Which host category is typically associated with signaling the presence of FMD without driving large-scale transmission?

Which host category is typically associated with signaling the presence of FMD without driving large-scale transmission?

• A. Amplifying hosts
• B. Indicator hosts
• C. Maintenance hosts
• D. Sentinel hosts

Answer: (B)

In FMD dynamics, not every host drives the big spread; some mainly signal that the virus is present. Indicator hosts become infected and can reveal circulating virus through detectable infection or shedding, but their role in onward transmission is limited. Their infections flag active transmission in the area, providing an early warning that prompts closer surveillance and control efforts. This contrasts with amplifying hosts, which shed large amounts of virus and sustain rapid transmission; maintenance hosts that keep the virus circulating in a region; and sentinel hosts, which are monitored to detect disease presence. Therefore, the best choice is indicator hosts.

In FMD dynamics, not every host drives the big spread; some mainly signal that the virus is present. Indicator hosts become infected and can reveal circulating virus through detectable infection or shedding, but their role in onward transmission is limited. Their infections flag active transmission in the area, providing an early warning that prompts closer surveillance and control efforts. This contrasts with amplifying hosts, which shed large amounts of virus and sustain rapid transmission; maintenance hosts that keep the virus circulating in a region; and sentinel hosts, which are monitored to detect disease presence. Therefore, the best choice is indicator hosts.