REVIEW ER 'S CONCLUSIONS There is no evidence to support feeding with a hydrolysed formula for the prevention of allergy in preference to exclusive breast feeding .
In high risk infants who are unable to be completely breast fed , there is evidence that prolonged feeding with a hydrolysed compared to a cow 's milk formula reduces infant and childhood allergy and infant CMA .
BACKGROUND Allergies and food reactions are common and may be associated with foods including adapted cow 's milk formulas .
Formulas containing hydrolysed proteins have been used to treat infants with allergy or food intolerance , and have been advocated for prevention of allergy and food intolerance in infants .
OBJECTIVES To determine whether use of hydrolysed formulas for infant feeding prevents allergy and food intolerance .
If hydrolysed formulas are effective , to determine what type of hydrolysed formula is most effective including extensively and partially hydrolysed formulas .
To determine which infants benefit including infants at low or high risk of allergy and infants receiving early , short term or prolonged formula feeding .
Manchester Asthma and Allergy Study: low-allergen environment can be achieved and maintained during pregnancy and in early life.
BACKGROUND Early exposure to dust mite allergens may be critical for primary sensitization . Reducing exposure may offer a realistic chance for primary prevention of sensitization and asthma , but it is essential to implement measures that can achieve and maintain the low-allergen environment . OBJECTIVE Our purpose was to assess the effectiveness of mite allergen avoidance measures in achieving and maintaining a low-allergen environment during pregnancy and in the first year of life . METHODS The Manchester Asthma and Allergy Study is a prospect i ve , prenatally r and omized study that follows the development of asthma and atopy in a cohort of infants at high risk ( both parents atopic ) who are r and omly allocated to full mite allergen avoidance or to a normal regimen . Avoidance measures comprise ( 1 ) mite-proof covers ( mattress , pillow , and quilt ) for parental bed , ( 2 ) high-filtration vacuum cleaner , ( 3 ) vinyl flooring in infant 's bedroom , ( 4 ) new crib and portable crib mattresses encased in mite-proof material , ( 5 ) benzyl benzoate ( Acarosan ) applied on carpets and soft furniture , ( 6 ) bed linens washed in hot water weekly , and ( 7 ) washable soft toys . Dust sample s from the parental bed , bedroom floor , living room floor , infant 's mattress , and nursery floor were collected between the 10th and 14th weeks of pregnancy , immediately after birth , and then at age 6 months and 1 year , and Der p 1 levels were determined by mAb-based ELISA . RESULTS Recovered Der p 1 from maternal mattress was reduced by 97 . 25 % ( 95 % confidence interval [ CI ] 95.25%-98.41 % ) during the second and third trimesters of pregnancy , with the effect persisting for 6 months ( 98 % reduction , 95 % CI 97.25%-99.1 % ) and 12 months ( 97.6 % reduction , 95 % CI 95.7%-98.6 % ) after the birth ( active vs control , P < .000001 ) . Total Der p 1 from bedroom floor in the active group was reduced by 53.7 % ( 95 % CI 25.7%-71.2 % ) in sample s collected within 4 weeks of the child 's birth , with the percentage reduction being 62 . 8 % ( 95 % CI 39.3%-77.2 % ) at 6 months and 26.5 % ( 95 % CI -24 % to 57.1 % ) at 1 year ( active compared vs control , P < .007 ) . Der p 1 levels in crib mattress and nursery floor in the active group were extremely low ( crib mattresses geometric mean [ 95 % CI ] 2.3 ng [ 1.6 - 3.4 ] at birth , 6.8 ng [ 4.5 - 10 ] at age 6 months , and 15.6 ng [ 9.8 - 24.8 ] at age 1 year [ active vs control , P = .001 ] ; nursery 1 ng [ 0.9 - 1.1 ] at birth , 1.7 ng [ 1.2 - 2.5 ] at age 6 months , and 2 ng [ 1.3 - 3.5 ] at age 1 year [ active vs control , P < .00001 ] ) . The total amount of allergen recovered at age 1 year was 29-fold ( 95 % CI 15.1- to 56.7-fold ) higher in the control group than in the active group . CONCLUSIONS The avoidance measures used in this study achieved and maintained a low mite allergen environment during pregnancy and in the first year of life in homes of infants at risk of atopy
REVIEW ER 'S CONCLUSIONS There is no evidence to support feeding with a hydrolysed formula for the prevention of allergy in preference to exclusive breast feeding .
In high risk infants who are unable to be completely breast fed , there is evidence that prolonged feeding with a hydrolysed compared to a cow 's milk formula reduces infant and childhood allergy and infant CMA .
BACKGROUND Allergies and food reactions are common and may be associated with foods including adapted cow 's milk formulas .
Formulas containing hydrolysed proteins have been used to treat infants with allergy or food intolerance , and have been advocated for prevention of allergy and food intolerance in infants .
OBJECTIVES To determine whether use of hydrolysed formulas for infant feeding prevents allergy and food intolerance .
If hydrolysed formulas are effective , to determine what type of hydrolysed formula is most effective including extensively and partially hydrolysed formulas .
To determine which infants benefit including infants at low or high risk of allergy and infants receiving early , short term or prolonged formula feeding .