Mosquito bites can often result in a swollen skin area aroun

Mosquito bites can often result in a swollen skin area around the bite which is red and sore. This reaction is caused by a saliva protein secreted by the mosquito to avoid clotting of the blood. Which type of hypersensitivity do mosquitoe bites usually cause? O type O type O type Ill O type IV

Solution

1. Mosquito bites often leads to \'Type 1\' immediate hypersensitivity that causes swelling and redness

2.Mast cells often secrete histamines from type 1 severe hypersensitivity, hence \'Antihistamines\' will be the treatment

3.Type 1 hypersensitivity involved \'Th1\' cell mediated response which activates macrophages and triggers inflammatory responses

4.\'True\', It is an immediate type of reaction and prior sensitization is not required.

5.Type 3 hypersensitivity the immune complex are buried in spleen and \'lymph nodes\'

6.\'NK\' or natural killer cells are invloved in Type 4 hypersensitivity ensuring they do not get out of control

7.If the hint is Antigen-Antibody immune complexes it is always \'type 3\' hypersensitivity

8.\'Macrophages\' which acts as Antigen presenting cells in Type 2 hypersensitivity.

9.Type 1 hypersensitivity always produces \'IgE\' antibodies

10.\'Macrophages\' engulfes the immune complexes and degrade them in type 3 hypersensitivity

11.\'IgG and IgM\' are involved in type 2 hypersensitivity by binding with the antigen and degrade via Membrane attack complex (MAC)

12.\'Erythroblastosis fetalis\' is one of the major pathological condition from type 2 hypersensitivity reactions

13.\'Multiple sclerosis\' is an example of type 4 hypersensitivity

14.\'False\' it is an immediate response which doesn\'t require pre-recognition

15.Type 4 hypersensitivity involves Th1, Tc and M0 Since it is a delayed immune hypersensitivity reaction.