Allergies to latex rubber have been identified as a serious concern for workers who become sensitized to latex gloves and other natural rubber-containing products such as medical supplies. Although the symptoms vary from case to case, the most common reaction to latex products is the development of dry, itchy, and irritated areas on the skin (irritant contact dermatitis), usually the hands.
Other reactions may include rashes and skin blisters which can spread away from the area of skin touched by the latex (allergic contact dermatitis). This reaction is similar to a typical poison ivy reaction.
A person may also be exposed by breathing in (inhaling) airborne latex particles (e.g., particles that are released when the gloves are removed).
More severe reactions may involve immediate hypersensitivity with respiratory symptoms such as runny nose, sneezing, itchy eyes, scratchy throat and asthmatic symptoms including coughing, wheezing, shortness of breath, chest tightness and more severe reactions such as swelling of the face, lips and airways.
Severe anaphylactic shock reactions may happen. However a life threatening reaction is rarely the first sign of a latex allergy. If a severe reaction occurs, get medical help immediately.
Latex is a tacky, milky sap that is produced by some types of shrubs, plants and trees including the commercial rubber tree (Havea Braziliensis). The latex sap is made up of tiny droplets that contain water and hydrocarbon polymer and have a coating comprised of proteins. The sap is used to make latex rubber, also known as natural rubber.
Various chemicals must be added to latex to give the natural rubber product the desired strength, stretch and durability properties. Starch may be used to keep rubber products from sticking to each other. It also makes it easier to put on latex gloves.
Research has identified a protein substance in natural latex as a major source of the allergy. The protein can be absorbed through the skin or the powder containing the protein can be inhaled. However, chemicals such as zinc diethyldithiocarbamate (which is added to the latex) and starch powder (found in new gloves) have also caused allergic reactions in sensitive people. Actually, it is the protein in the glove material that has been absorbed by the cornstarch that causes the allergic reaction. Powder-free gloves cause fewer allergic problems.
Latex allergy is an occupational health hazard for many people including:
While it is rarer, some people are sensitive to latex in other products, such as:
This list is not inclusive.
In the US, OSHA estimates that 8 to 12% of health care workers are latex sensitive. There is evidence that some people who are allergic to certain foods and fruit (banana, avocado, kiwi, passion fruit, chestnuts) as well as some pollen and grasses may also develop an allergic reaction to latex.
Latex allergy can be prevented by protecting workers from latex exposure. Employers should:
"Hypoallergenic" gloves are usually made from latex so latex-sensitive workers should check to see if they are made from latex or some other material.
Persons allergic to latex rubber products should consult an allergist to find out if they are actually allergic to latex (natural) rubber or to chemicals that are in synthetic rubbers. They should also advise their physicians and dentists so that they can decide if alternate products should be used in any treatment that normally requires the use of rubber products.
Symptoms typically will quickly subside with avoidance. However, one study found that blood tests of sensitized health care workers who had avoided contact with latex for more than 5 years still showed latex sensitivity.
Document last updated on May 1, 2013