title: Evaluation of five different suture materials in the skin of the earthworm (Lumbricus terrestris).
abstract: The purpose of this study was to determine which suture material is the most appropriate for dermal closure of terrestrial annelids. This paper describes the tissue reactions of the earthworm, Lumbricus terrestris, to five different types of suture materials in order to determine which suture material is the most appropriate for dermal closure. Silk, monofilament nylon, polydiaxonone, polyglactin 910, and chromic gut were studied. There was mild to moderate tissue reaction to all five suture materials. In all of the biopsies wound-healing reaction consisted of aggregates of blastemal cells which appeared in various stages of dedifferentiation from the body wall. Inflammatory cells infiltrated the wound sites, reminiscent of the typical foreign body reaction in vertebrates. The results indicate polyglactin 910 would be the best suture material with regards to tissue security and reaction scores. Chromic gut occupies the next position but there were problems with suture security over time. This appears to be the first suture material performance study on a terrestrial invertebrate. The earthworm, Lumbricus terrestris, was chosen for its wide availability, size, and the extensive species knowledge base. The earthworm may prove to be a good surgical/suture model for economically important invertebrates such as mollusks, tunicates, and insect larval stages.
authors.affiliation: Omaha's Henry Doorly Zoo and Aquarium, Nebraska, 68107 USA.
authors.forename: Melissa A
authors.initials: MA
authors.lastname: Salgado
authors.affiliation: North Carolina State University College of Veterinary Medicine, North Carolina, 27607 USA.
authors.forename: Gregory A
authors.initials: GA
authors.lastname: Lewbart
authors.affiliation: North Carolina Museum of Natural Sciences, Raleigh, North Carolina 27601 USA.
authors.forename: Larry S
authors.initials: LS
authors.lastname: Christian
authors.affiliation: Department of Statistics, North Carolina State University, North Carolina, 27695 USA.
authors.forename: Emily H
authors.initials: EH
authors.lastname: Griffith
authors.affiliation: North Carolina State University College of Veterinary Medicine, North Carolina, 27607 USA.
authors.forename: Jerry McHugh
authors.initials: JM
authors.lastname: Law
keywords: Earthworm; Healing; Immune response; Lumbricus terrestris; Suture material