| test of recrudescence hypothesis for overwintering of west nile virus in gray catbirds. | west nile virus is a pathogen of concern for both human and wildlife health. although many aspects of the ecology of west nile virus are well understood, the mechanisms by which this and similar mosquito-borne viruses overwinter and become reinitiated each spring in temperate regions is not known. a thorough understanding of this mechanism is crucial to risk assessment and development of control strategies. one of the hypotheses to explain the mechanism by which this virus persists from year to ... | 2010 | 20496593 |
| abundance and temporal distribution of ornithonyssus sylviarum canestrini and fanzago (acarina: mesostigmata) in gray catbird (dumatella carolinensis) nests. | the northern fowl mite, ornithonyssus sylviarum canestrini and fanzago, is a common ectoparasite of wild birds. despite its ability to transmit eastern equine encephalitis (eee) virus under laboratory conditions and potential for involvement in the natural eee virus cycle, we know little about its abundance or temporal distribution in nature. from june to august 2000, we studied the abundance of o. sylviarum in the nests of gray catbirds (dumatella carolinensis), a reservoir host for eee virus, ... | 2004 | 15266741 |
| seroprevalence of eastern equine encephalomyelitis virus in birds and larval survey of culiseta melanura coquillett during an interepizootic period in central ohio. | from june through august in 1999 and 2000, we conducted an avian serosurvey for eastern equine encephalomyelitis (eee) virus at killbuck marsh wildlife area (kmwa), a focus of infection in central ohio. we also monitored abundance of the suspected enzootic vector, culiseta melanura coquillett, in brown's lake bog, an adjacent wetland. of the 363 birds of 30 species sampled in 1999, three gray catbirds (dumetella carolinensis) were positive for antibodies to eee virus, representing 1.2% of the av ... | 2004 | 15266743 |
| patterns of haemoproteus beckeri parasitism in the gray catbird (dumatella carolinensis) during the breeding season. | we determined the prevalence and intensity of blood parasites in breeding gray catbirds (dumatella carolinensis) at killbuck wildlife area in wayne and holmes counties, ohio (usa) from june through august 2000. of 98 catbirds sampled, 40 (40.8%) had detectable infections of haemoproteus beckeri. overall prevalence of h. beckeri in this population is high relative to that reported in earlier blood parasite surveys of both breeding and migrant catbirds. mean intensity of h. beckeri infection did n ... | 2003 | 14567219 |
| test of recrudescence hypothesis for overwintering of eastern equine encephalomyelitis virus in gray catbirds. | eastern equine encephalitis virus (eeev; family togaviridae, genus alphavirus) epizootics are infrequent, but they can lead to high mortality in infected horses and humans. despite the importance of eeev to human and animal health, little is known about how the virus overwinters and reinitiates transmission each spring, particularly in temperate regions where infected adult mosquitoes are unlikely to survive through the winter. one hypothesis to explain the mechanism by which this virus persists ... | 2011 | 21845951 |
| volatile and semivolatile compounds in gray catbird uropygial secretions vary with age and between breeding and wintering grounds. | the uropygial secretions of some bird species contain volatile and semivolatile compounds that are hypothesized to serve as chemical signals. the abundance of secretion components varies with age and season, although these effects have not been investigated in many species. we used solid-phase microextraction headspace sampling and solvent extraction coupled with gas chromatography-mass spectrometry to detect and identify volatile and semivolatile chemical compounds in uropygial secretions of gr ... | 2011 | 21424249 |