the time that a child spends in the upright position, a single 24-hour period of measurement of uptime may vary considerably from one occasion to the next. However, this within-child variability is less than the variability between children. In large-scale field studies a one-off measurement of uptime may be acceptable, but in small rehabilitation studies uptime should be measured on at least three occasions.


Assuntos
Postura , Adolescente , Criança , Feminino , Humanos , Masculino , Reprodutibilidade dos Testes , Fatores de Tempo , Vitória
7.
Dev Med Child Neurol ; 45(3): 189-93, 2003 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-12613776

RESUMO

The 'Uptimer' is a custom-made lightweight battery-operated remote activity monitor that records the amount of time an individual spends in the upright position, which is also known as 'uptime'. The aims of this study were to determine levels of uptime over 24 hours and the relation between uptime and a child's age, sex, height, weight, and body mass index (BMI). Uptime was recorded in 529 normally developing children (318 females, 211 males), aged between 8 and 15 years. All children wore an Uptimer continuously for a 24-hour period that included a typical school day. Mean uptime for children in this study was 5.4 hours (SD 1.3; range 1.5 to 10.3 hours), over a 24-hour period. Uptime followed approximately a normal distribution in this population and did not have a linear relation to age, height, weight, nor BMI. Results of this study may be used as a normative database for the evaluation of uptime in children with physical disabilities.


Assuntos
Desenvolvimento Infantil/fisiologia , Crianças com Deficiência , Postura , Inquéritos e Questionários , Adolescente , Índice de Massa Corporal , Criança , Feminino , Humanos , Masculino , Valores de Referência , Reprodutibilidade dos Testes , Estações do Ano
8.
J Am Mosq Control Assoc ; 18(3): 158-63, 2002 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-12322936

RESUMO

Mosquito catch in New Jersy light traps (NJLTs) has been declining in recent years, compromising the sensitivity of the California mosquito monitoring program. Centers for Disease Control traps (CDCTs) operated without light and augmented with dry ice have been considered for replacement or augmentation. To provide information on comparative sensitivity and ability to measure abundance over time and space, catch of mosquitoes in NJLTs was compared to catch in CDCTs operated concurrently at 8-10 sites within the Coachella Valley, Kern, San Joaquin County, and Sacramento-Yolo Mosquito and Vector Control Districts. The CDCTs always collected more female mosquitoes than did NJLTs; however, differences in sensitivity varied markedly over time and space precluding the calculation of a universal conversion factor. Regressions of the catch of female Culex tarsalis in CDCTs as a function of catch in NJLTs within districts indicated that the slopes varied markedly, again precluding the derivation of a universal function. Therefore, we recommend that mosquito surveillance programs replace or supplement NJLTs with systematically operated CDCTs to enhance sampling sensitivity for females of most mosquito species. However, both trap types should be operated concurrently at several sites within each district to derive regression functions to convert historical relative abundance data from NJLTs to equivalent counts in CDCTs for retrospective analyses.


Assuntos
Culicidae , Aedes , Animais , Anopheles , California , Culex , Feminino , Masculino , Vigilância da População/métodos
9.
CA Cancer J Clin ; 51(3): 153-87; quiz 189-92, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11577495

RESUMO

Many studies have been conducted about dietary interventions aimed at preventing cancer. The American Cancer Society has published guidelines on diet, nutrition and cancer prevention, which are updated periodically as new evidence emerges, and other groups, too, have issued statements or guidelines about nutritional strategies to prevent cancer. Much less is known, however, about optimal nutrition for cancer survivors. This report looks at the different phases of cancer survivorship, from active treatment to advanced disease, and presents existing evidence from which informed decisions can be made regarding dietary choices. Popular complementary and alternative methods related to dietary intervention are reviewed. Nutrition information is also provided according to common cancer sites. As this is an area that requires survivors and health care providers to communicate effectively, a special section on "frequently asked questions" is provided for use as a patient education handout.


