Abstract
OBJECTIVE
To measure baseline plasma corticosterone levels in Hispaniolan Amazon parrots (Amazona ventralis) and assess the effects of handling and restraint on corticosterone levels over 1 hour, reflective of what parrots might experience during veterinary care.
ANIMALS
10 male and 12 female Hispaniolan Amazon parrots.
PROCEDURES
Each parrot was removed from its cage and wrapped in a towel for restraint similar to that performed in a clinical setting. An initial baseline blood sample was collected in < 3 minutes upon entrance into the parrot room, after which blood samples were taken every 15 minutes for 1 hour (a total of 5 blood samples). An enzyme-linked immunoassay was validated for Hispaniolan Amazon parrots and used to determine concentrations of plasma corticosterone.
RESULTS
On average, parrots showed a significant increase in corticosterone between baseline samples and all subsequent postrestraint time points (average baseline corticosterone ± SD: 0.51 ± 0.65 ng/mL). Females, on average, displayed significantly higher corticosterone levels than males after 30, 45, and 60 minutes of restraint (P = .016, P = .0099, and P = .015, respectively). Birds with feather-destructive behavior did not have significantly higher corticosterone levels than birds without the condition (P = .38).
CLINICAL RELEVANCE
Understanding the physiological stress response in companion psittacine birds during routine handling will allow clinicians to better evaluate how this may affect the patient’s condition and diagnostic test results. Assessing how corticosterone correlates to behavioral conditions such as feather-destructive behavior will provide clinicians with the potential to develop treatment options.
Abstract
OBJECTIVE
Although research on animal hoarding, both in urban and rural settings, is growing, a gap remains in the literature about community patterns of animal ownership. Our objective was to determine patterns of companion animal ownership in a rural setting and the association between number of animals in a household and indicators of animal health.
SAMPLE
Retrospective review of veterinary medical records from 2009 to 2019 from a university-based community clinic in Mississippi.
PROCEDURES
Review of all owners who reported having animals from a household with 8 or more other animals on average, excluding animals from shelters, rescues, or veterinary practices. Across the study period, 28,446 unique encounters occurred among 8,331 unique animals and 6,440 unique owners. Indicators of care for canine and feline animals were taken from values indicated on the physical examination.
RESULTS
Animals were largely from single-animal households (46.9%) or households with 2 to 3 animals (35.9%). However, 2.1% of all animal cases reviewed lived in a household reported to have 8 or more animals, and 2.4% of canines and 4.3% of felines lived in a household with 8 or more animals. Increased animal ownership in the home correlated with worse health outcomes based on the health-care indicators investigated in canines and felines.
CLINICAL RELEVANCE
Veterinarians working in community settings are likely to encounter cases of animal hoarding and should consider collaborating with mental health practitioners if repeated incidences of negative health-care indicators occur for animals from the same household.
Abstract
OBJECTIVE
To identify challenges veterinarians faced during the COVID-19 pandemic, explore how they coped, identify coping strategies associated with greater resilience, and determine incentives and barriers to performing healthy coping behaviors.
SAMPLES
266 surveys completed by veterinarians in the Potomac region.
PROCEDURES
A cross-sectional survey was distributed electronically through veterinary medical boards and professional associations between June and September 2021.
RESULTS
Most survey responses came from veterinarians working in Maryland (128/266 [48%]) and Virginia (63/266 [24%]) who were predominantly white (186/266 [70%]), female (162/266 [61%]), and working in small-animal clinical practice (185/266 [70%]). The greatest workplace challenges experienced were increased workloads (195/266 [73%]) and reevaluating existing workflows (189/266 [71%]). Separation from loved ones (161/266 [61%]) was the greatest personal challenge. Of the veterinarians who completed the 10-point Connor-Davidson Resilience Scale (n = 219), which measures resilience on a scale from 0 (no resilience) to 40 (greatest resilience), the mean score was 29.6 (SD, 6.9), with a median of 30 (IQR = 10). Intrinsic factors most strongly associated with greater resilience were increasing age (P = .01) and later career stage (P = .002). Job satisfaction, autonomy, good work-life balance, and approach-focused coping strategies were positively associated with resilience. Overwhelmingly, the primary reported barrier to performing healthy coping behaviors was limited time to devote to self-care (177/266 [67%]).
CLINICAL RELEVANCE
A combination of individual approach-focused coping strategies and organizational interventions are crucial to support a resilient veterinary workforce.
Abstract
OBJECTIVE
To compare the elution characteristics of amikacin-impregnated calcium sulfate (CaSO4) beads based on different drug concentrations and bead size configurations.
SAMPLE
Six groups of amikacin-impregnated CaSO4 beads and one negative control group.
