What form of sentinel surveillance is frequently used in veterinary medicine?

• A. Genetic surveillance of pathogens
• B. Using sentinel species to detect outbreaks
• C. Random population sampling
• D. Environmental monitoring only

Answer: (B)

Using sentinel species to detect outbreaks is a practical form of sentinel surveillance in veterinary medicine. These sentinel animals or herds are chosen because they’re likely to reflect exposure to a pathogen early, so they’re monitored for infection, seroconversion, or illness. This approach provides an early warning that a pathogen is circulating in the area, and it’s cost-effective and targeted—monitoring a small, selected group can signal trouble before it spreads to the broader population. Classic examples include sentinel birds or mammals placed in a region to detect arboviruses or sentinel poultry used to watch for influenza-like diseases in poultry populations. In contrast, genetic surveillance focuses on the pathogen’s characteristics rather than a live indicator population, random population sampling spreads resources across the whole population without a built-in early warning signal, and environmental monitoring alone may miss infections that don’t immediately produce environmental cues.