Assuntos
Neoplasias/terapia , Fenômenos Fisiológicos da Nutrição , Peso Corporal , Terapias Complementares , Gorduras na Dieta/efeitos adversos , Suplementos Nutricionais , Ingestão de Energia , Exercício Físico , Humanos , Neoplasias/mortalidade , Neoplasias/prevenção & controle , Sobreviventes
10.
J Am Mosq Control Assoc ; 17(2): 118-23, 2001 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-11480818

RESUMO

We compared the cost effectiveness of enzootic arbovirus surveillance in northern California by antibody detection in sentinel chickens, virus isolation from mosquitoes, and antibody detection in wild avian hosts. Total and annual recurring costs were determined for each method based on estimated personnel and actual material and travel costs for biweekly surveillance at 3 sites in the Sacramento Valley from May 1 through mid-October 1997 and 1998. Serologic detection of antibodies in wild birds was the most expensive method. Total costs associated with sentinel chickens and mosquitoes combined were less than half of those for the wild bird program. Recurring annual costs for the wild bird and mosquito methods were only slightly less than expenses for those methods during the 1st year of operation, which included nonrecurring setup costs. Recurring costs for sentinel chickens were reduced approximately 40% from total costs during the 1st year of the program and were <14% of recurring costs for wild bird serology. Exceptions and caveats of our analysis are discussed. When considering data from a companion paper on detection of enzootic virus transmission using the 3 methods, we concluded that the current system that combines sentinel chickens and virus isolation from mosquitoes is the most cost-effective and efficient surveillance program and should be retained. Future research efforts should investigate the costs and surveillance efficiency of modifications in the frequency of specimen collection and the placement of chicken flocks and mosquito traps.


Assuntos
Arbovírus , Animais , Animais Selvagens/virologia , Anticorpos Antivirais , Arbovírus/isolamento & purificação , Aves/virologia , California , Galinhas/virologia , Análise Custo-Benefício , Culicidae/virologia , Insetos Vetores/virologia , Vigilância de Evento Sentinela
11.
Emerg Infect Dis ; 7(3): 451-2, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11384526

RESUMO

A recent case of California encephalitis, a rare mosquito-borne viral disease, represents only the fourth ever reported and the first since the initial three cases in 1945. This case was diagnosed retrospectively on the basis of a rise in antibody titer between acute- and convalescent-phase serum samples.


Assuntos
Encefalite da Califórnia/diagnóstico , Idoso , Anticorpos Antivirais/sangue , Vírus da Encefalite da Califórnia/imunologia , Humanos , Masculino
13.
J Med Entomol ; 37(4): 507-27, 2000 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-10916291

RESUMO

Temporal and spatial changes in the enzootic activity of western equine encephalomyelitis (WEE) and St. Louis encephalitis (SLE) viruses were monitored at representative wetland study sites in the Coachella, San Joaquin, and Sacramento valleys of California from 1996 to 1998 using three methods: (1) virus isolation from pools of 50 host-seeking Culex tarsalis Coquillett females, (2) seroconversions in flocks of 10 sentinel chickens, and (3) seroprevalence in wild birds collected by mist nets and grain baited traps. Overall, 74 WEE and one SLE isolates were obtained from 222,455 Cx. tarsalis females tested in 4,988 pools. In addition, 133 and 40 seroconversions were detected in 28 chicken flocks, and 143 and 27 of 20,192 sera tested from 149 species of wild birds were positive for antibodies to WEE and SLE, respectively. WEE was active in all three valleys, whereas SLE only was detected in Coachella Valley. Seroconversions in sentinel chickens provided the most sensitive indication of enzootic activity and were correlated with seroprevalence rates in wild birds. Avian seroprevalence rates did not provide an early warning of pending enzootic activity in chickens, because positive sera from after hatching year birds collected during spring most probably were the result of infections acquired during the previous season. Few seroconversions were detected among banded recaptured birds collected during spring and early summer. Age and resident status, but not sex, were significant risk factors for wild bird infection, with the highest seroprevalence rates among after hatching year individuals of permanent resident species. Migrants (with the exception of mourning doves) and winter resident species rarely were positive. House finches, house sparrows, Gambel's quail, California quail, common ground doves, and mourning doves were most frequently positive for antibodies. The initial detection of enzootic activity each summer coincided closely with the appearance of hatching year birds of these species in our study areas, perhaps indicating their role in virus amplification. Bird species most frequently positive roosted or nested in elevated upland vegetation, sites where Cx. tarsalis host-seeking females hunt most frequently. These serosurveys provided important background information for planned host competence and chronic infection studies.


