IMMUNOLOGY TEXTBOOK - Mercury Podillia 2013

CORE PRINCIPLES IN THE MANAGEMENT OF IMMUNODEFICIENCY

Immune Characteristics in Helminth Infections

Helminth infections (such as ascariasis and trichinosis) stimulate IgE synthesis. At the site of pathogen entry, an infiltrate forms, consisting of eosinophils, basophils, and mast Cells. In some cases, parasitic worms evade recognition by displaying Antigens that cross-react with host Tissues.

The induction of specific immune responses during infections can trigger immunopathological conditions, including allergic and autoimmune reactions, as well as immune deficiencies.

For instance, a sudden release of large quantities of antigens due to microbial death in a sensitized Organism leads to The formation of immune complexes that cause autoimmune Glomerulonephritis. This complicates the course of streptococcal, pneumococcal, and Staphylococcal infections. Toxic immune complexes may also form during persistent viral infections. This is particularly evident in acute Viral Hepatitis A, where hepatocyte destruction manifests with typical clinical symptoms coinciding with the onset of the Immune Response. An excess of Antibodies relative to antigen leads to the formation of toxic immune complexes, whereas the formation of immune complexes in antibody excess during the destruction of infected cells results in pathogen elimination.

Most helminth infections are accompanied by allergic reactions, predominantly immune complex-mediated (Type III) or Cell-mediated (Type IV) hypersensitivity. Atopic reactions (Type I) also occur in ascariasis, urticaria, and Bronchial Asthma.

Autoimmune reactions frequently accompany infectious diseases. Classic Examples include joint and endocardial involvement in rheumatic fever, which is known to be caused by β-hemolytic streptococci. Several mechanisms contribute to their Pathogenesis: modification of self-antigens by pathogens or their toxins, the presence of cross-reacting antigens between the host and the microorganism, integration of viral Nucleic Acids into the host genome, and modification of target cell Proteins by the structural proteins of invading Viruses.

Immunological deficiency, particularly involving the T-cell compartment, virtually always accompanies bacterial, viral, fungal, and parasitic diseases. These conditions may be transient or lead to severe pathology, manifesting immediately or in a delayed manner long after the infection has cleared. They can present with a diverse clinical picture (frequent acute respiratory infections, Influenza) or remain asymptomatic, resulting in the chronic progression of infectious processes. Acute infections, particularly viral ones, can cause a catastrophic drop in immune reactivity, whereas chronic infections (such as malaria) lead to a more gradual functional exhaustion of The Immune System.

Treatment and Prevention of Helminth Infections

Pyrantel is administered as 1 tablet 3 times daily for one day, with the treatment repeated after two weeks.

Vermox is prescribed as 1 tablet 2 times daily for three days, repeating after two weeks.

Decaris is taken as 1 tablet at bedtime, with another single tablet at bedtime two weeks later. For young children, half a tablet per dose is sufficient.

For certain types of helminths (such as pinworms), therapeutic enemas (50–100 g) using freshly prepared garlic infusion are employed. To prepare this, 2–3 g (1–3 cloves, depending on size and freshness) of crushed garlic are infused in 50–100 g of hot milk for 15–20 minutes, strained, cooled, and administered as an enema at bedtime.

Strict adherence to Sanitary and hygienic standards is essential. This includes maintaining epidemiological precautions: keeping fingernails short and clean, and washing hands with soap before meals and after using the restroom. Thoroughly wash fruits and vegetables before consumption and implement measures for fly control. Perform regular wet cleaning of living spaces. Administer antihelminthic treatment to all household pets (cats, dogs). All family members should undergo medical screening and preventative antihelminthic treatment.