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https://www.readbyqxmd.com/read/28344561/fetal-growth-restriction-induces-heterogeneous-effects-on-vascular-biomechanical-and-functional-properties-in-guinea-pigs-cavia-porcellus
#1
Daniel Cañas, Emilio A Herrera, Claudio García-Herrera, Diego Celentano, Bernardo J Krause
Aim: Fetal growth restriction (FGR) is associated with a variety of cardiometabolic diseases in adulthood which could involve remodeling processes of the vascular walls that could start in the fetal period. However, there is no consensus whether this remodeling affects in a similar way the whole vascular system. We aimed to determine the effects of FGR on the vasoactive and biomechanical properties of umbilical and systemic vessels in fetal guinea pigs. Methods: FGR was induced by implanting ameroid occluders at mid-gestation in uterine arteries of pregnant guinea pigs, whilst the control group was exposed to simulated surgery...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28328950/repeated-anaesthesia-with-isoflurane-and-medetomidine-midazolam-fentanyl-in-guinea-pigs-and-its-influence-on-physiological-parameters
#2
Sabrina Schmitz, Sabine Tacke, Brian Guth, Julia Henke
Repeated anaesthesia may be required in experimental protocols and in daily veterinary practice, but anaesthesia is known to alter physiological parameters in GPs (Cavia porcellus, GPs). This study investigated the effects of repeated anaesthesia with either medetomidine-midazolam-fentanyl (MMF) or isoflurane (Iso) on physiological parameters in the GP. Twelve GPs were repeatedly administered with MMF or Iso in two anaesthesia sets. One set consisted of six 40-min anaesthesias, performed over 3 weeks (2 per week); the anaesthetic used first was randomized...
2017: PloS One
https://www.readbyqxmd.com/read/28166947/effects-of-heat-stress-on-some-reproductive-parameters-of-male-cavie-cavia-porcellus-and-mitigation-strategies-using-guava-psidium-guajava-leaves-essential-oil
#3
Ferdinand Ngoula, Maryvonne Guemdjo Tekam, Augustave Kenfack, Cyrille D'Alex Tadondjou Tchingo, Sandrine Nouboudem, Herman Ngoumtsop, Borice Tsafack, Alexis Teguia, Pierre Kamtchouing, Marco Galeotti, Joseph Tchoumboue
Climate changes, particularly the increase of temperature are among the main causes behind the decline of fertility in humans as well as animals. In this study, the effects of heat stress on some reproductive parameters of male cavies and mitigation strategies using guava leaves essential oil (GLEO) were studied. For this purpose, 40 male cavies aged 2.5-3 months and weighing between 348 and 446g were divided into 4 groups of 10 animals each and subjected to the following temperatures: Ambient temperature (20-25°C) for the control group, 35°C for group 1, 45°C for group 2 and 45°C+100µl GLEO/kg body weight, administered by gavage to animals for group 3...
February 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28064023/identification-and-characterization-of-a-gamma-interferon-inducible-lysosomal-thiol-reductase-homolog-from-guinea-pig-cavia-porcellus-that-exhibits-thiol-reductase-activity-in-vitro
#4
Lei Ma, Fang Cao, Runze Tang, Jiaxin Zhang, Shuangquan Zhang
Gamma-interferon-inducible lysosomal thiol reductase (GILT) is a key enzyme in the antigen processing and presentation pathway whereby it reduces disulfide bonds at an acidic pH. In this study, a homolog of GILT from guinea pigs (designated gpGILT) was identified and characterized using bioinformatic methods and bioactivity assays. The open reading frame of gpGILT is 705bp in length and encodes 234 amino acids, with a putative molecular weight of about 25.85kDa. The structure of gpGILT is similar to those of humans and zebrafish, containing six introns and seven exons...
December 28, 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/28008820/streptococcus-caviae-sp-nov-isolated-from-guinea-pig-faecal-samples
#5
Susakul Palakawong Na Ayudthaya, Loes J Hilderink, John van der Oost, Willem M de Vos, Caroline M Plugge
A novel cellobiose-degrading and lactate-producing bacterium, strain Cavy grass 6T, was isolated from faecal samples of guinea pigs (Cavia porcellus). Cells of the strain are oval-shaped, non-motile, non-spore-forming, stain Gram-positive and facultative anaerobic. The strain grows between 25 - 40oC (optimum is 37oC) and pH 4.5 - 9.5 (optimum is 8.0). Phylogenetic analysis based on 16S rRNA gene sequence showed that strain Cavy grass 6T belongs to the genus Streptococcus with its closest relative being Streptococcus devriesei CCUG 47155T with only 96...