Assuntos
Doenças das Aves/virologia , Vírus da Encefalite de St. Louis/isolamento & purificação , Vírus da Encefalite Equina do Oeste/isolamento & purificação , Encefalite de St. Louis/veterinária , Encefalomielite Equina/veterinária , Animais , Animais Selvagens , Doenças das Aves/epidemiologia , Doenças das Aves/imunologia , Aves/virologia , California/epidemiologia , Galinhas , Culex/virologia , Vírus da Encefalite de St. Louis/imunologia , Vírus da Encefalite Equina do Oeste/imunologia , Encefalite de St. Louis/imunologia , Encefalite de St. Louis/virologia , Encefalomielite Equina/epidemiologia , Encefalomielite Equina/imunologia , Encefalomielite Equina/virologia , Feminino , Estudos Soroepidemiológicos
14.
J Med Entomol ; 37(2): 259-64, 2000 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-10730497

RESUMO

Adult house finches from Kern County were inoculated subcutaneously with recent sympatric and allopatric isolates of western equine encephalomyelitis and St. Louis encephalitis (SLE) viruses made from Culex tarsalis Coquillett collected in Kern County and Coachella Valley, CA, respectively. Virulence, as measured by the amplitude of the viremia response during days 1 and 2 postinfection, varied significantly among strains, but independently of geographic origin. The intensity of the immune response, as measured by an enzyme immunoassay and a plaque reduction neutralization test, seemed to be independent of virulence, especially for SLE where some strains failed to produce a detectable viremia but elicited a strong antibody response. Our preliminary data indicated that strain virulence may be associated with the level of enzootic activity during the year of isolation.


Assuntos
Doenças das Aves/virologia , Vírus da Encefalite Equina do Oeste/patogenicidade , Encefalite de St. Louis/veterinária , Encefalomielite Equina/veterinária , Aves Canoras , Animais , Anticorpos Antivirais/imunologia , Doenças das Aves/imunologia , California , Culex/virologia , Vírus da Encefalite de St. Louis/imunologia , Vírus da Encefalite de St. Louis/patogenicidade , Vírus da Encefalite Equina do Oeste/imunologia , Encefalite de St. Louis/imunologia , Encefalite de St. Louis/virologia , Encefalomielite Equina/imunologia , Encefalomielite Equina/virologia , Humanos
15.
J Med Entomol ; 37(2): 250-8, 2000 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-10730496

RESUMO

The effects of method of infection and virus dose on the viremia and antibody responses of 1-wk-old chicks and after-hatching-year house finches to infection with western equine encephalomyelitis (WEE) and St. Louis encephalitis (SLE) viruses were studied under laboratory conditions. Using a capillary tube technique, females from 2 strains of Culex tarsalis Coquillett mosquitoes were estimated to expectorate from 1.0 to 1.7 log10 plaque forming units (PFU) of WEE and from 1.9 to 2.2 log10 PFU of SLE. Based on the proportion of parenterally infected females that transmitted and the number that blood fed during each experiment, virus doses per bird were estimated to be 1.0-1.9 log10 PFU for WEE and 1.4-2.3 log10 PFU for SLE. When infected with comparable doses of WEE by subcutaneous inoculation, there was no significant difference in the duration or magnitude of the viremia response between birds infected by mosquito bite or syringe; few birds developed a viremia response after infection with SLE, precluding analysis. In chickens, increasing the syringe dose of WEE from 0.3 to 1.7 log10 PFU/0.1 ml shortened the time when viremia first appeared from 3 to 1 d postinfection and increased the duration of the viremia period from 1 to 3 d, but did not alter the maximum viremia titer. In house finches, increasing the syringe dose of WEE from 2.6 to 3.3 log10 PFU/0.1 ml did not alter markedly the viremia response. Most birds developed antibody detected by enzyme immunoassay (EIA) or plaque reduction neutralization test (PRNT). In chickens, WEE EIA levels and PRNT titers were higher for birds infected by syringe than by mosquito bite, whereas in house finches the pattern was reversed. For birds infected with SLE, there was overlap among groups infected by mosquito bite or syringe. These results indicate that subcutaneous syringe inoculation provides a biologically sound mode of infection that did not alter viremia and antibody responses when compared with infection by mosquito bite.


