|
|
|
|
|
| Lima, Mariana G.; Montresor, Lângia C.; Pontes, Joana; Augusto, Ronaldo De C.; Silva, Jairo Pinheiro Da; Thiengo, Silvana C.. |
| Sympatric snail populations have been kept in the laboratory since the isolation of the parasite from the field. To evaluate the influence of the intermediate host in the infectivity of S. mansoni, this allopatric strain was compared to two sympatric strains, from different geographical origins, and with different time of maintenance in the laboratory. Snail–trematode compatibility was accessed for a total of nine possible combinations (three snail populations, three schistosome strains), using different charges of parasite: 1, 5, 10, and 15 miracidia/snail. Each S. mansoni strain was characterized according to its infectivity phenotype that reflects the efficiency of their infection mechanism and all B. glabrata populations were characterized according to... |
| Tipo: Text |
Palavras-chave: Snail-trematode; Host-parasite; Interaction; Compatible; Incompatible; Infectivity; Resistance; Schistosomiasis. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00489/60084/63419.pdf |
| |
|
|
| Teunis, Peter Fm; Le Guyader, Soizick; Liu, Pengbo; Ollivier, Joanna; Moe, Christine L. |
| Noroviruses are a major public health concern: their high infectivity and environmental persistence have been documented in several studies. Genetic sequencing shows that noroviruses are highly variable, and exhibit rapid evolution. A few human challenge studies have been performed with norovirus, leading to estimates of their infectivity. However, such incidental estimates do not provide insight into the biological variation of the virus and the interaction with its human host. To study the variation in infectivity and pathogenicity of norovirus, multiple challenge studies must be analysed jointly, to compare their differences and describe how virus infectivity and host susceptibility vary. Since challenge studies can only provide a small sample of the... |
| Tipo: Text |
Palavras-chave: Challenge studies; Infectivity; Natural experiments; Norovirus; Multilevel dose response. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00641/75265/75474.pdf |
| |
|
| |
|
| |
|
| |
|
|
| Farooq,Muzammil; Freed,Shoaib. |
| Abstract The housefly Musca domestica is a worldwide insect pest that acts as a vector for many pathogenic diseases in both people and animals. The present study was conducted to evaluate the virulence of different local isolates of Beauveria bassiana, Metarhizium anisopliae and Isaria fumosorosea on M. domestica using two bioassay techniques: (1) adult immersion and (2) a bait method applied to both larvae and adults. The results showed evidence of a broad range of responses by both stages (larvae and adults) to the tested isolates of B. bassiana, M. anisopliae and I. fumosorosea. These responses were concentration-dependent, with mortality percentages ranging from 53.00% to 96.00%. Because it resulted in lower LC50 values and a shorter lethal time, B.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Entomopathogenic fungi; Fecundity; Housefly; Infectivity; Pathogen; Vector. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000400807 |
| |
|
|
|
