North American Veterinary Licensing Examination (NAVLE) Practice Test

In the context of tetanus, it is important to understand the typical clinical signs that animals exhibit when affected by the disease. Tetanus is caused by the toxin produced by the bacterium Clostridium tetani. The hallmark symptoms of tetanus include muscle rigidity, spasms, and stiffness.

Symptoms such as drooling, swollen limbs, and an extended neck are all consistent with tetanus. Drooling occurs due to the difficulty in swallowing and muscle spasms affecting the jaw. Swollen limbs can result from muscle contractions and the inflammation associated with the disease. The extended neck, or "sawhorse" posture, is a classic sign where the animal holds its neck stiffly and extended due to muscle rigidity.

Increased appetite, however, does not align with the symptoms of tetanus. In fact, animals suffering from tetanus often experience distress and a decreased ability to eat due to muscle contractions and the pain associated with the condition. Therefore, this symptom is not typical for tetanus and sets it apart from the other symptoms listed.