Assuntos
Doenças das Aves/virologia , Galinhas , Culex , Vírus da Encefalite Equina do Oeste/patogenicidade , Encefalite de St. Louis/veterinária , Encefalomielite Equina/veterinária , Insetos Vetores , Doenças das Aves Domésticas/virologia , Aves Canoras , Animais , Vírus da Encefalite de St. Louis/patogenicidade , Encefalite de St. Louis/transmissão , Encefalomielite Equina/transmissão , Feminino , Injeções , Mordeduras e Picadas de Insetos
16.
J Med Entomol ; 36(6): 685-94, 1999 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-10593067

RESUMO

An examination of the electrophoretically detectable variation among the North American members of the Aedes (Ochlerotatus) dorsalis group revealed large genetic differences among all 4 species. At least 9 of 18 loci examined (50%) were diagnostic for each species pair. However, morphological variation observed among species was low. Only Aedes canadensis (Theobald) was separated readily from the other members of this group [Aedes dorsalis (Meigen), Aedes melanimon Dyar and Aedes campestris Dyar & Knab] in all life stages. Characters traditionally used to separate the remaining 3 species were less reliable. In the adult female, Ae. melanimon may be distinguished from Ae. campestris by the scaling patterns of the wings and abdomen, but Ae. dorsalis could not be distinguished reliably by these characters. Adults of Ae. dorsalis may be separated reliably from those of Ae. campestris and Ae. melanimon only by the length of the subapical tooth relative to the length of the tarsal claw. Ae. melanimon was identified in the larval stage by the short mesothoracic hair 1. Eight larval characters differed between Ae. dorsalis and Ae. campestris. However, the ranges of these characters overlapped and no character was truly diagnostic. Genetic variation within species was low as measured by average heterozygosity and Nei's genetic distance coefficients. No allozymes were diagnostic for coastal and inland populations of Ae. dorsalis, and the pattern of genetic differentiation within this species did not correspond to the geographic location of the populations examined. Therefore, the genetic data did not support the hypothesis that Ae. dorsalis represents a complex of 2 or more cryptic species.


Assuntos
Aedes/anatomia & histologia , Aedes/genética , Filogenia , Abdome/anatomia & histologia , Aedes/classificação , Animais , Feminino , Variação Genética , Masculino , Estados Unidos , Asas de Animais/anatomia & histologia
17.
J Med Entomol ; 36(1): 23-9, 1999 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-10071489

RESUMO

The genetic structure of 11 populations of Culex tarsalis Coquillett from California and 1 population from Nevada was examined at 18 loci using polyacrylamide gel electrophoresis. Six populations from northern and southern California were sampled repeatedly to determine if the genetic structure of Cx. tarsalis changes seasonally. Significant differences in allele frequencies at 13 different loci were seen in 3 populations over time as determined by contingency chi-square tests. Nei's genetic distance coefficients among different sampling dates was consistently < 0.025. The number of alleles per locus in these populations ranged from 1.6 to 2.7, whereas the average heterozygosity ranged from 0.086 to 0.228. No single locus was found to vary in a consistent pattern within all populations that were sampled repeatedly. These results indicate that Cx. tarsalis populations are genetically stable over time and that temporal variation is due to fluctuations in population size or immigration of genetically distinct individuals. In contrast, Cx. tarsalis did exhibit some differences in genetic structure that were related to geographical features including the Sierra Nevada and the Tehachapi Mountains of southern California. Genetically differentiated populations occurred in Nevada, southern and northeastern California, and the Central Valley of California. Little differentiation was observed among populations located in the Central Valley of California and those located at high elevations in the Sierra Nevada. Thus, in the populations examined, mountain ranges or arid conditions that limit the number of larval development sites appeared to be important barriers to the dispersal of Cx. tarsalis.


