Chapter 18: Caring for the Child With an Immunological or Infectious Condition

The immune system functions through multiple components including leukocytes, lymphoid tissues, and organs that work collectively to defend against pathogens and foreign substances. Immunity operates through three distinct mechanisms: innate immunity provides general protection via physical barriers like skin, adaptive immunity develops through exposure to disease or vaccination, and passive immunity occurs when preformed antibodies are transferred from mother to child through the placenta or breast milk. Immunoglobulins serve critical roles in immune response, with IgM providing initial defense, IgG offering bacterial and viral protection, IgA protecting mucosal surfaces, and IgE mediating allergic responses. Primary immunodeficiency disorders, often genetic in origin, result in recurrent and severe infections that can be identified through clinical warning signs such as multiple ear infections annually or failure to thrive. Human immunodeficiency virus devastates the immune system by targeting CD4+ helper T cells, requiring diagnosis through DNA and RNA polymerase chain reaction testing in infants due to maternal antibody interference, while older children are tested using ELISA and Western blot methods. Nursing management emphasizes antiretroviral therapy, nutritional support, and prevention of opportunistic infections. Autoimmune conditions develop when the immune system incorrectly attacks the body's own tissues, presenting in conditions like systemic lupus erythematosus with characteristic facial rashing or dermatomyositis with proximal muscle weakness. Infectious disease transmission involves the interaction of host, environmental, and pathogenic agent factors. Common childhood infections include viral diseases such as varicella and Fifth disease, bacterial infections including pertussis and scarlet fever, fungal infections like oral thrush, and animal-borne diseases such as rabies. Prevention strategies center on vaccination schedules, strict infection control practices, and education regarding appropriate medication administration, with nurses avoiding aspirin use in viral illness due to Reye's syndrome risk. Care for isolated children requires collaboration with developmental specialists to mitigate psychological effects of restricted social interaction.