Matsui's 2017 JAMA trial measured 2.0 µg/g of bedroom mouse allergen after professional control [1]. Matsui's 2017 education-only arm reached 2.5 µg/g with no significant symptom difference [1].
A 2025 New Jersey trial found kitchen mouse allergen fell up to 97.4% [2]. Symptoms are a different story. None of three trials with a symptom or care-use primary outcome found significant gains [1][3][4].
This page keeps two questions apart. Does the allergen fall, and do symptoms follow? Each trial is sorted by what it actually measured.
- Matsui's 2017 JAMA trial of 361 children found no significant symptom difference between professional pest control and education alone [1].
- Bedroom floor mouse allergen averaged 2.0 µg/g with professional control and 2.5 µg/g with education alone in Matsui's 2017 trial [1].
- Boston's 2004 pilot of 18 homes measured kitchen mouse allergen down 78.8% after pest control, while control homes rose 319% [5].
- Sarker's 2025 trial in 18 New Jersey buildings measured kitchen allergen drops of 97.4%, 85.8% and 34.9% in three cities [2].
- Sarker's 2025 trial found no significant bedroom allergen difference between treated and control buildings in any of 3 cities [2].
- Olson's 2021 New York City trial of 384 children found equal health-care use after one-time pest control and usual care [3].
- Phipatanakul's 2021 JAMA school trial of 236 students found 1.5 versus 1.9 symptom days per 2 weeks, not statistically significant [4].
- The 2020 NHLBI asthma guideline conditionally recommends pest management, citing low certainty of evidence [6].
- Cohn's 2004 national survey detected mouse allergen in 82% of 831 US homes [7].
Does Removing Mice Reduce Asthma Symptoms?
Three trials from 2017 to 2021 found no significant primary symptom or care-use gain [1][3][4]. Together they covered 981 children (361 plus 384 plus 236). Treated groups had fewer symptom days in each trial, but no primary gap reached significance.
Morgan's 2004 trial of 937 children did find a significant symptom gain [8]. Treated children averaged 3.39 symptom days per 2 weeks, controls 4.20. It targeted many triggers, and its reported allergen drops were cockroach and dust mite [8].
Why the strongest trial may have missed a benefit
Matsui's 2017 trial gave every household written pest guidance [1]. So no arm got zero advice. Allergen fell in both arms.
The authors noted the trial was not blinded [1]. Most homes never dropped below a level tied to higher illness risk [1]. The trial was sized to detect a 0.7-day gap in maximal symptom days [1].
In Matsui's 2017 trial, 64% and 68% of households by arm earned under $30,000 [1]. Results may not carry over to suburban homes.
How Much Does Mouse Allergen Drop After Pest Control?
Sarker's 2025 New Jersey trial cut kitchen mouse allergen by 34.9% to 97.4% [2]. Control kitchens ranged from a 61.4% drop to a 671.4% rise [2]. The authors flag small samples and large baseline variance as limits [2].
24 months
24 months
12 months
| Trial | Sample | Comparison and follow-up | Allergen result | Basis | Tier |
|---|---|---|---|---|---|
| Phipatanakul, Boston, 2004 [5] | 18 homes | IPM versus control homes, 5 months | Kitchen -78.8% versus +319% (P = .02) | Independent | 1 |
| Pongracic, Inner-City Asthma Study, 2008 [9] | 150 treated homes | Rodent-specific home intervention, up to 2 years | Bedroom floor -27.3% (95% CI -46.1% to -1.9%) | Independent | 1 |
| Kass, NYC public housing, 2009 [10] | 280 apartments | Single IPM visit versus scheduled spraying, 6 months | Mouse allergen ratio 0.7 (kitchen) and 0.8 (bedroom), not significant | Independent | 1 |
| Matsui, MAAIT, 2017 [1] | 361 children | IPM plus education versus education alone, 12 months | Bedroom floor 2.0 versus 2.5 µg/g, not significant | Independent | 1 |
| Sarker, New Jersey, 2025 [2] | 18 buildings | Trap and bait versus usual service, up to 24 months | Kitchen -97.4%, -85.8%, -34.9%. Bedroom not significant | Independent | 1 |
Bedroom results were weaker than kitchen results [2]. Kass's 2009 NYC trial found no significant mouse allergen drop in either room [10]. That study focused on cockroaches, and the authors cite few mice [10].
