Allergy & Immunology
Expert discussions on allergic conditions, immunodeficiencies, drug hypersensitivity, and immunotherapy approaches.
Recent Discussions
In which patients with CHE will you prioritize early use of delgocitinib?
I can't think of any that I'd prioritize specifically compared to other patients. Trial of high-potency topical steroids, then Anzupgo next visit if not doing great. Other key point is to stop the steroid when you start the Anzupgo - topical steroids have a very strong negative impact on barrier fun...
How do you counsel patients with chronic urticaria on the role of stress management strategies in their treatment plan?
There are certain situations or times of the year when increased aeroallergen exposure is expected. It follows that increased vigilance is a management technique for those who suffer with sensitivity to these aeroallergen-induced symptoms in the areas of environmental control, pharmacotherapy, and, ...
What data exist regarding treatment for conjunctivitis from dupilumab in children <5 years of age?
The long-term dupilumab study in young children (Paller et al., PMID 41926052) showed 19% conjunctivitis (n = 121), all are mild to moderate and did not require treatment. Median time of resolution was 8 days. Therefore, if a young child with more severe conjunctivitis due to dupilumab lasting longe...
Does food sensitivity testing for IgG subclasses help guide your management of food allergy?
No, it absolutely does not. For clinical concerns about an IgE mediated event, the food specific IgE testing is what we reach for. For other adverse food reactions including intolerances or sensitivities, food IgG or subclass testing doesn't correlate with symptoms either. The presence of food speci...
Would you perform a bone marrow biopsy in a patient who had systemic anaphylaxis with hypotension to a stinging insect?
I would start with checking a serum tryptase and D816V mutation. Also, apply a REMA score and do a good skin exam. With normal tryptase and copy number, still check for KIT mutation.
Does receiving IVIG confound the result of SPEP and/or UPEP?
IVIG being a product of polyclonal immunoglobulins may ‘produce’ a monoclonal spike if the AUC is falsely calculated by the reader. IFE usually shows polyclonal banding but every now and then a monoclonal band is picked up. Being an IgG molecule with a 21 day halflife; and with the assumption that i...
Would you use the pneumococcal conjugate-21 vaccine (Capvaxive) instead of the conjugate-20 (Prevnar-20) for routine vaccinations in immunosuppressed patients?
PCV-21 was recently approved by the FDA and supported by ACIP. At this early stage (August 2024), CDC has not finalized guidance on PCV-21, so we do not know how the vaccine schedule will be changed. An important distinction is that PCV-21 covers different serotypes of pneumococcus, as outlined in t...
What are the best labs to trend improvement in HLH?
Unfortunately, there is not one specific laboratory test to definitively trend responses to HLH directed therapy. In general, our approach is to obtain baseline inflammatory labs including CBC with differential, ferritin, soluble IL2 receptor (sIL2r), triglycerides, coagulation studies (PT/PTT) incl...
What is your approach to a patient with undetectable MMR titers checked prior to or during immunosuppression and a history of MMR vaccination in childhood?
MMR titers are good correlates of protection. If any titer is undetectable it could be one of these situations: Primary failure. The components of the MMR have different efficacy. Two doses of appropriately given MMR will have 96+% against measles, but only 88% for mumps. Thus 1 in 10 appropriately...
Would you consider levofloxacin graded challenge, extended IV aztreonam, or an alternative treatment in a patient with reported anaphylaxis to penicillin, fluoroquinolones, and cefuroxime with cavitary pneumonia secondary to Klebsiella and Pseudomonas?
The first and most important thing would be to establish whether the patient had a true penicillin (as well as other antibiotic) allergy since >90% of patients who think they are sensitive to PNC really are not. If it is established that the patient does have a PCN allergy, consultation with ID is a...