December 23, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27931318/pharmacokinetics-and-paw-withdrawal-pressure-in-female-guinea-pigs-cavia-porcellus-treated-with-sustained-release-buprenorphine-and-buprenorphine-hydrochloride
#6
Brian J Smith, Daniel J Wegenast, Ryan J Hansen, Ann M Hess, Lon V Kendall
Providing appropriate analgesia is essential in minimizing pain and maintaining optimal animal care and welfare in laboratory animals. Guinea pigs are common animal models in biomedical research, often requiring analgesic support. Here we evaluated the pharmacokinetics and efficacy of a sustained-release formulation of buprenorphine (Bup-SR) in this species. Guinea pigs (n = 7 each group) received either Bup-HCl (0.05 mg/kg BID for 3 d) or Bup-SR (0.3 mg/kg once). Plasma collection and measurement of paw-withdrawal pressure (PWP) was conducted at 0, 1, 3, 6, 12, 26, 48, and 72 h after treatment...
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27901456/partial-gastrectomy-for-resection-of-a-gastric-leiomyoma-in-a-guinea-pig-cavia-porcellus
#7
Sara M Gardhouse, David Sanchez-Migallon Guzman, Miranda J Sadar, Anthony J DeRouen, Daniel S Bucy, Adeyemi O Adedeji, William Vernau, Kerriann M Casey, F Charles Mohr, Michele A Steffey
CASE DESCRIPTION A 4-year-old sexually intact male pet guinea pig (Cavia porcellus) was evaluated for a routine wellness examination. CLINICAL FINDINGS During physical examination, a small mass was palpated in the cranial aspect of the abdomen. Abdominal radiographic and ultrasonographic findings were suggestive of a gastric mass. Cytologic evaluation of a fine-needle aspirate of the mass was indicative of spindle cell proliferation most consistent with a sarcoma. TREATMENT AND OUTCOME The patient was anesthetized, and an exploratory laparotomy and partial gastrectomy were performed to resect the gastric mass...
December 15, 2016: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/27876917/treatment-and-control-of-trixacarus-caviae-infestation-in-a-conventional-guinea-pig-cavia-porcellus-breeding-colony
#8
Anjan Jyoti Nath
A case of sarcoptic mange caused by Trixacarus caviae in a conventional guinea pig breeding colony is reported. The infestation was reported in a large colony of guinea pigs during the month of July, 2013 affecting 30 breeder guinea pigs. Severely infested animals were treated individually with subcutaneous injection of ivermectin 1 % w/v (Neomec(®)) at the rate of 400 µg/kg body weight 10 days apart. Three doses of ivermectin were sufficient to eliminate the parasite which tested negative after 30 days of the first treatment...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27854241/an-investigation-into-the-relationship-between-owner-knowledge-diet-and-dental-disease-in-guinea-pigs-cavia-porcellus
#9
Rosemary Norman, Alison P Wills
Recent studies have highlighted a high prevalence of dental disease in domestic guinea pigs, yet the aetiology of this multi-factorial disease is still unclear. Factors that have been associated with dental disease include feeding a diet that is high in energy but low in fibre, feeding an insufficiently abrasive diet, a lack of dietary calcium, and genetics. As many of these factors relate to the husbandry requirements of guinea pigs, owner awareness of dietary requirements is of the utmost importance. An online questionnaire was created based on previous research into the husbandry and feeding of rabbits...
November 14, 2016: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/27779826/mystacial-whisker-layout-and-musculature-in-the-guinea-pig-cavia-porcellus-a-social-diurnal-mammal
#10
Robyn A Grant, Mariane G Delaunay, Sebastian Haidarliu
All mammals (apart from apes and humans) have whiskers that make use of a similar muscle arrangement. Whisker specialists, such as rats and mice, tend to be nocturnal and arboreal, relying on their whisker sense of touch to guide exploration around tree canopies at night. As such, nocturnal arboreal rodents have many whiskers that are organised into a grid-like pattern, and moved using a complex array of muscles. Indeed, most arboreal, nocturnal mammals tend to have specialised whiskers that are longer and arranged in a dense, regular grid, compared to terrestrial, diurnal mammals...
