Arbovirus Catalog

Browse the Catalog

ArboCat Home

History
Abbreviations
Information Exchange

Virus Name: Fort Morgan

Abbreviation: FMV

Status
Arbovirus

Select Agent
No

SALS Level
2

SALS Basis
Results of SALS surveys and information from the Catalogue.

Other Information

Antigenic Group
A

Section IX - Experimental Arthropod Infection and Transmission

Arthropod species & virus source(a)	Method of Infection log10/ml (b)		Incubation period (c)		Transmision by bite (d)		Assay of arthropod, log10/ml (e)
	Feeding	Injected	Days	°C	Host	Ratio	Whole	Organ	System


O. vicarius bugs fed on suspensions of Fort Morgan virus containing 4.5-6.9 logs were shown to contain virus after up to 312 days. Infected bugs transmitted the virus after 33 and 47 days incubation to nestling sparrows. Infection and transmission was demonstrated after 234 and 312 days incubation in bugs held at temperatures simulating hibernation.
Culex tarsalis and Cx pipiens pipiens fed on virus (suspensions and viremic hosts) and held for 9-23 days at 22-24C contained no detectable virus. Minimal levels (1-1.3 dex PFU/ml) were detected in a small proportion of the mosquitoes after intrathoracic inoculation of virus.
Culiseta melanura and Cs inornata did not become infected after oral feeding (pledget suspensions, 6.3 dex/ml) but following intrathoracic inoculation apparent replication to higher levels than in Culex mosquitoes was observed.

<<<Click on the PDF icon to the left to view a copy of this virus entry in PDF format.
You can get a copy of the PDF viewer by clicking here.