Noticias Noticias

Mosquitoes are attracted to Plasmodium-infected birds

Parasites can manipulate their hosts to increase their transmission success. Avian malaria parasites (Plasmodium) are thought to alter the cues such as host odour, used by host-seeking mosquitoes. Bird odour is affected by secretions from the uropygial gland and may play a role in modulating vector-host interactions. The hypothesis tested was  that mosquitoes are more attracted to the uropygial secretions and/or whole-body odour (headspace) of Plasmodium-infected house sparrows (Passer domesticus) than to those of uninfected birds. The attraction of nulliparous (e.g. uninfected mosquitoes without previous access to blood) Culex pipiens females towards these stimuli was tested in a dual-choice olfactometer. Gas Chromatography-Mass Spectrometry (GC–MS) analyses were used to assess whether Plasmodium infection is associated with differences in the chemical composition of uropygial secretions. Mosquitoes were more attracted to the odours of infected than uninfected birds, regardless of sex. However, the significant interaction between infection status and the stimuli (uropygial secretion or headspace) showed that mosquitoes were more attracted to the headspace of infected birds; no differences were found in the case of uropygial secretions. The compounds in the volatile lipophilic fraction of the uropygial secretion did not differ between infected and uninfected birds. These results support the host manipulation hypothesis since avian Plasmodium parasites may be capable of altering their host's body odour, thereby making infected individuals more attractive to mosquitoes. informacion[at]ebd.csic.es: Díez-Fernández et al (2020) Mosquitoes are attracted by the odour of Plasmodium-infected birds. International J Parasitology. DOI 10.1016/j.ijpara.2020.03.013


https://www.sciencedirect.com/science/article/pii/S0020751920301193
Promedio (0 Votos)

Últimas noticias Últimas noticias

Impacto de la pesca sobre las tortugas marinas

La captura accidental de tortugas marinas por parte de la pesca industrial está recibiendo una atención creciente en los últimos años debido al gran impacto sobre estas especies amenazadas. Esta...

La estructura de las redes de dispersión de semillas por aves acuáticas no está mediada por rasgos funcionales

La frugivoría es un proceso de vital importancia para la dispersión de muchas plantas, pero las interacciones de dispersión entre plantas y animales no frugívoros, como las aves acuáticas, están...

Aves infectadas por malaria atraen más a los mosquitos

En este estudio se ha comprobado que a los mosquitos les atrae más el olor de aquellas aves que ya están infectadas por protozoos del género Plasmodium, causante de la enfermedad de la malaria en...

La hormiga argentina es una seria amenaza para los anfibios

La hormiga argentina tiene efectos negativos muy potentes sobre algunos anfibios de Doñana, llegando incluso a ser letal para ellos. Esta especie de hormiga, cuyo rango nativo es la cuenca del...