Evidence map›Paper›PMID 26424245›Full record

ArticleJournal of the American Association for Laboratory Animal Science : JAALAS2015

Nasal Histopathology and Intracage Ammonia Levels in Female Groups and Breeding Mice Housed in Static Isolation Cages.

Angela M Mexas, Angela K Brice, Adam C Caro, Troy S Hillanbrand, Diane J Gaertner

Open access · greenAbstract read
In one paragraph

Article in Journal of the American Association for Laboratory Animal Science : JAALAS, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
3.3field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 32 citations in OpenAlex.

  1. Analysis of IVC Microenvironments During an Extended Cage-Change Interval in Rats (Rattus norvegicus).Journal of the American Association for Laboratory Animal Science : JAALAS · 2026
    Article
  2. Article
  3. Maintaining Welfare While Extending Cage-Change Intervals: A Performance-Based Study in IVC-Housed Mice.Journal of the American Association for Laboratory Animal Science : JAALAS · 2026
    Article
  4. Review
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  6. Article
  7. Article
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  11. Article
  12. Evaluation and Refinement of a Spot-change-only Cage Management System for Mice.Journal of the American Association for Laboratory Animal Science : JAALAS · 2022
    Article
  13. Article
  14. Article
  15. Behavioral and Physiologic Effects of Dirty Bedding Exposure in Female ICR Mice.Journal of the American Association for Laboratory Animal Science : JAALAS · 2022
    Article
  16. Assessing Accumulation of Organic Material on Rodent Cage Accessories.Journal of the American Association for Laboratory Animal Science : JAALAS · 2021
    Article
  17. Article
  18. Compressed Paper as an Alternative to Corn Cob Bedding in Mouse (Journal of the American Association for Laboratory Animal Science : JAALAS · 2020
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Angela M MexasUniversity Laboratory Animal Resources, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Angela K BriceUniversity Laboratory Animal Resources, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Adam C CaroOffice of Animal Welfare, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Troy S HillanbrandUniversity Laboratory Animal Resources, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Diane J GaertnerUniversity Laboratory Animal Resources, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA. gaertner@upenn.edu.
University of Pennsylvania · US

Funding

Translational Research and Laboratory Animal Medicine Education for VeterinariansR25OD010986 · OD · UNIVERSITY OF PENNSYLVANIA · PI GAERTNER, DIANE J. · 2012 to 2015
$238k
NIH HHS 8R25OD010986NIH HHS R25 OD010986
6 · The paper itself

Abstract

Many factors influence ammonia levels in rodent cages, and high intracage ammonia has been associated with specific types of abnormal nasal pathology in mice. The use of autoclaved corncob bedding and the maintenance of low room humidity reduce the accumulation of ammonia in mouse cages. However, there are no engineering standards that define the limits of ammonia exposure for mice housed in static isolation cages. Regulatory guidance indicates that solid bottom cages must be sanitized at least weekly and that cage components in direct contact with animals must be sanitized at least every 2 wk. Common practice is to replace the bottoms and bedding of static isolation cages once weekly. To determine whether changing static isolation cages once weekly is an appropriate performance standard for mice, we prospectively evaluated the relationship between ammonia levels, nasal histopathology, and housing densities in various grouping strategies of mice housed in static isolation cages. Here, we report that the average nasal pathology score per cage and intracage ammonia levels were correlated, but nasal pathology scores did not differ among mice housed in breeding pairs, breeding trios, or female groups. In light of ammonia levels and histopathology scores as performance standards, these results suggest that a weekly cage-change frequency for static isolation cages does not result in adverse effects. Our results provide evidence to support current practices in the use of static isolation cages for housing laboratory mice in modern vivaria.

Indexed as

Animal HusbandryHousing, AnimalAmmoniaAnimalsAnimals, LaboratoryBreedingFemaleHumidityMaleMiceMice, Inbred BALB CMice, Inbred C57BLNasal MucosaSterilizationAmmonia

Identifiers

PMID26424245
PMCPMC4587615
OpenAlexW2412261938

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.