Tetanus Prophylaxis After Dog Bites

Wound Classification and Risk Assessment

Dog bites are classified as "non-clean wounds" that may be contaminated with dirt, saliva, or other materials, requiring appropriate tetanus prophylaxis 1, 2
Animal bites carry a higher risk of tetanus infection due to potential contamination with bacteria 2
The Centers for Disease Control and Prevention (CDC) considers animal bites as wounds that require more aggressive tetanus prophylaxis compared to clean, minor wounds 3, 1

If last tetanus toxoid-containing vaccine was ≥5 years ago: Administer tetanus toxoid-containing vaccine (Tdap or Td) without tetanus immune globulin (TIG), as recommended by the Centers for Disease Control and Prevention (CDC) 3, 2
Administer both tetanus toxoid-containing vaccine AND tetanus immune globulin (TIG) immediately, using separate syringes at different anatomical sites, for individuals with unknown or incomplete vaccination history, as advised by the CDC 1, 4
Begin a complete 3-dose vaccination series if never vaccinated against tetanus, following guidelines from the Centers for Disease Control and Prevention (CDC) 3, 5

For persons aged ≥11 years who have not previously received Tdap or have unknown Tdap history, Tdap is preferred over Td, according to the Centers for Disease Control and Prevention (CDC) 3, 1
For persons with documented previous Tdap vaccination, either Td or Tdap may be used, as recommended by the Centers for Disease Control and Prevention (CDC) 3, 2
Pregnant women requiring tetanus prophylaxis should receive Tdap regardless of prior Tdap history, as advised by the Centers for Disease Control and Prevention (CDC) and the American College of Obstetricians and Gynecologists (ACOG) 3, 1

Persons with HIV infection or severe immunodeficiency who have contaminated wounds should receive TIG regardless of their tetanus immunization history, as recommended by the Centers for Disease Control and Prevention (CDC) 1, 2
Persons with a history of an Arthus reaction following a previous tetanus toxoid-containing vaccine should not receive a tetanus toxoid-containing vaccine until >10 years after the most recent dose, according to the Centers for Disease Control and Prevention (CDC) 6, 2

After receiving Tdap, subsequent booster doses of either Td or Tdap should be administered every 10 years throughout life to ensure continued protection against tetanus and diphtheria, as recommended by the Centers for Disease Control and Prevention (CDC) 3

The American Academy of Pediatrics recommends that patients who have received their last tetanus vaccine less than 5 years ago do not need a tetanus toxoid-containing vaccine or tetanus immune globulin (TIG), as they have adequate protection 7, 8
The Centers for Disease Control and Prevention (CDC) recommends that patients with a history of Arthus reaction following a previous tetanus toxoid-containing vaccine should not receive a tetanus toxoid-containing vaccine until more than 10 years after the most recent dose, even for tetanus prophylaxis as part of wound management 7, 8

The CDC Advisory Committee on Immunization Practices found that administering Tdap at intervals as short as 18 months after prior tetanus-containing vaccines does not increase severe local reactions, based on a Canadian study of 7,001 students aged 7-19 years 7, 8, 9
A study of 4,524 healthcare workers who received Tdap at intervals less than 2 years from prior Td showed comparable rates of adverse events to those with longer intervals, according to the CDC 10

The CDC recommends that vaccination should not be withheld due to concerns about shortened intervals when clinically indicated for wound management, as the benefits outweigh the risks of mild local reactions 8, 10