PROCEDURES
Amikacin-impregnated CaSO4 beads were formed with either 500 mg (low-concentration) or 1 g (high-concentration) of amikacin per 15 g CaSO4 hemihydrate powder. The number of beads necessary to approximate 150 mg of amikacin for each of the 3 bead sizes (3 mm, 5 mm, and 7 mm) at both low and high concentrations were placed in 6 mL of phosphate-buffered saline. The saline was sampled at 14 time points over 28 days. Amikacin concentrations were determined using liquid chromatography-mass spectrometry.
RESULTS
Smaller beads reached higher mean peak concentrations than larger beads (P < .0006). Peak concentrations for the low- and high-concentration groups were 20.5 mg/mL and 27.4 mg/mL, 13.1 mg/mL and 14.0 mg/mL, and 8.85 mg/mL and 6.75 mg/mL for the 3 mm, 5 mm, and 7 mm beads, respectively. Bead size also affected the length of therapeutic duration, lasting 6 days for the 3 mm and 5 mm beads and 9 days for the 7 mm beads. However, this was only statistically evident among the high-concentration beads (P < .044). Antimicrobial concentration within the same bead sizes did not affect elution.
CLINICAL RELEVANCE
Amikacin-impregnated CaSO4 beads achieved extreme supratherapeutic eluent concentrations. While additional studies are needed, bead size significantly affected elution with smaller beads reaching higher peak concentrations and 7 mm, high-concentration beads demonstrating a longer therapeutic duration than smaller beads.
Abstract
OBJECTIVE
To determine the pharmacokinetic parameters of hydromorphone hydrochloride and its metabolite, hydromorphone-3-glucuronide (H3G), after a single IV and IM dose in great horned owls (Bubo virginianus).
ANIMALS
6 healthy adult great horned owls (3 females and 3 males).
PROCEDURES
A single dose of hydromorphone (0.6 mg/kg) was administered once IM (pectoral muscles) and IV (left jugular) with a 6-week washout period between experiments. Blood samples were collected at 5 minutes and 0.5, 1.5, 2, 3, 6, 9, and 12 hours after drug administration. Plasma hydromorphone and H3G concentrations were determined with liquid chromatography–tandem mass spectrometry, and a noncompartmental analysis was used for the determination of pharmacokinetic parameters.
RESULTS
Hydromorphone had a high bioavailability of 170.8 ± 37.6% and rapid elimination after IM administration and rapid plasma clearance and a large volume of distribution after IV administration. Mean Cmax was 225.46 ± 0.2 ng/mL at 13 minutes after IM injection. Mean volume of distribution and plasma drug clearance was 4.29 ± 0.5 L/kg and 62.11 ± 14.6 mL/min/kg, respectively, after IV administration. Mean t1/2 was 1.62 ± 0.36 and 1.35 ± 0.59 hours after IM and IV administration, respectively. The metabolite H3G was readily measured shortly after administration by both routes.
CLINICAL RELEVANCE
A single dose of 0.6 mg/kg was well tolerated in all birds. Hydromorphone rapidly attained plasma concentrations following IM administration and had high bioavailability and short t1/2. This study is the first to document the presence of the metabolite H3G in avian species, which suggests similar hydromorphone metabolism as in mammals.
Abstract
OBJECTIVE
Determine the association between bovine leukemia virus (BLV) status and fertility in beef cows. BLV-status was defined using 3 different testing strategies (ELISA-, quantitative polymerase chain reaction- [qPCR], and high proviral load [PVL]-status). Fertility was defined as the overall probability of pregnancy as well as the probability of becoming pregnant in the first 21 days of the breeding season.
ANIMALS
Convenience sample of 2,820 cows from 43 beef herds.
PROCEDURES
The association of BLV-status with the probability of becoming pregnant was evaluated with a multivariable logistic regression analysis that used pregnancy status as a binary outcome, herd nested within ranch as a random effect, and BLV-status (ELISA-, qPCR-, and PVL-status as separate models) and potential covariates (eg, age, Body Condition Score [BCS] category, and interactions) as fixed effects.
RESULTS
Raw data revealed that 55% (1,552/2,820) of cows were classified as BLV-positive by ELISA, and 95.3% (41/43) of herds had a least 1 ELISA-positive cow. Classification as BLV ELISA-positive was positively associated with the probability of being pregnant; however, when qPCR or PVL were used to classify BLV-status, there was no association with the probability of being pregnant. None of the methods of classifying BLV-status were associated with the probability of becoming pregnant in the first 21 days of the breeding season.
CLINICAL RELEVANCE
This study did not find evidence that testing beef cows for BLV-status using ELISA, qPCR, or a cut-off of 0.9 PVL and removing test-positive cows will improve cowherd fertility as described by the probability of becoming pregnant during the breeding season or becoming pregnant during the first 21 days of the breeding season.