October 25, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27771802/evaluation-of-the-infectivity-and-the-persistence-of-trichinella-patagoniensis-in-muscle-tissue-of-decomposing-guinea-pig-cavia-porcellus
#11
F Fariña, M Pasqualetti, J Ilgová, N Cardillo, M Ercole, T Aronowicz, S Krivokapich, M Kašný, M Ribicich
Trichinella patagoniensis, a new species of Trichinella, is widespread in Argentina. The success of parasite transmission depends, among other factors, on the resistance of L1 larvae present in the muscle tissue (ML) of dead hosts undergoing the decomposition process in different environmental conditions. The aim of the present work was to study the infectivity of T. patagoniensis muscle larvae in Cavia porcellus and the capability of the parasite to survive in decomposed muscle tissue of guinea pigs subjected to different environmental conditions...
January 2017: Parasitology Research
https://www.readbyqxmd.com/read/27730208/morphometric-evaluation-of-wound-healing-in-burns-treated-with-ulmo-eucryphia-cordifolia-honey-alone-and-supplemented-with-ascorbic-acid-in-guinea-pig-cavia-porcellus
#12
Carolina Schencke, Adriana Vasconcellos, Cristian Sandoval, Paulina Torres, Francisca Acevedo, Mariano Del Sol
BACKGROUND: In the context of the search for cost-efficient treatments, Ulmo (Eurcyphia cordifolia) honey is an excellent alternative for treating burn wounds and could have a profound medical, social, and economic impact. Ascorbic acid is an enzymatic co-factor necessary for the synthesis of collagen and the proliferation of fibroblasts and has been proposed as a coadjuvant to strengthen the healing effects of honey. The aim of this work was to evaluate by morphometric studies the healing wounds caused by burns treated with Ulmo honey alone and supplemented with ascorbic acid in guinea pig (Cavia porcellus)...
2016: Burns and trauma
https://www.readbyqxmd.com/read/27706659/molecular-cloning-overexpression-purification-and-sequence-analysis-of-the-giant-panda-ailuropoda-melanoleuca-ferritin-light-polypeptide
#13
L Fu, Y L Hou, X Ding, Y J Du, H Q Zhu, N Zhang, W R Hou
The complementary DNA (cDNA) of the giant panda (Ailuropoda melanoleuca) ferritin light polypeptide (FTL) gene was successfully cloned using reverse transcription-polymerase chain reaction technology. We constructed a recombinant expression vector containing FTL cDNA and overexpressed it in Escherichia coli using pET28a plasmids. The expressed protein was then purified by nickel chelate affinity chromatography. The cloned cDNA fragment was 580 bp long and contained an open reading frame of 525 bp. The deduced protein sequence was composed of 175 amino acids and had an estimated molecular weight of 19...
August 30, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27698164/isolation-and-identification-of-caviibacter-abscessus-from-cervical-abscesses-in-a-series-of-pet-guinea-pigs-cavia-porcellus
#14
David A Bemis, Brian H Johnson, Mary Jean Bryant, Rebekah D Jones, Brynn V McCleery, Cheryl B Greenacre, Vincent Perreten, Stephen A Kania
An organism reported in the early literature to be a rare cause of cervical lymphadenitis in guinea pigs, Streptobacillus moniliformis, has been reclassified as Caviibacter abscessus We describe a series of sequential cases of abscesses in guinea pigs that were presented to our clinic from which the only agent isolated was a unique, serum-requiring bacterium. Discrete colonies were not detected in 6.5% CO2 or anaerobically on routine primary isolation media containing up to 5% whole sheep blood, with and without cysteine, vitamin K, and hemin supplementation after 7 days of incubation at 37°C...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27583446/evaluation-of-using-behavioural-changes-to-assess-post-operative-pain-in-the-guinea-pig-cavia-porcellus
#15
Yvette Ellen, Paul Flecknell, Matt Leach
To manage pain effectively in people and animals, it is essential to recognise when pain is present and to assess its intensity. Currently there is very little information regarding the signs of post-surgical pain or its management in guinea pigs. Studies from other rodent species indicate that behaviour-based scoring systems can be used successfully to detect pain and evaluate analgesic efficacy. This preliminary study aimed to establish whether behaviour-based scoring systems could be developed to assess post-surgical pain in guinea pigs...
