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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
14/12/1999 |
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Data da última atualização: |
12/07/2023 |
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Autoria: |
SPENCER, R. R.; PARKER, R. R. |
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Título: |
Rocky mountain spotted fever: infectivity of fasting and recently fed ticks. |
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Ano de publicação: |
1923 |
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Fonte/Imprenta: |
Public Health Report, v. 38, n. 8, p. 333-339, Feb., 1923. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract : A careful series of experiments with healthy guineapigs was carried out to determine the relative values of inoculation of the macerated tick contents and feeding as a means of conveying Rocky Mountain fever. The criterion of infection was the development of the disease in the animal, or causation of immunity. The results showed that it was unwise to rely either on feeding or inoculation alone, but the latter method is reliable if tested with recently fed ticks, that is, when the virus has been " reactivated." An infected fed tick contains virulent fever-producing virus, while the unfed infected ticks contain a non-virulent immunity-producing virus. This fact explains the comparatively small number of human cases, and the long period of attachment which is usually necessary to cause infection. It also suggests the possibility that the virus may sometimes die out in the tick when unfed for long periods, " reactivation " by ingestion of blood not having taken place. The same loss of virulence occurs in infected eggs which have been dried for four months; these when injected will give rise to immunity but not to fever. P. W. B-S. |
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Palavras-Chave: |
Experimental infection; Experimental transmission; Infectivity; Metastigmata; Tickborne diseases. |
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Thesagro: |
Alimentação; Carrapato; Febre; Infecção. |
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Thesaurus Nal: |
Animal disease models; Animal models; Guinea pigs; Human diseases; Rocky Mountain spotted fever; Virulence. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02020naa a2200313 a 4500
001 1524055
005 2023-07-12
008 1923 bl uuuu u00u1 u #d
100 1 $aSPENCER, R. R.
245 $aRocky mountain spotted fever$binfectivity of fasting and recently fed ticks.
260 $c1923
520 $aAbstract : A careful series of experiments with healthy guineapigs was carried out to determine the relative values of inoculation of the macerated tick contents and feeding as a means of conveying Rocky Mountain fever. The criterion of infection was the development of the disease in the animal, or causation of immunity. The results showed that it was unwise to rely either on feeding or inoculation alone, but the latter method is reliable if tested with recently fed ticks, that is, when the virus has been " reactivated." An infected fed tick contains virulent fever-producing virus, while the unfed infected ticks contain a non-virulent immunity-producing virus. This fact explains the comparatively small number of human cases, and the long period of attachment which is usually necessary to cause infection. It also suggests the possibility that the virus may sometimes die out in the tick when unfed for long periods, " reactivation " by ingestion of blood not having taken place. The same loss of virulence occurs in infected eggs which have been dried for four months; these when injected will give rise to immunity but not to fever. P. W. B-S.
650 $aAnimal disease models
650 $aAnimal models
650 $aGuinea pigs
650 $aHuman diseases
650 $aRocky Mountain spotted fever
650 $aVirulence
650 $aAlimentação
650 $aCarrapato
650 $aFebre
650 $aInfecção
653 $aExperimental infection
653 $aExperimental transmission
653 $aInfectivity
653 $aMetastigmata
653 $aTickborne diseases
700 1 $aPARKER, R. R.