Boston's 2004 pilot of 18 homes cut kitchen allergen 78.8% [5]. Control homes rose 319%. Only 12 homes were treated.
Is Professional Pest Control Better Than Doing It Yourself?
Matsui's 2017 trial found professional control no better on symptoms or floor allergen [1]. The comparison group got written trap and sealing guidance plus a demonstration [1]. That is guided self-help, not doing nothing.
Airborne allergen and bed dust did favor professionals [1]. Airborne allergen was 2.19 versus 4.68 pg/m3 [1]. Bed dust was 0.58 versus 0.75 µg/g [1].
About 11% of the education-only group hired an exterminator by month 6 [1]. So the arms overlapped. The trial cannot say what no pest advice at all would show [1].
That trial measured asthma outcomes, not how long an infestation lasts. Our guide to DIY versus professional rodent control covers the pest side of that choice.
Does Sealing Entry Points Alone Reduce Allergen?
Sarker's 2025 trial found no infestation difference when exclusion was added to trapping [2]. No trial we found tested exclusion by itself. Both treated New Jersey arms used traps and rodenticide bait [2].
Sked's 2021 study saw infested apartments fall 87% at 3 months [11]. By month 12, one building was down 94% and the other was up 26% [11]. That rebound came after control returned to the building contractors.
Sealing gaps is a separate question from allergen. Our guide to exclusion versus extermination in Westchester homes covers what each method does.
How Long Until Mouse Allergen Levels Fall?
Sarker's 2025 trial measured New Brunswick kitchen allergen down 58.0% within 6 months [2]. Control kitchens there rose 396.1% over the same 6 months [2]. By month 24, the treated drop reached 97.4%.
| Trial | Sampling times | What happened | Basis |
|---|---|---|---|
| Phipatanakul, Boston, 2004 [5] | Months 1, 3 and 5 | Kitchen -78.8% and bedroom -77.3% by month 5 | Independent |
| Kass, NYC, 2009 [10] | Months 3 and 6 | Cockroach allergen fell. Mouse allergen change not significant | Independent |
| Sarker, New Jersey, 2025 [2] | Months 6, 12 and 24 | New Brunswick kitchen -58.0% at 6 months, -97.4% at 24 months | Independent |
| Matsui, MAAIT, 2017 [1] | Months 6, 9 and 12 | 50% drop at any visit in 83% (IPM) and 80% (education) | Independent |
| Sked, New Jersey, 2021 [11] | Months 3 and 12 | Infested apartments -87% at 3 months. Mixed at 12 months | Independent |
Sarker's 2025 samples came in different seasons, and authors tested for seasonal change [2]. Season is one more reason single readings can mislead.
How Common Is Mouse Allergen, and Does It Link to Asthma?
Cohn's 2004 national survey found detectable mouse allergen in 82% of 831 US homes [7]. Kitchen levels topped 1.6 µg/g in 22% of homes [7]. That level has been tied to higher sensitization rates.
| Study | Sample | Finding | Basis |
|---|---|---|---|
| Salo, 2009 [14] | 831 homes, 2,456 people | 35% of homes above 1.6 µg/g. Allergic residents: adjusted odds 1.93 (95% CI 1.14-3.27) of asthma symptoms | Self-reported |
| Ahluwalia, 2013 [15] | 144 Baltimore children | 41% mouse sensitized and exposed. Mouse allergen tracked worse outcomes than cockroach | Independent |
| Phipatanakul, 2000 [16] | 499 children | 18% skin-test positive. Sensitization 23% versus 11% above the 1.60 µg/g median (P = .007) | Independent |
| Chew, 2006 [13] | 324 NYC apartments | Mice found in 13%. Senior buildings with high allergen: 6.6-fold odds of an asthmatic resident | Independent |
| Wang, Gary, Indiana, 2008 [17] | 358 apartments, 1,173 residents | 81% of apartments had a pest infestation. Diagnosed asthma correlated with mouse infestation | Self-reported |
| NYC Housing and Vacancy Survey, 2021 [12] | 766,700 units (margin of error 25,530) | 24% of occupied units reported rodents in the building | Self-reported |
Salo's 2009 survey linked high allergen to asthma symptoms in allergic residents [14]. The adjusted odds ratio was 1.93. Surveys show a link, not a cure.
Ahluwalia's 2013 Baltimore study of 144 children tied mouse allergen to worse asthma [15]. Trials of removal are a separate test. Our guide to rodent infestation signs covers how to spot mice.
