Allergen Data Collection: Goat's Milk (Capra spp.)
Internet Symposium on Food Allergens 4(2):119-24 (2002) [http://www.food-allergens.de]
1 Prevalence of Goat's Milk Allergy

1.1 Subjects with Atopic or Other Diseases
 
 
Country / Subjects Sensitivity / Allergy to References
Denmark, Copenhagen
Germany, Bochum
21 selected milk-allergic patients
goat's milk (CRIE) Gjesing et al. 1986
France, Gif Sur Yvette / Paris
58 patients with CMA and specific IgE to bovine CAS (0.3 to >100 IU/mL)
sheep's milk: ovine CAS 98% (RAST)
goat's milk: caprine CAS 93% (RAST)
rat's milk CAS 59% (RAST)
rabbit's milk CAS 57% (RAST)
Bernard et al. 1999
France, Nancy and Toulouse
544 food allergic children
goat's milk 0.55%  (food challenge)
cow's milk 13% (food challenge)
Rance et al. 1999b
Italy, Florence
54 episodes of food-dependent anaphylaxis in 44 children (age of 1 month to 16 years) (from 1994-1996)
goat's milk 4%
cow's milk 22%
Novembre et al. 1998
Italy, Palermo
21 hydrolysed protein formula intolerant infants with CMA (median age at diagnosis 2 months) treated with an ass' milk-based diet
goat's milk in 5/6 (DBPCFC)
sheep's milk in 4/7 (DBPCFC)
Carroccio et al. 2000
Italy, Rome
26 children with CMA (DBPCFC)
goat's milk in 92% (DBPCFC) Bellioni-Businco et al. 1999

 
2 Symptoms of Goat's Milk Allergy
 
Symptoms & Case Reports References
systemic reactions
anaphylaxis (2), anaphylactoid reaction (5)

cutaneous symptoms
angioedema (1, 3), swelling of eyelids (1, 4), watery eyes (4), rhinoconjunctivitis (1), rush (3), urticaria (1, 3), contact urticaria (4), generalized urticaria (1) 

gastrointestinal symptoms
oral pruritus (5), vomiting (3)

respiratory symptoms
asthma (1), cough (4), dyspnea (1, 4), allergic rhinitis (3), wheeze (3, 4)

(1) Wüthrich & Johansson 1995
(2) Novembre et al. 1998
(3) Bellioni-Businco et al. 1999
(4) Umpierrez et al. 1999
(5) Orlando et al. 2000
Percentage of Reactions
Urticaria in 50%, respiratory symptoms (rhinitis and/or wheezing) in 21%, angioedema in 13%, and vomiting and rush in 17% of patients (24 goat's milk allergic children, DBPCFC) (1)
(1) Bellioni-Businco et al. 1999
Threshold for Elicitation of Symptoms
Doses between 3 and 100 mL (mean 38 mL) of goat's milk allergic symptoms in 24 goat's milk allergic patients  (DBPCFC) (1)
(1) Bellioni-Businco et al. 1999

3 Diagnostic Features of Goat's Milk Allergy
 
Parameters / Subjects Outcome References
SPT, RAST, Clinical Reactivity without Sensitization to Cow's Milk
2 patients with allergy to goat's and sheep's cheese
Positive SPT to:
goat's milk in both patients
Positive skin scratch test to:
goat's and sheep's cheese in both patients
Negative SPT cow's milk in both patients
Positive RAST to:
goat's and sheep's cheese and caseins in both patients, 
Negative RAST to:
cow's milk, alpha-lactalbumin, beta-lactoglobulin, and casein
Clinical reactivity to goat's cheese and sheep's cheese with tolerance of cow's milk and cheese
Wüthrich & Johansson 1995
SPT, RAST, Clinical Reactivity without Sensitization to Cow's Milk
2-year old girl with allergy to goat's and sheep's cheese
Positive SPT to:
goat casein, sheep's milk, and sheep casein
Positive prick-to-prick test to:
goat's milk and cheese, sheep's milk and cheese
Negative SPT and prick-to-prick test to cow's milk
Positive RAST to:
goat's milk and casein, and sheep's milk and casein
Negative RAST to:
cow's milk and casein
Clinical reactivity to goat's cheese and sheep's cheese with tolerance of cow's milk and cheese
Umpierrez et al. 1999

4 Composition of Goat's Milk
 

5 Allergens of Goat's Milk
 
Proteins / Glycoproteins aa Sequence Allergen Nomenclature References
alpha-Lactalbumin [15 kDa] Swiss-Prot: P00712   Bellioni-Businco et al. 1999, Docena et al. 2002
beta-Lactoglobulin [18 kDa] Swiss-Prot: P02756   Bellioni-Businco et al. 1999, Docena et al. 2002
Serum Albumin [69 kDa]     Bellioni-Businco et al. 1999, Docena et al. 2002
Caseins [33-40 kDa] Swiss-Prot: 
P18626 (alpha-S1)
P33049 (alpha-S2)
P33048 (beta)
P02670 (kappa)
  Bellioni-Businco et al. 1999, Umpierrez et al. 1999, Docena et al. 2002
Allergens: 22 and 28 kDa     Bellioni-Businco et al. 1999

