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Biologics Regulation and ResearchThe People and Work of Buildings 29 & 29A

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Tetanus is an acute, often fatal, disease caused by an exotoxin produced by the bacterium Clostridium tetani. Exotoxins are toxins released by a living bacterial cell into its surroundings. Symptoms of tetanus include generalized rigidity and convulsive spasms of skeletal muscles. The muscle stiffness usually begins in the jaw (lockjaw) and neck and then becomes more generalized throughout the body.

Although records from antiquity (fifth century BCE) contain clinical descriptions of tetanus, it was in 1884 when tetanus was first produced in animals by injecting them with pus from a fatal human tetanus case. During that same year, tetanus was produced in animals by injecting them with samples of soil.

In 1889, Kitasato Shibasaburo isolated the organism from a human, showed that it produced disease when injected into animals, and reported that the toxin could be neutralized by specific antibodies. In 1897, Edmond Nocard demonstrated the protective effect of passively transferred antitoxin, and passive immunization in humans was used for treatment and prevention during World War I. A method for inactivating tetanus toxin with formaldehyde was developed in the early 1920s. This led to the development of tetanus toxoid in 1924, which was first widely used during World War II.

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A vial of tetanus antitoxin and the dried antiserum are held up in someone's hands.

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A package of ca. 1907 dried antitetanic serum, at left, compared to a vial of tetanus antitoxin ca. 1970–1980, at right.

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National Library of Medicine

At the National Institutes of Health (NIH), Dr. M. Carolyn Hardegree worked with Dr. Margaret Pittman and Dr. Michael Barile on tetanus toxoids studies in humans and guinea pigs. They published the paper “Immunization Against Neonatal Tetanus in New Guinea” in 1970 along with their colleagues F.D. Schofield, R. Maclennan, and A. Kelly. Their paper is a continuation of a study reported in 1965 of tetanus antitoxin titers among women after primary immunization plain AIPO(4)-adsorbed or oil adjuvant toxoids. The paper also looks at the effects of age and of abscess formation due to oil adjuvants on antitoxin response and is a comparative study of titers in some women of the study groups who received either a plain or an AlPO(4) toxoid booster injection in pregnancy. The results support the previous recommendation to use aluminum adjuvant toxoid in the prevention of neonatal tetanus. This paper was important because at that time, there was much interest in the use of mineral oil in allergens and other products.  The Division of Biologics Standards (DBS) initiated a series of studies under contract to evaluate safety. The final DBS report indicated that the use of mineral oil adjuvants in the human population may be hazardous and should not be recommended for general use in humans.

In 1948, the tetanus vaccine became available in a combined vaccine (DTP) with diphtheria toxoid and the pertussis vaccine.

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