| serodiagnosis of acute toxoplasmosis in macropods. | the sera of 34 australian macropods, the brains of which had been bioassayed for toxoplasma gondii, were used to establish that a titre greater than 1/32 was significant for a direct agglutination test against toxoplasmosis. in addition, the concentration of 2-mercaptoethanol required to destroy the igm fraction of macropod serum was confirmed in a modified direct agglutination test. to further validate the tests, the serological responses of three eastern grey kangaroos (macropus giganteus) dos ... | 1989 | 2588468 |
| prevalence of toxoplasma gondii antibody in wild macropods. | an enzyme-linked immunosorbent assay (elisa) was developed to measure total antibody to toxoplasma gondii in serum samples from macropods. the validity of the assay was established by comparing parasite isolation in mice for 17 tasmanian pademelons (thylogale billardierii) and 17 bennett's wallabies (macropus rufogriseus rufogriseus). the elisa was then used to detect antibody against t. gondii in serum from 236 macropods, collected from 21 locations in tasmania, including flinders island. antib ... | 1988 | 3421883 |
| genetic analysis of a documented population bottleneck: introduced bennett's wallabies (macropus rufogriseus rufogriseus) in new zealand. | few bottlenecks of wild populations are sufficiently well-documented to constitute models for testing theories about the impact of bottlenecks on genetic variation, and subsequent population persistence. relevant details of the bennett's wallaby (macropus rufogriseus rufogriseus) introduction into new zealand were recorded (founder number, source and approximate bottleneck duration) and suggest this may provide a rare opportunity to examine the efficacy of tests designed to detect recent bottlen ... | 2000 | 10849291 |
| characterization of 2-[125i]iodomelatonin binding sites in the brain of a marsupial, bennett's wallaby (macropus rufogriseus rufogriseus). | 1. specific high affinity binding of 2-[125i]iodomelatonin was detected in the brain of the pouch young of a marsupial, bennett's wallaby. 2. binding was rapid, stable, saturable and reversible. 3. scatchard analysis indicated a single class of high affinity binding sites with an equilibrium dissociation constant (kd) of 68 +/- 13 pm, a maximal number of binding sites (bmax) of 0.7 +/- 0.1 fmol/mg protein and a hill coefficient (nh) of 1.12 +/- 0.10. 4. specific binding was inhibited by gtp (1 m ... | 2005 | 1351824 |
| leishmania infantum infection in bennett's wallabies (macropus rufogriseus rufogriseus) in a spanish wildlife park. | although dogs are the main reservoir for human leishmania infantum infection, the disease has also been reported in other domestic and wild mammals. in 2011, a fatal case of naturally acquired leishmaniosis was described for the first time in a bennett's wallaby (macropus rufogriseus rufogriseus) kept in a wildlife park in madrid (spain). this study was designed to assess the infection status of twelve bennett's wallabies in the same park one year after this incident. phlebotomus perniciosus, th ... | 2016 | 27468032 |
| first description of onychomycosis caused by chrysosporium keratinophilum in captive bennett's wallabies (macropus rufogriseus rufogriseus). | seven bennett's wallabies (macropus rufogriseus rufogriseus) presented within a period of several months with onychodystrophy, onychomadesis, and severe digital tumefaction. histopathologic findings included a pseudocarcinomatous hyperplasia of the claw matrix surrounding a cavity filled with keratin and septate hyphae stained with periodic acid schiff reagent. the fungal species chrysosporium keratinophilum was identified on cultures. the wallabies were orally treated with ketoconazole (15 mg/k ... | 2011 | 22946390 |
| therapeutics of companion exotic marsupials. | exotic marsupials are becoming popular companion pets, yet little pharmacologic information is available to the practitioner. species include sugar gliders (petarus breviceps), south american (brazilian) short-tailed opossums (monodelphis domestica), brushtail possum or "phalanger" (trichosurus vulpecula), and wallabies: bennett's (macropus rufogriseus rufogriseus) and tammar or dama (macropus eugenii). guidelines for logical choices of medications based on allometric scaling, gastrointestinal t ... | 2000 | 11228826 |
| naturally acquired visceral leishmaniosis in a captive bennett's wallaby (macropus rufogriseus rufogriseus). | a high prevalence of leishmaniosis has been reported from an increasing number of domestic and wild mammals around the world. in australian macropods, leishmania spp infection has been occasionally described in its cutaneous form only. the purpose of this report is to present a case of fatal visceral leishmaniosis in a captive bennett's wallaby in madrid, spain, which was investigated by detailed macroscopic, histologic, and immunohistochemical examinations. | 2013 | 22692623 |