6 Cross-Reactivities
 
Cross-Reacting Allergens Subjects / Methods References
Goat's Milk
cow's and sheep's milk, and modified cow's milk formulas
16 children with CMA: high inhibition of IgE- binding to cow's milk by goat's and sheep's milk, modified cows' milk formula and CAS formula (RAST inhibition) Dean et al. 1993
Goat's Milk
cow's milk
9 milk allergic patients: IgE- binding to cow's and goat's milk proteins corresponding in Mr to beta-LG and CAS (immunoblot) Sabbah et al. 1996
Goat's Milk
cow's milk
26 children with CMA (DBPCFC positive) and positive SPT and RAST to goat's milk; 92% reacted to goat's milk in DBPCFC; cow's milk completely extinguished IgE- binding to goat's milk allergens, goat's milk partially inhibited IgE- binding to cow's milk allergens (RAST- and SDS-PAGE inhibition) Bellioni-Businco et al. 1999
Goat's Milk
cow's, ewe's, and buffalo milk
6 children with CMA:
IgE- binding to milk allergens from cow, ewe, goat, and buffalo, but not from camel  (SDS-PAGE immunoblot, inhibition)
Restani et al. 1999
Goat's Caseins
goat's, sheep's, and cow's milk
Inhibition of IgE- binding to goat's and sheep's CAS by cow's milk CAS in 1 adult (RAST inhibition) Wüthrich & Johansson 1995
Goat's Caseins
whole casein fractions from cow, goat, ewe, rabbit and rat milk *
Sera from 58 patients with CMA and specific IgE to bovine CAS:
specific IgE titers:
bovine > ovine > caprine CAS;
79% and 66% of sera showed IgE-binding to rabbit-CAS and rat-CAS of <10% intensity as compared to bovine CAS (ELISA)
Bernard et al. 1999
Goat's Caseins
goat's and sheep's milk
1 cow's milk tolerant child with goat's and sheep's milk allergy: high degree of cross-reactivity between goat's and sheep's milk CAS (RAST inhibition); IgE binding to allergens in goat's milk at 22, 27, and 31 kDa and sheep's milk at 31 kDa (SDS-PAGE immunoblot) Umpierrez et al. 1999
Goat's alpha Caseins
goat's, sheep's, and cow's milk
17 children with CMA (immediate type): Inhibition of IgE binding to bovine alpha-CAS by alpha-CAS from cow, goat, and sheep (RAST inhibition), lower specific IgE levels to goat- and sheep alpha-CAS (RAST) Spuergin et al. 1997
*  multiple sensitization (not proved by inhibition-tests)
 
 
Unique Allergens Subjects / Methods References
Goat's Caseins
goat's and sheep's vs cow's milk CAS
No inhibition of IgE- binding to goat's and sheep's CAS by cow's milk CAS in 1 adult (RAST inhibition) Wüthrich & Johansson 1995
Goat's Caseins
goat's and sheep's vs cow's milk CAS
1 cow's milk tolerant child with goat's and sheep's milk allergy: Decreased inhibition of IgE- binding to goat's milk and CAS by cow's milk and CAS, but not by goat's and sheep's milk and CAS (RAST inhibition); IgE binding to allergens in goat's milk at 22, 27, and 31 kDa, in sheep's milk at 31 kDa and cow's milk at 34 kDa (SDS-PAGE immunoblot) Umpierrez et al. 1999

 

7 Allergen Sources
 
Reported Adverse Reactions References
Goat's and Sheep's Cheese
Several allergic reactions after ingestion of feta (cheese made from sheep's milk) in a 15-year-old boy, after ingestion of sheep's or goat's cheese in a 25-year old patient, both tolerated ingestion of diary procucts from cow's milk  (1)
Allergic reactions after eating goat's cheese and after touching of goat's and sheep's cheese in a 2-year-old girl with tolerance to dairy products from cow's milk (2)
A young adult male had severe a anaphylactoid reaction after eating goat's cheese; goat's and  sheep's milk elicited mainly oral pruritus while cow's milk and cheese was well tolerated (3)
(1) Wüthrich & Johansson 1995
(2) Umpierrez et al. 1999
(3) Orlando et al. 2000

8 Food Allergen Labelling
 
Food Allergen  Labelling / Regulation Status References
International Regulations
Goat's milk and products of these
labelling not recommended (1) (1) Codex Alimentarius Commission 1999
European Regulations
Goat's milk and products of these
labelling not recommended (1) (1) Bousquet et al. 1998

 

9 References


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