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Muscle spasms and stiffness are key symptoms associated with Tetanus. Tetanus, caused by the Clostridium tetani bacteria, affects the nervous system and leads to painful muscle contractions, particularly affecting the jaw and neck, which is often referred to as "lockjaw." The stiffness can also extend to other muscle groups, causing severe and sometimes life-threatening complications if not treated. Recognizing these symptoms is crucial for early intervention and management. The other symptom sets listed do not pertain to Tetanus, as they reflect conditions more commonly associated with viral infections or other medical issues rather than this specific bacterial infection.