| sperm motility activation, sperm heterogeneity and sperm-female tract interactions in bennett's wallaby (macropus rufogriseus rufogriseus). | sperm-oviduct interactions in bennett's wallaby (macropus rufogriseus rufogriseus) were investigated using in vitro cocultures of cauda epididymal spermatozoa and oviducal epithelial cells. kidney epithelial cells were used as non-reproductive control tissues. spermatozoa attached to epithelial cells of both origins, but sperm survival and activity was higher when cocultured with oviducal cells. new findings during live sperm-epithelial interactions included: (1) a high frequency of reversible h ... | 2011 | 21557927 |
| hypertrophic cardiomyopathy in two captive bennett's wallabies (macropus rufogriseus rufogriseus). | hypertrophic cardiomyopathy (hcm) was diagnosed during postmortem examination of 2 captive adult bennett's wallabies (macropus rufogriseus rufogriseus). the wallabies were members of a mob (herd) of 3 wallabies, and 2 died spontaneously without clinical signs of heart failure being detected. gross lesions in both cases included marked concentric hypertrophy of the left ventricle, pulmonary edema, and multifocal hemorrhage and subcutaneous edema of the hind limbs. histologic lesions of the heart ... | 2009 | 19901297 |
| on the clinical chemistry of the bennett's wallaby (macropus rufogriseus rufogriseus). | the following parameters were determined in blood serum of apparently healthy bennett's wallabies (macropus rufogriseus) using the hitachi 917 (roche diagnostics, mannheim, germany) and/or the vettest 8008 (idexx-gmbh, woerrstadt, germany): alkaline phosphatase, alanine aminotransferase, ammonia, alpha-amylase, aspartate aminotransferase, ca, cl, cholesterol, cholinesterase, creatine kinase, creatinine, gammaglutamyltransferase, glucose, iron, lactate dehydrogenase, magnesium, phosphate, potassi ... | 2006 | 16856606 |
| use of antibiotic impregnated polymethylmethacrylate beads for the treatment of chronic mandibular osteomyelitis in a bennett's wallaby (macropus rufogriseus rufogriseus). | antibiotic impregnated polymethylmethacrylate beads were surgically implanted into the mandible of an adult bennett's wallaby (macropus rufogriseus rufogriseus) suffering from chronic mandibular osteomyelitis that had proven refractory to systemic antibiotic treatment. although a discrete inflammatory mass remained, clinical signs of inappetance and a discharging sinus were alleviated following implantation of the beads. this procedure resulted in a more satisfactory outcome than other methods o ... | 2003 | 15080484 |
| evidence for a circannual rhythm of reproduction and prolactin secretion in a seasonally breeding macropodid marsupial, the bennett's wallaby (macropus rufogriseus rufogriseus). | two groups of adult female wallabies were maintained in photoperiod-controlled rooms from june 1987 until august 1988. group ssh was held on summer solstice photoperiods throughout the experiment; group sn was subjected to weekly stepwise simulated natural changes in photoperiod. plasma melatonin concentrations reflected photoperiod with high concentrations during the dark phase in both groups. group sn wallabies commenced oestrous cyclicity on 21 july (+/- 19 days, n = 6) entered reproductive q ... | 1993 | 8410834 |
| seasonal and lactational effects on the prolactin response to a dopamine antagonist and trh in the bennett's wallaby (macropus rufogriseus rufogriseus). | in the bennett's wallaby prolactin is thought to maintain lactational and seasonal quiescence and is essential for early lactation. however, plasma prolactin concentrations determined in daily or weekly samples at these times are unchanged. in the present study, female bennett's wallabies were blood sampled at 2-hr intervals over a 24-hr period during seasonal quiescence on either natural or artificial photoperiods to determine whether a diurnal rise of prolactin occurs at this time. prolactin c ... | 1992 | 1601282 |
| melatonin implants prevent the onset of seasonal quiescence and suppress the release of prolactin in response to a dopamine antagonist in the bennett's wallaby (macropus rufogriseus rufogriseus). | three groups of adult female wallabies were maintained out of doors under conditions of natural photoperiod and temperature from late december to mid-august. one group (m1; n = 6) received silastic elastomer melatonin implants on 14 december, a second group (m2; n = 5) were given implants on 16 february and a third group (c; n = 7) were unimplanted controls. group c animals had all ceased cycling by 15 march and the subsequent breeding season commenced on 5 july +/- 6.9 days. group m1 wallabies ... | 1990 | 2250257 |
| roles of prolactin and the uterus in the control of luteal regression in the bennett's wallaby (macropus rufogriseus rufogriseus). | the factors responsible for controlling luteal regression in macropodid marsupials are unclear. experiments were designed to examine the role of the uterus and the pre-partum prolactin pulse in this process. in experiment 1, two groups of adult female bennett's wallabies were hysterectomized (n = 3) or sham-hysterectomized (n = 3) on day 16 of a non-pregnant oestrous cycle and daily peripheral blood samples were collected between days 10-37. in both groups, circulating progesterone concentration ... | 1990 | 2333390 |
