Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| mutations in bacterial genes induce unanticipated changes in the relationship between bacterial pathogens in experimental otitis media. | otitis media (om) is a common polymicrobial infection of the middle ear in children under the age of 15 years. a widely used experimental strategy to analyse roles of specific phenotypes of bacterial pathogens of om is to study changes in co-infection kinetics of bacterial populations in animal models when a wild-type bacterial strain is replaced by a specific isogenic mutant strain in the co-inoculating mixtures. as relationships between the om bacterial pathogens within the host are regulated ... | 2018 | 30564392 |
| perception of degraded speech by chinchillas (chinchilla laniger): word-level stimulus generalization. | one characteristic of human speech perception is a remarkable ability to recognize speech when the speech signal is highly degraded. it has been argued that this ability to perceive highly degraded speech reflects speech-specific mechanisms. the present study tested this hypothesis by measuring the ability of chinchillas to recognize noise-vocoded (nv) versions of naturally spoken monosyllabic words using operant conditioning in a stimulus generalization paradigm. chinchillas do not generalize t ... | 2019 | 30589293 |
| mandible strength and geometry in relation to bite force: a study in three caviomorph rodents. | the monophyletic group caviomorpha constitutes the most diverse rodent clade in terms of locomotion, ecology and diet. caviomorph species show considerable variation in cranio-mandibular morphology that has been linked to the differences in toughness of dietary items and other behaviors, such as chisel-tooth digging. this work assesses the structural strength of the mandible of three caviomorph species that show remarkable differences in ecology, behavior and bite force: chinchilla lanigera (a s ... | 2019 | 30768871 |
| some segmental morphological and morphometrical features of the intima and media of the aortic wall in chinchilla lanigera. | the aim of this study is to describe the morphology, morphometry and ultrastructure of segments of the thoracic and abdominal aorta portions in chinchilla lanigera. thickness measurements of the tunica intima and media complex of the aorta were taken. | 2019 | 30835342 |
| endoparasites of domesticated animals that originated in the neo-tropics (new world tropics). | this review serves to summarize parasites found in domesticated animals which were found in the neo-tropics. indigenous domesticated neo-tropical animals include south american camelids, (lama gunacoa, lama glama, lama pacos, vicuna vicuna), guinea pigs (cavia porcellus), chinchillas (chinchilla lanigera), turkeys (meleagris gallopavo) and ducks (cairina moschata, anas platyrhynchos, dendrocyga autumnalis). these animals were chosen due to their origin of existence (neo-tropics) and over time th ... | 2019 | 30845667 |
| morphological and morphometrical study of the auditory ossicles in chinchilla. | this study is meant to illustrate and describe the features of the auditory ossicles of the chinchilla (chinchilla lanigera), one of the species used more and more frequently in otology and ear surgery as animal model. cephalic extremities of 12 c. lanigera individuals obtained from a private farm, where this species was bred for fur, were used in this study. the ossicles were obtained either by direct surgical harvesting by mastoid approach or after a dermestid beetle exposure followed by anato ... | 2019 | 31041818 |
| infrared thermography as an indicator of heat loss in fur-chewing chinchillas (chinchilla lanigera). | fur-chewing is a common problem in chinchilla (chinchilla lanigera). it may affect the welfare of animals due to heat loss, thereby possibly impacting food and water intake to maintain body temperature. in this context, infrared thermography seems to be a suitable method of measuring heat emissions from the surface of objects. sexually mature male domestic chinchillas were divided into two groups: "non-fur chewers", exhibiting normal behaviour (n = 25), and "fur chewers" displaying fur-chewing b ... | 2020 | 31095420 |
| noninvasive ultrasound monitoring of embryonic and fetal development in chinchilla lanigera to predict gestational age: preliminary evaluation of this species as a novel animal model of human pregnancy. | ultrasound is a noninvasive routine method that allows real-time monitoring of fetal development in utero to determine gestational age and to detect congenital anomalies and multiple pregnancies. to date, the developmental biology of chinchilla lanigera has not yet been characterized. this species has been found to undergo placentation, long gestation, and fetal dimensions similar to those in humans. the aim of this study was to assess the use of high-frequency ultrasound (hfus) and clinical ult ... | 2019 | 31263384 |
| between-ear sound frequency disparity modulates a brain stem biomarker of binaural hearing. | the auditory brain stem response (abr) is an evoked potential that indexes a cascade of neural events elicited by sound. in the present study we evaluated the influence of sound frequency on a derived component of the abr known as the binaural interaction component (bic). specifically, we evaluated the effect of acoustic interaural (between-ear) frequency mismatch on bic amplitude. goals were to 1) increase basic understanding of sound features that influence this long-studied auditory potential ... | 2019 | 31314646 |
