Rodent

Environmental enrichment and mouse models: Current perspectives

The provision of environmental enrichment to numerous species of laboratory animals is generally considered routine husbandry. However, mouse enrichment has proven to be very complex due to the often contradictory outcomes (animal health and welfare, variability in scientific data, etc.)...

Year Published: 2018Topics: Disease/Experimental Model, Environmental EnrichmentAnimal Type: Mouse, Rodent

Citation: Bayne, K. 2018. Environmental enrichment and mouse models: Current perspectives. Animal Models and Experimental Medicine 1(2), 82-90.

A break from the pups: The effects of loft access on the welfare of lactating laboratory rats

Rats (Rattus norvegicus) bred for research are typically confined with their litters until weaning, but will spend time away from pups when given the opportunity. We aimed to assess how dam welfare is affected by the ability to escape from...

Year Published: 2021Topics: Rearing & WeaningAnimal Type: Rat, Rodent

Citation: Ratuski, A. S., Weary, D. M. 2021. A break from the pups: The effects of loft access on the welfare of lactating laboratory rats. PLOS ONE 16(6), e0253020.

Assessing the severity of laparotomy and partial hepatectomy in male rats—A multimodal approach

This study assessed the postoperative severity after three different visceral surgical interventions in rats by using objective parameters pertaining to various disciplines. The objective was to evaluate whether the degree of severity increases with the invasiveness of the intervention and...

Year Published: 2021Topics: Welfare AssessmentAnimal Type: Rat, Rodent

Citation: Zieglowski, L., Kümmecke, A. M., Ernst, L. et al. 2021. Assessing the severity of laparotomy and partial hepatectomy in male rats—A multimodal approach. PLOS ONE 16(8), e0255175.

The effects of bedding material on the treatment of mild pododermatitis in the guinea pig (Cavia porcellus)

One of our colony's five guinea pigs started to develop a moderate case of pododermatitis (bumblefoot) on one paw, which staff were keen to alleviate to prevent any detrimental effects that this might have on her health and welfare. Pododermatitis...

Year Published: 2021Topics: Husbandry & ManagementAnimal Type: Guinea Pig, Rodent

Citation: Ferguson, K., Fisher, Z. 2021. The effects of bedding material on the treatment of mild pododermatitis in the guinea pig (Cavia porcellus). RATEL (Journal of the Association of British and Irish Wild Animal Keepers) 48(1), 18-22.

DIY: Dehydrated watermelon training chips

This simple DIY training treat is great for NHP, swine, rabbits, rodents, and dogs. Note that dehydrated watermelon may resemble muscle tissue!

Year Published: 2021Topics: Environmental EnrichmentAnimal Type: Baboon, Capuchin, Chimpanzee, Chinchilla, Dog, Gerbil, Guinea Pig, Hamster, Lemur, Macaque, Marmoset, Mouse, Nonhuman Primate, Other Nonhuman Primate, Other Rodent, Owl Monkey, Pig, Rabbit, Rat, Rodent, Squirrel Monkey, Vervet (African Green Monkey)

Citation: Lambert, K. 2021. DIY: Dehydrated watermelon training chips. Laboratory Animal Science Professional 9(4) (July/August), 48.

Effect of chronic handling and social isolation on emotion and cognition in adolescent rats

Adolescence is a critical period of establishing social relations through social interactions that affect the emotional development associated with stress responses, anxiety, depression, and cognitive development. We investigated the behavioral and neurobiological changes induced by handling and social isolation in...

Year Published: 2021Topics: Emotion, Pain, & Sentience, HandlingAnimal Type: Rat, Rodent

Citation: Song, M. K., Lee, J. H., Kim, Y.-J. 2021. Effect of chronic handling and social isolation on emotion and cognition in adolescent rats. Physiology & Behavior 237, 113440.

Constructing and programming a cost-effective murine running wheel with digital revolution counter

Voluntary wheel running is a valuable metabolic intervention and well-established measure of physical activity in preclinical rodent models. Herein, we describe detailed assembly instructions and provide necessary resources for researchers to build their own running wheels from commercial-off-the-shelf parts and...

Year Published: 2021Topics: Environmental EnrichmentAnimal Type: Mouse, Rodent

Citation: Edwards, J., Olson, B., Marks, D.L. 2021. Constructing and programming a cost-effective murine running wheel with digital revolution counter. Lab Animal 50, 202-204.

Magnetic resonance imaging for early pregnancy diagnosis in the laboratory rat

Pregnancy diagnosis and embryo counting are important end points in reproductive, developmental biology and toxicology studies. The purpose of the present study was to assess the feasibility and efficacy of magnetic resonance imaging (MRI) for early pregnancy diagnosis and embryo...

Year Published: 2021Topics: ReproductionAnimal Type: Rat, Rodent

Citation: Ypsilantis, P., Souftas, V., Vyza, V. et al. 2021. Magnetic resonance imaging for early pregnancy diagnosis in the laboratory rat. Laboratory Animals 55(3), 262-269.

A real-time health notification system aimed at enhancing the interaction between animal care staff and researchers promotes animal welfare

Regardless of the microbiological status of an animal facility, research animals may experience health problems, leading to pain, suffering and distress. Simple and efficient tools are needed to collect data systematically, allowing researchers to react and resolve animals' health issues....

Year Published: 2021Topics: Welfare AssessmentAnimal Type: All/General, Chinchilla, Gerbil, Guinea Pig, Hamster, Mouse, Other Rodent, Rat, Rodent

Citation: Yatkin, E., Kulmala, N., Saukkonen, A. et al. 2021. A real-time health notification system aimed at enhancing the interaction between animal care staff and researchers promotes animal welfare. Laboratory Animals 55(3), 281-289.

Comparison of the effects of osmotic pump implantation with subcutaneous injection for administration of drugs after total body irradiation in mice

The increasing potential for radiation exposure from nuclear accidents or terrorist activities has intensified the need to develop pharmacologic countermeasures against injury from total body irradiation (TBI). Many initial experiments to develop and test these countermeasures utilize murine irradiation models....

Year Published: 2021Topics: Cannulation, Catheterization, & Intubation, Disease/Experimental Model, Drug/Substance AdministrationAnimal Type: Mouse, Rodent

Citation: Koch, A. L., Rusnak, M., Peachee, K. et al. 2021. Comparison of the effects of osmotic pump implantation with subcutaneous injection for administration of drugs after total body irradiation in mice. Laboratory Animals 55(2), 142-149.