| evidence that the seasonally breeding bennett's wallaby (macropus rufogriseus rufogriseus) does not exhibit short-day photorefractoriness. | adult female bennett's wallabies (n = 6) were maintained in artificial winter solstitial daylengths commencing 3 weeks before the winter solstice for 16 or 42 weeks. such treatment effectively prevented the normal establishment of seasonal reproductive quiescence with animals continuing to exhibit reproductive cycles beyond the time of the normal termination of the breeding season. animals maintained in natural photoperiods or simulated natural changes in daylength after the winter solstice all ... | 1989 | 2600914 |
| the role of refractorinesss to long daylength in the annual reproductive cycle of the female bennett's wallaby (macropus rufogriseus rufogriseus). | the beginning of the breeding season of the female bennett's wallaby occurs when seasonal quiescence terminates 1-2 months after the summer solstice. in this study, the role of photoperiod in terminating seasonal quiescence was examined. one week before the summer solstice, five non-lactating wallabies were transferred from natural to artificial summer solstice daylength for 5 months. the beginning of the breeding season in these animals as indicated by births, matings, and peripheral progestero ... | 1989 | 2600562 |
| effect of exogenous prolactin and bromocriptine on seasonal reproductive quiescence in the bennett's wallaby (macropus rufogriseus rufogriseus). | two experiments were performed to investigate whether prolactin blocks the reactivation of the corpus luteum during seasonal reproductive quiescence in the bennett's wallaby. in the first experiment three groups of non-lactating females (groups a c) were subjected in mid-april to photoperiods corresponding to those of the summer solstice from day 0 to day 13 of the experiment. between days 14 and 52, photoperiods were reduced to correspond to those of the winter solstice (groups b and c). animal ... | 1989 | 2926295 |
| effects of photoperiod on the 24-hour melatonin profiles of the bennett's wallaby (macropus rufogriseus rufogriseus). | the bennett's wallaby is a seasonal breeder in which photoperiod is an important proximate factor involved in regulating the timing of the breeding season. the present study was undertaken in order to describe the melatonin profiles of female wallabies under natural photoperiod and to examine the effects of abrupt changes in day length on the melatonin profile. under artificial and natural photoperiods, plasma melatonin concentrations were low or nondetectable during the day but increased after ... | 1988 | 3210138 |
| refractoriness to melatonin and short daylengths in early seasonal quiescence in the bennett's wallaby (macropus rufogriseus rufogriseus). | adult female bennett's wallabies were treated with reductions in daylength, melatonin implants or injections of melatonin 2 h before dusk in early or mid-seasonal reproductive quiescence. in early reproductive quiescence (5 weeks after the winter solstice) reproductive quiescence did not end in response to 3 or 5 h of reduced daylength or in response to injections (400 ng/kg) or implants (0.5 g in a silastic rubber envelope) of melatonin. reductions in daylength at this time of year did, however ... | 1987 | 3430471 |
| the onset of seasonal quiescence in the female bennett's wallaby (macropus rufogriseus rufogriseus). | the breeding season of the non-lactating bennett's wallaby terminates when animals enter the state of seasonal quiescence. to examine this transition, pouch young were removed from females at intervals which were 3, 4 or 8 weeks (6, 11 and 8 animals respectively) after the winter solstice. within 48 days, 3, 1 and 1 females gave birth respectively, indicating that these animals were not in seasonal quiescence when pouch young were removed. those animals which did not give birth were either in se ... | 1987 | 3598948 |
| effects of lactation and season on plasma prolactin concentrations and response to bromocriptine during lactation in the bennett's wallaby (macropus rufogriseus rufogriseus). | prolactin concentration was measured in plasma collected each week for 13 months from lactating and non-lactating bennett's wallabies (macropus rufogriseus rufogriseus). in non-lactating animals, prolactin concentrations decreased towards the end of the study but such changes did not appear to fit a seasonal pattern. prolactin concentrations were low during early lactation and at a similar level to non-lactating animals, increased significantly during late pouch life (february-may), and then ret ... | 1986 | 3755462 |
| plasma concentrations of progesterone, oestradiol-17 beta and 13,14-dihydro-15-oxo-prostaglandin f2 alpha in the pregnant wallaby (macropus rufogriseus rufogriseus). | the concentrations of progesterone and oestradiol-17 beta in the maternal plasma of bennett's wallaby, macropus rufogriseus rufogriseus, were measured daily throughout gestation after reactivation of the diapausing corpus luteum by removal of the suckling pouch young (rpy). progesterone increased from mean concentrations of 382-424 pmol/l (120-133 pg/ml) during lactation to reach peak concentrations of 908 +/- 172 (s.e.m.) pmol/l (285 +/- 54 pg/ml) (n = 8) 4 days after rpy and 971 +/- 220 and 97 ... | 1983 | 6864145 |