| in silico modeling of biofilm formation by nontypeable haemophilus influenzae in vivo. | biofilms formed by nontypeable haemophilus influenzae (nthi) bacteria play an important role in multiple respiratory tract diseases. visual inspection of the morphology of biofilms formed during chronic infections shows distinct differences from biofilms formed in vitro to better understand these differences, we analyzed images of nthi biofilms formed in the middle ears of chinchilla lanigera and developed an in silico agent-based model of the formation of nthi biofilms in vivo we found that, as ... | 2019 | 31366707 |
| the effect of fish and mealworm larvae meals as alternative dietary protein sources on nutrient digestibility and gastrointestinal function in chinchilla lanigera. | chinchillas are herbivores, but wild chinchillas may occasionally consume animal-based foods. the aim of this study was to determine the effect of fish meal (fm) and mealworm meal (mwm) included in complete pelleted diets on nutrient digestibility and gastrointestinal function in chinchillas. the experiment was performed on 24 male, divided into three groups, n=8. control group (c) was fed a diet containing 10% soybean meal (sbm). in the experimental group fm, chinchillas received a diet contain ... | 2020 | 31527335 |
| establishing an animal model of single-sided deafness in chinchilla lanigera. | (1) to characterize changes in brainstem neural activity following unilateral deafening in an animal model. (2) to compare brainstem neural activity from unilaterally deafened animals with that of normal-hearing controls. | 2019 | 31570054 |
| the moraxella catarrhalis phase-variable dna methyltransferase modm3 is an epigenetic regulator that affects bacterial survival in an in vivo model of otitis media. | moraxella catarrhalis is a leading cause of otitis media (om) and chronic obstructive pulmonary disease (copd). m. catarrhalis contains a type iii dna adenine methyltransferase (modm) that is phase-variably expressed (i.e., its expression is subject to random, reversible on/off switching). modm has six target recognition domain alleles (modm1-6), and we have previously shown that modm2 is the predominant allele, while modm3 is associated with om. phase-variable dna methyltransferases mediate epi ... | 2019 | 31818247 |
| cholinergic and adrenergic innervation of the pancreas in chinchilla (chinchilla laniger molina). | cholinergic and adrenergic innervation of the pancreas in chinchilla (chinchilla laniger molina) was examined in this study. the pancreas is both an exocrine and endocrine gland with autonomic and sensory innervation presented by the numerous nerve fibers and small agglomerations of nerve cells. | 2020 | 32202307 |
| update on diseases in chinchillas: 2013-2019. | chinchillas have been used mostly as fur animals and as animal models for human ontological diseases and only recently have been recognized as excellent, long-lived, and robust pet rodents. this review aims to provide updated information on emerging disease conditions in pet chinchillas, such as streptococcus equi subsp zooepidemicus and pseudomonas aeruginosa. furthermore, this review article provides updated information on previously documented disorders, such as urolithiasis and middle ear di ... | 2020 | 32327039 |
| diagnosis, surveillance and management of streptococcus equi subspecies zooepidemicus infections in chinchillas (chinchilla lanigera). | during a 6-mo period, two 5-6 mo old female chinchillas (chinchilla lanigera) were examined at the university of colorado anschutz medical campus after the discovery of firm, nonmobile masses in the left ventral cervical and left axillary region. other than these findings and mild weight loss, both chinchillas' physical exams were normal. bloodwork revealed an inflammatory leukogram characterized by leukocytosis, toxic neutrophils, lymphopenia, and monocytosis with mild, nonregenerative anemia. ... | 2020 | 32731906 |
| chinchilla (chinchilla lanigera) behavioral responses to a visual signal preceding handling. | zoos use ambassador animals in educational programs featuring close contact with humans. chinchillas (chinchilla lanigera) at the saint louis zoo are retrieved for programs by a keeper wearing brown handling gloves, but green cleaning gloves are worn during normal husbandry when physical contact with the animal is only incidental. the chinchillas' primary keeper anecdotally reported more reactivity and movement from chinchillas when approached with handling gloves. animals' behavioral reactions ... | 2020 | 32754909 |
| molecular identification of cryptosporidium isolates from ill exotic pet animals in japan including a new subtype in cryptosporidium fayeri. | cryptosporidium is an obligate intracellular parasite which can cause fatal diarrheal disease in exotic animals. sugar gliders (petaurus breviceps), hedgehogs (atelerix albiventris), chinchillas (chinchilla lanigera), and common leopard geckos (eublepharis macularius) are popular exotic animals commonly sold in pet shops in japan. we herein investigated the species and subtypes of cryptosporidium in these animals. cryptosporidium fayeri was detected in a sugar glider in a japanese animal hospita ... | 2020 | 32862916 |