RESUMEN
Chlamydia gallinacea is a recently described bacterial species in a genus known to infect and cause disease in animals and humans. Our report describes the identification of C. gallinacea infection in free-range laying chickens (Gallus gallus) in Australia, and the identification of C. gallinacea infection in a parrot, a wild Australian galah (Eolophus roseicapillus). There is currently little knowledge of the effects of C. gallinacea infection on avian hosts, but it has been linked to respiratory disease in humans and could potentially cause similar disease in other species. Our report highlights the need for further study and surveillance of Chlamydia species in both wild and domestic hosts in Australia.
Asunto(s)
Enfermedades de las Aves/epidemiología , Enfermedades de las Aves/microbiología , Infecciones por Chlamydia/veterinaria , Chlamydia/aislamiento & purificación , Crianza de Animales Domésticos , Animales , Australia/epidemiología , Proteínas de la Membrana Bacteriana Externa/aislamiento & purificación , Pollos , Chlamydia/genética , Infecciones por Chlamydia/epidemiología , Infecciones por Chlamydia/microbiología , Femenino , Humanos , Loros , Enfermedades de las Aves de Corral , Victoria/epidemiologíaRESUMEN
Zebra finches have previously been found to have preferences for particular colours of both natural and artificial traits among opposite sex conspecifics. For example, in some studies female zebra finches preferred males wearing red leg bands to orange-banded and unbanded birds and rejected light green-banded males. In other studies, females also preferred males with red beaks to orange-beaked males. However, several authors have failed to replicate these results. We show that females may fail to show a colour preference because of the absence or removal of ultraviolet light under experimental conditions. In mate-choice trials, females observing males through filters that transmitted ultraviolet preferred red-banded males but where females viewed males through ultraviolet-blocking filters, no such preference was observed. Further investigation revealed that the lack of a colour preference when ultraviolet was absent was probably due to the change in overall appearance of the bird, rather than the change in appearance of the rings themselves. This work highlights the importance of proper consider-ation of the sensory capabilities of animals in experimental design, particularly with regard to the role of ultraviolet light in avian colour perception.Copyright 1997 The Association for the Study of Animal BehaviourCopyright 1997The Association for the Study of Animal Behaviour.