If a cut is made by an iron that is not rusty and the wound is shallow and large, you usually do not get tetanus. If the patient develops a deep, narrow wound, it is possible to get tetanus.
Clostridium tetani is an anaerobic bacterium that needs to survive for minutes in an oxygen-poor environment. If the wound is not deep and narrow and is made by an unrusted iron, you will not get tetanus because the wound area is an aerobic environment that is not conducive to the growth of Clostridium tetani.
If the wound is deep and narrow when cut by an iron that is not rusty, tetanus may occur because the wound may be infected with natural Clostridium tetani, and a deep and narrow wound provides an oxygen-poor environment suitable for the growth of Clostridium tetani.
It is recommended that patients who have been cut by non-rusty iron should seek prompt medical attention. The doctor will determine whether the wound is tetanus-inducing based on the condition of the wound and take appropriate treatment measures.