773 $tPublic Health Report$gv. 38, n. 8, p. 333-339, Feb., 1923.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
10/11/2014 |
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Data da última atualização: |
10/10/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
GOMIDE, R. L.; BORATTO, I. M. de P. |
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Afiliação: |
REINALDO LUCIO GOMIDE, CNPMS. |
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Título: |
Evapotranspiration and energy balance components spatial distribution in the north region of Minas Gerais, Brazil, using the SEBAL model and Landsat 5 TM images. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: REMOTE SENSING FOR AGRICULTURE, ECOSYSTEMS, AND HYDROLOGY, 16., 2014, Amsterdam. Proceedings... Bellingham: SPIE, 2014. p. 1-14. |
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Série: |
(Proceedings of SPIE , v. 9239). |
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DOI: |
10.1117/12.2067370 |
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Idioma: |
Inglês |
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Conteúdo: |
The determination of crop evapotranspiration (ETc) values is very useful information for planning irrigation, water supply estimation, regulation of water rights and river basins hydrologic studies. Values of ETc in the North region of Minas Gerais state, Brazil, were estimated in this research from the multispectral images of the Landsat 5 TM by means of the model Surface Energy Balance Algorithm for Land- SEBAL, based on the simplified energy balance equation of a surface covered by vegetation, using a few daily surface climatological parameters (wind speed, rainfall, air temperature and relative humidity, solar radiation). The aim of this study was to estimate the regional spatial distribution of the energy balance components and evapotranspiration in the study area, covering the irrigated perimeter of Gorutuba, involving the cities of Nova Porteirinha, Janaúba, Porteirinha, Verdelândia and Pai Pedro. Thematic maps of regional evapotranspiration and energy balance components were generated from spectral analyzes of the images obtained, associated with the used weather data. The ability of SEBAL to provide the spatial variability of energy balance components, including evapotranspiration, demonstrated its sensitivity to different occupation of the soil surface vegetation, and to high data temporal and spatial resolutions data, indicating that the SEBAL model can be used in scales and operational routine for north region of Minas Gerais. |
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Palavras-Chave: |
Escala regional; Modelagem; Modeling. |
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Thesagro: |
Irrigação; Manejo de água; Recurso hídrico. |
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Thesaurus NAL: |
Models; Water management; water resources. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02394naa a2200265 a 4500
001 1999599
005 2017-10-10
008 2014 bl uuuu u00u1 u #d
024 7 $a10.1117/12.2067370$2DOI
100 1 $aGOMIDE, R. L.
245 $aEvapotranspiration and energy balance components spatial distribution in the north region of Minas Gerais, Brazil, using the SEBAL model and Landsat 5 TM images.$h[electronic resource]
260 $c2014
490 $a(Proceedings of SPIE , v. 9239).
520 $aThe determination of crop evapotranspiration (ETc) values is very useful information for planning irrigation, water supply estimation, regulation of water rights and river basins hydrologic studies. Values of ETc in the North region of Minas Gerais state, Brazil, were estimated in this research from the multispectral images of the Landsat 5 TM by means of the model Surface Energy Balance Algorithm for Land- SEBAL, based on the simplified energy balance equation of a surface covered by vegetation, using a few daily surface climatological parameters (wind speed, rainfall, air temperature and relative humidity, solar radiation). The aim of this study was to estimate the regional spatial distribution of the energy balance components and evapotranspiration in the study area, covering the irrigated perimeter of Gorutuba, involving the cities of Nova Porteirinha, Janaúba, Porteirinha, Verdelândia and Pai Pedro. Thematic maps of regional evapotranspiration and energy balance components were generated from spectral analyzes of the images obtained, associated with the used weather data. The ability of SEBAL to provide the spatial variability of energy balance components, including evapotranspiration, demonstrated its sensitivity to different occupation of the soil surface vegetation, and to high data temporal and spatial resolutions data, indicating that the SEBAL model can be used in scales and operational routine for north region of Minas Gerais.
650 $aModels
650 $aWater management
650 $awater resources
650 $aIrrigação
650 $aManejo de água
650 $aRecurso hídrico
653 $aEscala regional
653 $aModelagem
653 $aModeling
700 1 $aBORATTO, I. M. de P.
773 $tIn: REMOTE SENSING FOR AGRICULTURE, ECOSYSTEMS, AND HYDROLOGY, 16., 2014, Amsterdam. Proceedings... Bellingham: SPIE, 2014. p. 1-14.
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Embrapa Milho e Sorgo (CNPMS) |
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