A relationship was detected between the presence of embedded porcupine quills and the diagnosis of rabies in raccoons in eastern Canada during 1999-2004. No relationship was found between the presence of quills in raccoons and the diagnosis of canine distemper. Raccoons with embedded quills should be submitted for rabies testing.
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Trop Life Sci Res
October 2024
Indonesian Institute for Testing Standard Instrument of Veterinary, Bogor, West Java 16124, Indonesia.
J Morphol
November 2024
Departamento de Medicina Veterinária, Laboratório de Patologia e Histologia Veterinária, Faculdade de Medicina, Universidade Federal de Juiz de Fora, Minas Gerais, Brazil.
New World porcupines (Erethizontidae) exhibit behaviors and possess integumentary structures, including the quills, that are used for self-defense. The North American porcupine (Erethizon dorsatum) has been well studied regarding these features; however, information is lacking for the South American Coendou species. We describe the defensive behavior and integumentary morphology of Coendou spinosus to understand the defensive strategies of this species and to compare with those reported for other species.
View Article and Find Full Text PDFJ Zoo Wildl Med
September 2024
Janet L. Swanson Wildlife Hospital, Ithaca, NY, 14850.
The North American (NA) porcupine () is a rodent species with specialized hair structures called quills designed to detach and penetrate into tissues of any human or animal coming into contact with them. The objective of this study was to characterize the fungal flora of the quills in the region of the rosette in wild NA porcupines to further define health risks to NA porcupines and any animal coming into contact with the quills. A total of 17 adult NA porcupines were sampled, and fungal culture was performed.
View Article and Find Full Text PDFMaterials (Basel)
April 2024
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou 221018, China.
The mechanical properties of porcupine quills have attracted the interest of researchers due to their unique structure and composition. However, there is still a knowledge gap in understanding how these properties can be utilized to design biomimetic structures with enhanced performance. This study delves into the nanomechanical and macro-mechanical properties of porcupine quills, unveiling varied elastic moduli across different regions and cross sections.
View Article and Find Full Text PDFBioinspir Biomim
May 2024
School of Engineering, RMIT University, Melbourne VIC 3001, Australia.
This paper presents a novel approach for designing a freeform bending-resistant structure from the combination of explicit discrete component-based topology optimization (TO) and the porcupine quill-inspired features. To embed the porcupine quill's features into the TO formulations, the method involves constructing discrete components at various scales to imitate features including solid shell, stochastically distributed pores, and graded stiffeners. The components are iteratively updated, and the optimization process allows for the grading of quill-inspired features while achieving optimal structural compliance under bending loads.
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