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  • Cow's Milk Protein...

Cow's Milk Protein Allergy in Children: IAP Guidelines

Written By : Ayesha Sadaf |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2022-12-10T09:45:05+05:30  |  Updated On 10 Dec 2022 1:14 PM IST
Cows Milk Protein Allergy in Children: IAP Guidelines
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Food allergy is an emerging health issue in our country. It is an adverse effect arising from a specific immune response occurring on exposure to a particular food. Food allergy must be differentiated from food intolerance, which is general nonspecific term for any adverse reaction to particular constituent of food. Cow's milk protein allergy (CMPA) is the most common food allergy in infancy, with reported prevalence of 1.5–3% in infancy and fall to <1% by 6 years of age. Cow's milk protein allergy is more likelihood of affecting children with other atopic conditions such as asthma, allergic rhinitis, and eczema among others, or with a family background of allergies. About 10–15% of children who have CMPA are also allergic to soy.

The Indian Academy of Pediatrics (IAP) has released Standard Treatment Guidelines 2022 for Cow's Milk Protein Allergy in Children. The lead author for these guidelines Cow's Milk Protein Allergy in Children is Dr. RK Gupta along with co-author Dr. Soumya Nagarajan and Dr. Dhanesh Volvekar. The guidelines come Under the Auspices of the IAP Action Plan 2022, and the members of the IAP Standard Treatment Guidelines Committee include Chairperson Remesh Kumar R, IAP Coordinator Vineet Saxena, National Coordinators SS Kamath, Vinod H Ratageri, Member Secretaries Krishna Mohan R, Vishnu Mohan PT and Members Santanu Deb, Surender Singh Bisht, Prashant Kariya, Narmada Ashok, Pawan Kalyan.

Following are the major recommendations of guidelines:
Cow's milk protein allergy can manifest in a varied clinical presentation and can be attributed incorrectly to many symptoms.
As immediate symptoms of immunoglobulin E (IgE)-mediated CMPA can be readily recognized, timely recognition of non-IgE-mediated CMPA can be a diagnostic dilemma, due to delayed onset of presentation and overlapping with functional gastrointestinal (GI) disorders.
IgE-mediated immediate food allergy reactions occur within minutes to 2 hours while in non-IgE-mediated or mixed type CMPA, symptoms occur after 2 hours up to 2 days or even 1 week

TABLE 1: Symptoms and signs of CMPA.

IgE-mediated symptoms

Non-IgE-mediated symptoms

Skin

Urticaria, angioedema, and rashes

Acute flaring of atopic dermatitis

Respiratory

Wheezing, cough, running nose, conjunctivitis, and laryngeal edema

Heiner syndrome (a rare form of pulmonary hemosiderosis)

Gastrointestinal

Vomiting, GERD, dysphagia, pain abdomen, diarrhea, blood in stool, and oral allergy syndrome

Fresh bleeding per rectum, watery diarrhea, failure to thrive, protein losing enteropathy, occult gastrointestinal bleeding, reflux like symptoms, vomiting/feed refusal or aversion, dysphagia, hematemesis, chronic diarrhea, constipation, and colic

Cardiovascular

Hypotension and tachycardia

Iron deficiency anemia

Systemic

Anaphylaxis

Failure to thrive

(CMPA: cow's milk protein allergy; GERD: gastroesophageal reflux disease; IgE: immunoglobulin E)
Eosinophilic esophagitis, food protein enteropathy (FPE), food protein-induced enterocolitis syndrome (FPIES), and food protein-induced proctocolitis (FPIP) are distinct clinical entities associated with non-IgE-mediated CMPA.
Well Baby with Blood in Stools:
Some exclusively breastfed, happy thriving infants may develop allergy to CMP due to protein transfer via breast milk with symptoms of blood and mucus streaking in otherwise normal stools. This settles within 48–72 hours of cow's milk protein elimination from mother's diet and generally resolves by 1 year of age.
Differential Diagnosis:
With an extensive list of symptoms associated with CMPA, differential diagnosis includes other food allergies, lactose intolerance, immunodeficiency, infectious enterocolitis, irritable bowel syndrome, Meckel's diverticulum, cystic fibrosis, pancreatic insufficiency, etc. Lactose intolerance is commonly confused with CMPA, presents with loose stool and flatulence but without vomiting, blood in stool or any other system involvement (Table 2). Most common variety is secondary lactose intolerance due to loss of brush border lactase expression secondary to inflammation or structural damage, usually gastroenteritis. Usually resolves by 2 weeks exclusion of lactase in diet. Primary and congenital variety is rare and permanent.

TABLE 2: Differences between CMPA and lactose intolerance.

CMPA

Lactose intolerance

Types

IgE and non-IgE-mediated

Due to deficiency of lactase enzyme in intestinal brush border

Mechanism

It is an immune-mediated reaction to milk protein, so even small exposure may cause features

Quantity-dependent so small amount may be tolerated

Symptoms

Multisystem involvement (GIT, respiratory, skin, and CVS)

Only gastrointestinal (diarrhea, flatulence, and pain)

