Complications of tetanus vaccination

Preparation characteristics and administration schedule

The main tool for protection against tetanus infection is a combined preparation — DTaP. Its structure includes toxoids (diphtheria and tetanus), which are fixed on a special sorbent. Aluminum hydroxide is used as such a carrier.

Special attention is paid to the pertussis component. It is represented by killed whole microbial cells of the pathogen B. pertussis (strictly phase I). To deprive the bacteria of pathogenicity while preserving their immunogenic properties, an inactivation procedure is performed. Thermal exposure (heating) or chemical treatment with merthiolate is used for this.

The process of immunity formation requires strict adherence to time intervals. The standard immunization schedule starts when the child turns three months old. The course consists of three sequential administrations of the preparation. A pause lasting from four to six weeks must be maintained between injections.

Post-vaccination reactions and complications

Despite a high degree of purification, the administration of DTaP carries a risk of side effects. The most formidable post-vaccination complications are considered to be pathologies of the central nervous system. In particular, vaccinated patients may develop encephalopathy — a severe neurological disorder requiring immediate medical intervention and subsequent monitoring.

Immunization specifics in immunodeficiencies

The immunization tactics for children with HIV infection differ radically and are built on a delicate balance: physicians assess the risk of post-vaccination complications and weigh it against the severity of the course of natural infections.

The basic rule states: vaccinations are given according to the standard schedule, but preference is given exclusively to killed (inactivated) preparations. This applies to protection against tetanus, diphtheria, pertussis, hepatitis B, and Haemophilus influenzae infection. For example, only the inactivated polio vaccine is used to prevent poliomyelitis, whereas the live oral version is strictly contraindicated.

The administration of any live viral or bacterial vaccines (including BCG) to such patients is generally prohibited. The only exception is made for the measles, mumps, and rubella (MMR) complex. The use of conventional live vaccines here is justified by the fact that natural measles in an HIV-positive child very frequently ends in death, and severe adverse reactions to the vaccination itself have not been recorded in this group.

As additional protection starting from six months of age, an annual influenza vaccination is prescribed, and children older than two years are administered the polyvalent pneumococcal vaccine.

Emergency prophylaxis and legal aspects

If a child is at the manifest stage of HIV infection, their post-vaccination immunity often proves to be inadequate. Upon contact with infectious patients (in infection foci), standard vaccination will not work. In such cases, passive immunization is required — the administration of ready-made specific immunoglobulins.

All children with HIV are subject to lifelong dispensary registration with specialized professionals, regardless of the current stage of the disease. At the same time, the law strictly protects the patient's rights: the provision of any medical care with the observance of medical confidentiality is guaranteed. Disclosure of the diagnosis entails administrative liability for medical workers.

Occupational risks when working with patients

Since a specific vaccine against HIV itself does not exist, prevention comes down to interrupting transmission routes. For medical workers in contact with infected patients (including during vaccination procedures), a strict emergency response algorithm has been developed.

If infected blood gets onto the skin or mucous membranes, it is necessary to:

1. Rinse the area thoroughly with running water.
2. Treat the skin with 96% ethyl alcohol, maintaining an exposure time of 5 minutes.
3. Rinse the mucous membranes with a 2% boric acid solution.
4. Immediately initiate drug prophylaxis: take the antiretroviral drug (zidovudine) for one month.
5. Establish dispensary observation over the affected employee for a period of one year.

These measures are critically important, as the prognosis for the development of HIV infection is unfavorable, and the course of the disease is strictly staged and inevitable, progressing especially rapidly in pediatric practice.

Class and exam questions

What else to study on this topic

• Mechanisms of bacterial cell inactivation: thermal exposure and merthiolate.
• Passive immunization: indications for the use of specific immunoglobulins.
• Vertical transmission route of HIV: from screening of pregnant women to cessation of breastfeeding.
• Antiretroviral prophylaxis upon occupational contact with infected blood.
• Staging and rate of progression of HIV infection in pediatric practice.

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.