What term refers to the observable symptoms indicating the presence of disease in animals?

The term that refers to the observable symptoms indicating the presence of disease in animals is "clinical signs." Clinical signs are the manifestations of a disease that can be detected and identified through observation and examination. These symptoms can vary significantly depending on the type of disease and can include changes in behavior, physical appearance, or physiological functions, such as fever, coughing, or diarrhea.

Understanding clinical signs is crucial for veterinarians and animal health professionals, as they help establish a diagnosis and determine the course of treatment. Observing these signs allows for timely intervention, which can improve outcomes in affected animals.

In contrast, the other terms do not accurately describe observable symptoms of disease. Incubation periods refer to the time interval between exposure to a pathogen and the onset of symptoms, rather than the symptoms themselves. Asymptomatic indicators are used to describe conditions where a disease is present without producing observable symptoms, which contrasts with the concept of clinical signs. Lastly, diagnostic tests involve laboratory procedures designed to identify specific pathogens or conditions rather than the visible symptoms that an animal may exhibit.