Natural history

Recovers by 4–5 years of age in majority of people

Recovers in days/weeks in secondary, permanent in congenital and primary types

(CMPA: cow's milk protein allergy; CVS: cardiovascular system; GIT: gastrointestinal tract; IgE: immunoglobulin E)
Diagnosis:
Cow's milk protein allergy is a clinical diagnosis, and there is no single test or biomarker that is pathognomonic of the condition. Clinical clues that suggest IgE-mediated disease are the involvement of two or more systems, commonly the skin, GI, and respiratory tract. On the contrary, non-IgE-mediated disease (which is more common in India) may manifest with only GI symptoms. In cases where IgE-mediated variety is suspected, skin prick testing (SPT) and/or blood test for specific IgE can be considered. When non-IgE-mediated case is suspected, elimination of milk protein from diet and oral challenge after improvements in clinical symptoms confirms the diagnosis (Flowchart 1).
Oral Challenge Test:
Cow milk either as formula or pasteurized milk (in <12 months age) is administered cautiously in the following manner: 1 mL, 3 mL, 10 mL, 30 mL, and 100 mL (given every 30 minutes), which can be done on an outpatient basis. The child should be observed for 2 hours, and then sent home with an instruction to continue at least 200 mL of milk/day and to stop if there is recurrence of symptoms. The child should be reviewed after 2 weeks.
For those with severe reactions on initial presentation (IgE-type), the milk challenge is administered in hospital setup in more graded fashion (0.1 mL, 0.3 mL, 1 mL, 3 mL, 10 mL, 30 mL, and 100 mL: given every 30 minutes) as an inpatient with all resuscitation facilities including injection adrenaline to manage anaphylaxis. A positive reaction to milk introduction confirms the diagnosis of CMPA. If no reactions occur, 200 mL/day of milk is continued for 2 weeks to look for any delayed manifestations.
Double-blind Placebo-controlled Food Challenge:
Although being reference standard for diagnosis is limited to research as they are time consuming and expensive. Endoscopy/histopathology will be of help in unexplained cases only.
What is not Required for Diagnosis?
No role for total eosinophil count, vacuolated eosinophil count, and total IgE levels. As of now, atopic patch test is not recommended by any standard guidelines. Basophil histamine release assay and lymphocyte stimulation are used in research setup. Component resolved diagnosis (CRD) or molecular level antigen testing should not be used in routine.

Source:Indian Academy of Pediatric Guidelines

Treatment:

Source:Indian Academy of Pediatric Guidelines

Strict avoidance of CMP for a defined period and reintroduction at right time is the key to management. Early and accurate diagnosis is important, as delayed diagnosis may result in failure to thrive and anemia while overdiagnosis results in unnecessary dietary restrictions and economic burden.

Treatment of CMPA includes removing cow's milk protein from your child's diet (elimination diet). Elimination diets are usually started with extensively hydrolyzed formula (eHF), with improvement in about 90% of children with CMPA. Amino acid formula (AAF) is used in severe CMPA or when child is not responding to eHF even after 14 days. Elimination diet should be continued for at least 1 year and reevaluation done every 6 months.
Buffalo's, goat's, or sheep's milks generally elicit the same reaction as cow's milk, so using these as a substitute is not likely to improve symptoms.
Soy protein-based formulae are tolerated by the majority of infants with CMPA, but about 10% of affected infants react to soy protein, with higher proportions in infants younger than 6 months so not to be used in <6 months age.
In the case of immediate reaction CMPA that causes anaphylaxis, intramuscular (IM) epinephrine (1:1,000) should be used immediately. Patients with anaphylaxis need to be evaluated and monitored in an emergency room, even if the symptoms improve with epinephrine. This is because there is a risk of a "second wave" of symptoms occurring after the epinephrine wears off.
The best way to prevent CMPA is exclusive breastfeeding for 4–6 months (17–27 weeks). The incidence of CMPA is lower (0.5%) in exclusively breastfed infants compared to formula-fed or mixed-fed infants.
Prognosis:
About 50% will develop tolerance by 1 year, 75% by 3 years, and 90% by 6 years. Other food allergy can come up in 50% and to inhalants by 50–80% before puberty.
Reference:
  • Caffarelli C, Baldi F, Bendandi B, Calzone L, Marani M, Pasquinelli P. Cow's milk protein allergy in Further Reading children: a practical guide. Ital J Pediatr. 2010;36:5.
  • Koletzko S, Niggemann B, Arato A, Dias JA, Heuschkel R, Husby S, et al. Diagnostic approach and management of cow's-milk protein allergy in infants and children: ESPGHAN GI Committee practical guidelines. J Pediatr Gastroenterol Nutr. 2012;55(2):221-9.
  • Luyt D, Ball H, Makwana N, Green MR, Bravin K, Nasser SM, et al. BSACI guideline for the diagnosis and management of cow's milk allergy. Clin Exp Allergy. 2014;44(5):642-72.
  • Matthai J, Sathiasekharan M, Poddar U, Sibal A, Srivastava A, Waikar Y, et al. Guidelines on diagnosis and management of cow's milk protein allergy. Indian Pediatr. 2020;57:723-9.
  • Vandenplas Y. Prevention and management of cow's milk allergy in non-exclusively breastfed infants. Nutrients. 2017;9(7):731.

The guidelines can be accessed on the official site of IAP: https://iapindia.org/standard-treatment-guidelines/

Indian Academy of PediatricIAP GuidelinesFood allergyimmuneatopicimmunoglobulin ECMPAenterocolitis
Source : Indian Academy of Pediatric,IAP Guidelines
Ayesha Sadaf
Ayesha Sadaf

    I have done my Bachelor of pharmacy from United Institute of Pharmacy and currently pursuing pharmaceutical MBA from Jamia hamdard. I worked as an intern at the position of content creator in Medical Dialogue and am highly obliged to the company for giving me this wonderful opportunity.

    Dr. Kamal Kant Kohli
    Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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