126 A 2-year-old male Poodle cross dog lives on a small dairy farm that has experienced recent losses of some stock. He presents with a complaint of forelimb stiffness/lameness. On physical examination, you note that the left forelimb is extended and non-painful (Figure 126.1). A puncture wound is apparent on the left side of the neck, just cranial to the position of the superficial cervical lymph node (Figure 126.2). https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429401725/fe6fa303-c714-41e4-95cc-94c10c7f2fd1/content/fig126_1_C.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/> https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429401725/fe6fa303-c714-41e4-95cc-94c10c7f2fd1/content/fig126_2_C.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/>

i. What are the two different types of tetanus toxin and how do they differ in effects?

ii. Name some other classical clinical signs of tetanus in dogs.

iii. Would you recommend vaccinating this dog against tetanus? Why don’t we routinely vaccinate dogs against this disease?