2016: PloS One
https://www.readbyqxmd.com/read/27557646/multispecies-purification-of-testicular-germ-cells
#16
Ana C Lima, Min Jung, Jannette Rusch, Abul Usmani, Alexandra Lopes, Donald F Conrad
Advanced methods of cellular purification are required to apply genome technology to the study of spermatogenesis. One approach, based on flow cytometry of murine testicular cells stained with Hoechst-33342 (Ho-FACS), has been extensively optimized and currently allows the isolation of 9 germ cell types. This staining technique is straightforward to implement, highly effective at purifying specific germ cell types and yields sufficient cell numbers for high throughput studies. Ho-FACS is a technique that does not require species-specific markers, but whose applicability to other species is largely unexplored...
August 24, 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/27450280/guinea-pig-cavia-porcellus-drinking-preferences-do-nipple-drinkers-compensate-for-behaviourally-deficient-diets
#17
A Balsiger, M Clauss, A Liesegang, B Dobenecker, J-M Hatt
When offered diets with hay ad libitum, rabbits (Oryctolagus cuniculus) clearly prefer open dishes over nipple drinkers, but whether this preference also applies in guinea pigs (Cavia porcellus) is unsure. We tested the drinker preference of 10 guinea pigs when offered open dishes (OD) and nipple drinkers (ND) simultaneously and measured the amount of water consumed by each animal on four different diets (grass hay 100%, or as 10% of intake on diets of fresh parsley, seed mix or pelleted complete feed, respectively) on either of the drinking systems...
July 23, 2016: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/27423156/intraocular-pressure-tear-production-and-ocular-echobiometry-in-guinea-pigs-cavia-porcellus
#18
Seyed Mehdi Rajaei, Maneli Ansari Mood, Reza Sadjadi, Farzaneh Azizi
The purpose of this study was to evaluate intraocular pressure (IOP) by means of rebound tonometry, to assess tear production by using the endodontic absorbent paper point tear test (EAPTT) and phenol red thread test (PRTT), and to determine the effects of time of day on IOP and tear production in guinea pigs. The study population comprised 24 healthy adult guinea pigs (12 male, 12 female; 48 eyes) of different breeds and ranging in age from 12 to 15 mo. IOP and tear production were measured at 3 time points (0700, 1500, and 2300) during a 24-h period...
2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27373957/unilateral-flank-ovariohysterectomy-in-guinea-pigs-cavia-porcellus
#19
D Rozanska, P Rozanski, M Orzelski, N Chlebicka, K Putowska
AIMS: To describe a simple, minimally invasive method of ovariohysterectomy via a unilateral flank approach in guinea pigs, for use in routine desexing of healthy female guinea pigs or treatment of ovarian cysts. METHODS: The subjects of this retrospective study were 41 client-owned guinea pigs submitted for routine desexing or treatment of ovarian cysts. They included 16 healthy female guinea pigs aged 8-12 months (Group 1), and 15 females aged from 9 months to 3 years (Group 2), and 10 females aged from 3 to 7 years (Group 3) with different-sized ovarian cysts...
November 2016: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/27324689/skin-diseases-in-companion-guinea-pigs-cavia-porcellus-a-retrospective-study-of-293-cases-seen-at-the-veterinary-medical-teaching-hospital-university-of-california-at-davis-1990-2015
#20
Stephen D White, David Sanchez-Migallon Guzman, Joanne Paul-Murphy, Michelle G Hawkins
BACKGROUND: Guinea pigs (Cavia porcellus) are popular companion animals with reported skin diseases, but most reports are accessed from textbooks or review articles. HYPOTHESIS/OBJECTIVES: To document skin diseases and their prevalence in companion guinea pigs in northern California, USA, and to investigate predilections for the most common conditions over a 25 year period. ANIMALS: Two hundred and ninety three guinea pigs from the hospital population met inclusion criteria...
October 2016: Veterinary Dermatology
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