NYC's 2021 survey had 24% of occupied units reporting rodents in the building [12]. That figure covers rats and mice. A 2024 analysis in CDC's Preventing Chronic Disease flagged asthma emergency-visit hot spots near Yonkers, 2016 to 2019 [18].
What Do Asthma Guidelines and Reviews Say?
The 2020 NHLBI guideline conditionally recommends pest management, with low certainty of evidence [6]. It applies to people with asthma who are sensitized or symptomatic around pests [6].
| Source | What it says | Certainty | Tier |
|---|---|---|---|
| NHLBI expert panel, 2020 [6] | IPM alone or within a multicomponent plan is conditionally recommended for pest-related asthma | Low | 2 |
| Leas, 2018 review of 67 studies [19] | Pest control inside multi-part programs reduced exacerbations. Single-intervention pest studies were too few | Moderate for exacerbations | 2 |
| AHRQ report, 2018 [20] | Pest control inside multi-part programs did not cut emergency visits or hospitalizations. It reduced school absenteeism | Moderate to high (no effect). Low (absenteeism) | 2 |
| Hogaard, 2025 review of 54 trials [21] | 4 trials targeted pest allergen. No clear effect for pest interventions. Only 3 studies were high quality | Mostly low | 2 |
| CDC, Controlling Asthma [22] | Advises sealing cracks and removing food and water sources. Says to avoid sprays and foggers | Guidance | 2 |
| EPA, Asthma Triggers [23] | Lists pest droppings as triggers. Advises cleaning and sealing first. Warns pesticides can harm people | Guidance | 2 |
Leas's 2018 review covered 67 allergen-reduction studies [19]. Pest control inside multi-part programs reduced exacerbations, with moderate certainty [19]. Those programs did not cut emergency visits or hospitalizations [20].
A 2025 Danish review found only 4 of 54 trials targeted pest allergen [21]. Only 3 of the 54 studies were high quality. CDC advises avoiding sprays and foggers because they can trigger asthma attacks [22].
EPA advises cleaning, food storage and sealing first, and warns pesticides can harm people [23].
How Do the Trials Compare Side by Side?
Eight trials from 2004 to 2025 measured allergen or symptoms after pest control [5][9][8][10][1][3][4][2]. Table 5 lists them. The explorer below lets you filter by outcome.
| Trial | Setting and size | Compared | Allergen result | Symptom or care-use result | Basis of outcome |
|---|---|---|---|---|---|
| Phipatanakul 2004 | Boston homes, 18 | IPM versus control | Kitchen -78.8% versus +319% | Not reported in abstract | Independent |
| Morgan 2004 | 7 cities, 937 children | Multi-trigger program versus usual care | Cockroach and dust mite fell | 3.39 versus 4.20 symptom days (P < .001) | Self-reported |
| Pongracic 2008 | Inner-city homes, 150 treated | Rodent-specific intervention | Bedroom floor -27.3% | Less missed school and sleep loss. Not symptoms or medical use | Self-reported |
| Kass 2009 | NYC public housing, 280 apartments | One-visit IPM versus spraying | Mouse allergen not significant | Not measured | Independent |
| Matsui 2017 | Baltimore and Boston, 361 children | IPM plus education versus education | Floor 2.0 versus 2.5 µg/g, not significant | Median 2.0 versus 2.7 days (P = .16) | Self-reported |
| Olson 2021 | NYC homes, 384 children | One-time IPM versus usual care | Mouse infestation P = 0.11 | Care use equal. Reduced-activity days fewer (P = 0.04) | Self-reported |
| Phipatanakul 2021 | 41 schools, 236 students | School IPM versus none | 98% of classrooms had allergen at baseline | 1.5 versus 1.9 days, ratio 0.71 (95% CI 0.38-1.33) | Self-reported |
| Sarker 2025 | NJ public housing, 18 buildings | Trap and bait versus usual service | Kitchen -34.9% to -97.4%. Bedroom not significant | Not measured | Independent |
Trial explorer
Filter the 13 reported results by outcome level. Scores update as you choose.
What Isn't Measured Anywhere?
