the difference between food allergy and intolerence.
intolerence in children often is caused by milk, in infants the milk protein irritates the valve at the top of the stomach, causing it to realise the milk and digestive juices, causing reflux and acid pain. this also means the ratio of food to digestive juices is not correct and food is not digested properly. causing undigested food to travel the rest of the way through the system, irritating the' inner tubing' so to speak, and increasing the amount of differing foods that irriate.
sometimes a infant will digest normally, but scream passing normal looking stools but will be in great pain, this is caused by protein irrirating lining of anu
avoidance of food, in diet,/ allergy formula for 6 weeks before improvement is seen.
ige alllergy, is caused by food protein entering blood stream, the body mistakingly releases histamine to fight infection, but as no virus or bacteria there, the large amount of histamine causs two main actions on the body.
causing small blood vessels to dilate, diverting blood from major organs, this will show as lowing blood pressure. the other problem is that histamine causes smooth muscles to contract and narrow, the ones in throat and chest, often causing asthma. of course , ige allergy can be life threatening, and strict avoidance of allergen is required.
epi pens which carry an injection of adrenaline halt reaction progession, and give time to recieve medical attention at hosptial.
hope this explains things a little, please take some time looking at the allergy uk and anaphylaxis campaign web site for more information.
p.s egg allergy is often outgrown and baked egg /cooked in high temp to change protein structure is often first step. ideally this should be under medical conditions, such as in a allergy clinic hosptial ward, under advice from immunologist.
there is no proof that vaccines cause egg allergies, however if egg allergy is there, it may be a problem . not all vaccines are cultured in egg. am aware the mmr is cultured in egg, and flu vaccine. those with egg allergy can have egg free vaccines or take vaccine in hosptial conditions in case of reactions.
but this is very rare.