Assuntos
Culex/genética , Variação Genética , Animais , California , Culex/classificação
18.
J Am Mosq Control Assoc ; 14(2): 173-7, 1998 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-9673918

RESUMO

Maps of the California and Oregon distribution of members of the Aedes increpitus complex (Aedes clivis Lanzaro and Eldridge, Aedes increpitus Dyar, and Aedes washinoi Lanzaro and Eldridge) are presented that are based on collections reported by Lanzaro and Eldridge (1992) and new collections from various sites, many in the Central Valley of California. Analysis of individually reared specimens by polyacrylamide gel electrophoresis and conventional morphological methods confirmed the diagnostic value of isozymes for these species and of larval head hairs for distinguishing Ae. clivis from other members of the complex. Other larval characters and pupal hairs did not appear to have diagnostic value. An additional site was discovered where apparent hybrids between Ae. washinoi and Ae. increpitus occur, and a single possible hybrid between Ae. washinoi and Ae. clivis was found at a site where these species had previously been reported to occur sympatrically.


Assuntos
Aedes , Animais , California , Oregon
19.
Am J Trop Med Hyg ; 55(2): 185-9, 1996 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-8780458

RESUMO

This paper reports the first isolation of Jamestown Canyon (JC) virus from coastal California and the results of tests for antibody to JC virus in mammals living in coastal California. The virus isolation was made from a pool of 50 Aedes dorsalis females collected as adults from Morro Bay, San Luis Obispo County, California. The virus isolate was identified by two-way plaque reduction-serum dilution neutralization tests done in Vero cell cultures. Sera from the mammals were tested for antibody to JC virus by a plaque-reduction serum dilution neutralization method. A high prevalence of JC virus-specific antibody was found in horses and cattle sampled from Morro Bay. This finding is additional evidence for the presence of a virus antigenically identical or closely related to JC virus in Morro Bay and indicates that the vectors of the virus in Morro Bay feed on large mammals. A high prevalence of virus-specific antibody was also found in horses sampled from Marin and San Diego counties. This finding suggests that viruses antigenically identical or closely related to JC virus are geographically widespread in coastal California.


Assuntos
Vírus da Encefalite da Califórnia/isolamento & purificação , Encefalite da Califórnia/veterinária , Aedes/virologia , Animais , Anticorpos Antivirais/sangue , California/epidemiologia , Bovinos , Doenças dos Bovinos/epidemiologia , Cervos , Doenças do Cão/epidemiologia , Cães , Vírus da Encefalite da Califórnia/imunologia , Encefalite da Califórnia/epidemiologia , Feminino , Doenças dos Cavalos/epidemiologia , Cavalos , Insetos Vetores/virologia , Lagomorpha , Masculino , Testes de Neutralização/veterinária , Peromyscus , Doenças dos Roedores/epidemiologia , Sigmodontinae
20.
Am J Trop Med Hyg ; 54(6): 563-9, 1996 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-8686772

RESUMO

More than 75,000 immature mosquitoes in three genera were collected from coastal California, reared to the adult stage, and tested for virus by plaque assay in Vero cell cultures. Twenty-six strains of Morro Bay (MB) virus, a newly recognized member of the California (CAL) serogroup, were isolated from Aedes squamiger, a pestiferous salt marsh mosquito species restricted to intertidal salt marshes in coastal California and Baja California. The geographic distribution of the isolates was 10 from San Luis Obispo County, one each from Santa Barbara and Orange Counties, and 14 from San Diego County. No virus isolations were made from 23,157 Ae. squamiger collected north of San Luis Obispo County (midpoint in the geographic range of this species in California). Thus, MB virus infection in Ae. squamiger appears to be restricted to the southern range of this species in California. Serum dilution neutralization tests indicated that MB virus represents a novel subtype of the California encephalitis (CE) serotype within the CAL serogroup. Comparative analyses of genomic sequence data from four geographically distinct MB virus isolates indicated that the isolates are genetically similar to each other and distinct from other CE serotype bunyaviruses. Phylogenetic analysis of nucleocapsid protein gene sequence data indicated that MB virus represents a distinct lineage within the CE serotype and thus supports the serologic classification of MB virus as a distinct CAL serogroup virus.


Assuntos
Aedes/virologia , Infecções por Bunyaviridae/veterinária , Genoma Viral , Orthobunyavirus/genética , Animais , Sequência de Bases , Infecções por Bunyaviridae/epidemiologia , Infecções por Bunyaviridae/virologia , California/epidemiologia , Núcleo Celular/genética , Dados de Sequência Molecular , Orthobunyavirus/isolamento & purificação , Filogenia , Prevalência , RNA Mensageiro/genética , RNA Viral/genética , RNA Viral/isolamento & purificação
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