Type I of hypersensitivity reactions:
hay fever
vernal VKC
atopic AKC
giant papillary conjunctivitis (GPC)
Type II of hypersensitivity reactions:
✍ cytotoxic hypersensitivity (complement mediated)
✍ Example:
OCP( ocular cicatricial pemphegoid )
Mooren’s ulcer
Type III of hypersensitivity reactions:
Stevens-Johnson
disciform keratitis
subepithelial infiltrates
Wessely ring( after PRK or PTK)
scleritis
retinal vasculitis
phacoanyphlaxis
Type IV of hypersensitivity reactions:
✍ cell-mediated or delayed hypersensitivity (CD4 lymphocytes)
✍ Example:
phlyctenule
staphylococcus marginal keratitis
graft reaction
contact dermatitis
interstitial keratitis
granulomatous disease (TB, syphilis, leprosy)
sympathetic ophthalmia
Vogt-Koyanagi-Harada (VKH) syndrome
Type V of hypersensitivity reactions :
✍ stimulating antibody
✍ Example:
Graves’ disease,
myasthenia gravis
Types of hypersensitivity reactions videos:
Type I hypersensitivity (IgE-mediated hypersensitivity) – causes, symptoms, pathology video
Type II hypersensitivity (cytotoxic hypersensitivity) – causes, symptoms, & pathology video
Types of hypersensitivity reactions PowerPoint Presentation:
Hypersensitity, And Types of Hypersensitivity I, II, III, IV
Hypersensitivity Hypersensitivity (Immunological reaction) refers to undesirable immune reactions produced by the normal immune system. Hypersensitivity reactions: When an immune response result in exaggerated OR in appropriate reactions harmful to the host the term hypersensitivity OR allergy used. Hypersensitivity reactions: four types; based on the mechanisms involved and time taken for the reaction, a particular clinical condition (disease) may involve more than one type of reaction.