We found no published measurement of mouse allergen or asthma symptoms in Westchester homes. Our search ran through September 28, 2026 across PubMed, journals and agency pages. Missing from our search is not proof that nothing exists.
| Question | Why no data exists | Closest proxy |
|---|---|---|
| Mouse allergen levels in Westchester homes | We found no county or town home survey | 82% of US homes detectable [7]. 24% of NYC units report rodents [12] |
| Exclusion alone, effect on allergen or symptoms | Trials bundled sealing with traps and bait | Adding exclusion changed infestation little [2] |
| Effect on adults | Every symptom trial we found enrolled children or students | Survey link in all ages [14] |
| Suburban single-family homes | Trials ran in public housing, inner-city homes and schools | Detectable in homes of every type [7] |
| Pest control versus no advice at all | Every MAAIT household received education | 80% of education-only homes halved allergen [1] |
| Durability past 2 years | Longest follow-up was 24 months | One building rebounded 26% by month 12 [11] |
| Allergen level where symptoms improve | Only modeled, never tested in a controlled trial | Model: 14.1 fewer symptom days at a 90% drop [1] |
| Homeowner cost per asthma benefit | We found no home-level cost study | School IPM cost $7.27 per student [24] |
Rodent Control · Scarsdale & Westchester
Seeing signs of mice is a pest problem you can act on.
Pristine Pest connects Westchester homeowners with licensed rodent control providers. Lead gen service · read disclaimer.
See rodent control in ScarsdaleFrequently Asked Questions
Does getting rid of mice help asthma?
Pest control lowers mouse allergen, but trials have not shown a significant symptom benefit. Three trials from 2017 to 2021 found no significant primary symptom or care-use gain. Talk to your doctor or an allergist about asthma care.
How much does mouse allergen drop after pest control?
A 2025 New Jersey trial found kitchen allergen fell 34.9% to 97.4% in treated buildings. Bedroom levels did not drop significantly versus control. In the 2017 JAMA trial, bedroom floor allergen fell in both arms.
Is professional pest control better than doing it yourself for allergen?
In the 2017 JAMA trial, professionals did not beat education alone on symptoms. Airborne allergen and bed dust were lower with professionals, but floor allergen was not. About 80% of the education-only group cut bedroom allergen at least half at some visit.
Does sealing entry points alone reduce mouse allergen?
No trial we found tested sealing entry points by itself. In a 2025 New Jersey trial, adding exclusion to trapping showed no infestation difference. Ask a licensed provider what fits your home.
How long does it take for mouse allergen to fall?
In a 2025 New Jersey trial, one city's kitchen allergen fell 58.0% within 6 months. Later samples came at 12 and 24 months, and control kitchens often rose. Boston's 2004 pilot saw kitchen allergen down 78.8% by month 5.
Is mouse allergen common in Westchester homes?
We found no published Westchester home survey of mouse allergen. A 2004 national survey found detectable mouse allergen in 82% of US homes. New York City's 2021 survey had 24% of units reporting rodents in the building.
Methodology and Sources
We logged 50 sourced data rows from 25 sources dated 2000 to 2026. Each row carries a live URL and a tier. No URL meant no fact.
- Self-reported rows
- 12 of 50 (symptom diaries, caregiver reports, resident surveys)
- Independent rows
- 38 of 50 (lab dust assays, monitored counts, claims records, trial design facts)
- Vendor figures
- 0. No pest control company supplied a number
- Verification
- Full text through NCBI PMC where open, PubMed abstracts, agency pages
- Tier rule
- Tier 1 is a primary study or government survey. Tier 2 is a guideline, review or agency page. Tier 3 is secondary reporting. Tables use Tiers 1 and 2 only
We dropped three items. A Boston 2004 symptom result appeared only in a secondary summary. A NYC baseline mouse share and an NIEHS page went unconfirmed.
Derived numbers (Pristine Pest's own calculations)
- 0 of 3: count of randomized trials of mouse-focused pest control that reached P < .05 on a primary symptom or care-use outcome. Matsui 2017 (P = .16), Olson 2021 (no care-use difference) and Phipatanakul 2021 (ratio 0.71, 95% CI 0.38-1.33).
- 981: children and students in those three trials. Formula: 361 + 384 + 236.
- 2 of 2: trials built to test allergen reduction that found a significant kitchen drop versus control. Boston 2004 (P = .02) and New Jersey 2025 (P < .05).
How this page was made. We used AI tools to find and organize studies and to draft text. We checked figures against the cited papers, agency pages and abstracts. Where only an abstract was available, the dataset says so. This page has no named clinical reviewer. Report an error through our contact page.
Last updated: September 28, 2026. We re-check this page quarterly.