Pathogenesis and midgut histopathology of Bacillus thuringiensis in Simulium vittatum (Diptera: Simuliidae)
The pathogenesis and midgut histopathology which resulted when larvae of the blackfly, Simulium vittatum, were exposed to Bacillus thuringiensis at various temperatures and periods of exposure were investigated. The onset of mortality was studied at 10°, 15°, 19°, and 24°C. For each 4-5°C increase i...
| Autor principal: | Lacey, Lawrence A. |
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| Outros Autores: | Federici, Brian A. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Journal of Invertebrate Pathology
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/19750 |
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oai:repositorio:1-19750 |
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dspace |
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oai:repositorio:1-19750 Pathogenesis and midgut histopathology of Bacillus thuringiensis in Simulium vittatum (Diptera: Simuliidae) Lacey, Lawrence A. Federici, Brian A. Animals Experiment Arthropod Bacillus Thuringiensis Pest Control, Biological Digestive System Prevention Simulium Vector Control The pathogenesis and midgut histopathology which resulted when larvae of the blackfly, Simulium vittatum, were exposed to Bacillus thuringiensis at various temperatures and periods of exposure were investigated. The onset of mortality was studied at 10°, 15°, 19°, and 24°C. For each 4-5°C increase in temperature above 15°C, the onset of mortality was shortened by 24 hr. Exposures as brief as 15 min to 10 ppm of a whole spore preparation resulted in an average mortality of 29% in late-instar larvae. Mortality increased sharply for exposures up to 3 hr, approaching a maximum of 80%. The gross signs of disease included cessation of feeding and tetany with brachytosis. The tissue most affected was the midgut epithelium in the regions of the gastric caeca and posterior stomach. The formation of cytoplasmic vacuoles followed by cell lysis and/or sloughing were very apparent in moribund larvae. Death resulted without bacteremia. © 1979. 2020-06-15T22:12:27Z 2020-06-15T22:12:27Z 1979 Artigo https://repositorio.inpa.gov.br/handle/1/19750 10.1016/0022-2011(79)90150-2 en Volume 33, Número 2, Pags. 171-182 Restrito Journal of Invertebrate Pathology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Animals Experiment Arthropod Bacillus Thuringiensis Pest Control, Biological Digestive System Prevention Simulium Vector Control |
| spellingShingle |
Animals Experiment Arthropod Bacillus Thuringiensis Pest Control, Biological Digestive System Prevention Simulium Vector Control Lacey, Lawrence A. Pathogenesis and midgut histopathology of Bacillus thuringiensis in Simulium vittatum (Diptera: Simuliidae) |
| topic_facet |
Animals Experiment Arthropod Bacillus Thuringiensis Pest Control, Biological Digestive System Prevention Simulium Vector Control |
| description |
The pathogenesis and midgut histopathology which resulted when larvae of the blackfly, Simulium vittatum, were exposed to Bacillus thuringiensis at various temperatures and periods of exposure were investigated. The onset of mortality was studied at 10°, 15°, 19°, and 24°C. For each 4-5°C increase in temperature above 15°C, the onset of mortality was shortened by 24 hr. Exposures as brief as 15 min to 10 ppm of a whole spore preparation resulted in an average mortality of 29% in late-instar larvae. Mortality increased sharply for exposures up to 3 hr, approaching a maximum of 80%. The gross signs of disease included cessation of feeding and tetany with brachytosis. The tissue most affected was the midgut epithelium in the regions of the gastric caeca and posterior stomach. The formation of cytoplasmic vacuoles followed by cell lysis and/or sloughing were very apparent in moribund larvae. Death resulted without bacteremia. © 1979. |
| format |
Artigo |
| author |
Lacey, Lawrence A. |
| author2 |
Federici, Brian A. |
| author2Str |
Federici, Brian A. |
| title |
Pathogenesis and midgut histopathology of Bacillus thuringiensis in Simulium vittatum (Diptera: Simuliidae) |
| title_short |
Pathogenesis and midgut histopathology of Bacillus thuringiensis in Simulium vittatum (Diptera: Simuliidae) |
| title_full |
Pathogenesis and midgut histopathology of Bacillus thuringiensis in Simulium vittatum (Diptera: Simuliidae) |
| title_fullStr |
Pathogenesis and midgut histopathology of Bacillus thuringiensis in Simulium vittatum (Diptera: Simuliidae) |
| title_full_unstemmed |
Pathogenesis and midgut histopathology of Bacillus thuringiensis in Simulium vittatum (Diptera: Simuliidae) |
| title_sort |
pathogenesis and midgut histopathology of bacillus thuringiensis in simulium vittatum (diptera: simuliidae) |
| publisher |
Journal of Invertebrate Pathology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/19750 |
| _version_ |
1787143202040446976 |
| score |
11.674684 |