Absolute Erythrocytosis in a Sunda Wrinkled Hornbill (Aceros corrugatus).

A captive, 22-year-old, intact male Sunda wrinkled hornbill (Aceros corrugatus) was presented for an acute onset of open-mouth breathing and bilaterally drooped wings. An external physical examination revealed a moderately thin body condition, marked respiratory effort, and a significant heart murmur. Diagnostic blood testing revealed moderate azotemia and persistent erythrocytosis, initially documented 2 years before this event. Radiographic imaging revealed a subjectively enlarged heart and a right dorsal coelomic cavity mass. Further diagnostic testing included an echocardiogram and ultrasound-guided fine-needle aspirate of the right coelomic cavity mass, with cytology consistent with a carcinoma. The bird was euthanatized because of the poor prognosis. Necropsy and histopathology identified right atrioventricular valve hypertrophy with severe hypertrophic and dilated cardiomyopathy of the right ventricular free wall, atherosclerosis of the great vessels and arteriosclerosis of myocardial vessels, severe hepatic extramedullary hematopoiesis, and pulmonary carcinoma of the right lung. In this case, erythrocytosis was considered a physiologic response to hypoxemia caused by the lung mass.

Variability in hematology of white-spotted bamboo sharks (Chiloscyllium plagiosum) in different living environments.

Elasmobranch hematology continues to reveal new peculiarities within this specialized field. This report compares total hematologic values from the same white-spotted bamboo sharks (Chiloscyllium plagiosum) housed in different environments. We compared the hemograms one year apart, using a standardized Natt-Herrick's technique. The total white blood cell (WBC) counts of the sharks were statistically different between the two time points (initial median total WBC count = 18,920 leukocytes/µl, SD = 8,108; 1 year later total WBC count = 1,815 leukocytes/µl, SD = 1,309). The packed cell volumes were additionally found to be statistically different (19%, SD = 2.9 vs. 22%, SD = 2.0). Analysis revealed the only differences between the time points were the temperature and stocking densities at which these sharks were housed. This report emphasizes the need for a thorough understanding of the husbandry of an elasmobranch prior to interpretation of a hemogram and suggests that reference intervals should be created for each environment.

The hemic response of white-spotted bamboo sharks (Chiloscyllium plagiosum) with inflammatory disease.

As elasmobranch medicine becomes more commonplace, there continues to be confusion with techniques and evaluation of the shark hemogram and it remains unknown if they are able to mount an inflammatory hemic response. The aims of this study were to compare two total white blood cell (WBC) count techniques, establish a reference interval for captive white-spotted bamboo sharks (Chiloscyllium plagiosum), and determine if elasmobranchs are capable of mounting an inflammatory hemic response. Correlation statistics were performed on hematologic results for healthy female bamboo sharks to assess the use of Natt-Herrick's and phloxine methods. Total WBC counts and differentials were obtained from males with severe traumatic clasper wounds and compared to the healthy females. We elected clasper amputation as the preferred treatment intervention and post-operative hematology was performed one month later. There was poor correlation of leukocyte counts between the two WBC count methods. Hematologic values were established for the females and males pre- and post-operatively. Males with wounds had a marked leukocytosis and heterophilia. Post-operative blood work showed a resolution of total WBC count and a trend toward resolution of the heterophilia. This study provides hematologic values for white-spotted bamboo sharks and confirms that the Natt-Herrick's method is preferred for lymphocytic species. Hematologic differences present in males with clasper wounds suggests that elasmobranchs do mount an inflammatory hemic response. Treatment via clasper amputation proved to be a safe and efficient means for clinical treatment that led to a trend toward resolution of the inflammatory leukogram. Zoo Biol. 35:251-259, 2016. © 2016 Wiley Periodicals, Inc.

Validation of an ultrasound-guided technique to establish a liver-to-coelom ratio and a comparative analysis of the ratios among acclimated and recently wild-caught southern stingrays, Dasyatis americana.

Southern stingrays, Dasyatis americana, are a well-represented elasmobranch species in public aquaria and other facilities throughout the world. This study was conducted at a facility that experienced some mortality and replenished the collection with wild-caught stingrays. A common necropsy finding among the stingrays was a small, dark liver. The objectives of this study were to assess the reliability of an ultrasound-guided technique for establishing a liver-to-coelom ratio by calculating the approximate length of the liver with respect to the coelomic cavity length and then to compare ratios between acclimated captive and wild-caught stingrays. The ultrasound validation phase of the study measured the distance from the caudal margin of the liver to the pelvic cartilaginous girdle and compared it to the actual distance measured during the necropsy or surgery. There was no significant difference found between the ultrasound and actual distance measurements (P = 0.945). This technique was then used to establish liver-to-coelom ratios and compare two groups of stingrays, presumably under different metabolic states at different periods. Liver-to-coelom ratios were established during initial examinations as well as 8 months after cohabitation in a touch pool exhibit. There were significant differences in liver-to-coelom ratios between the two stingray groups at introduction (median difference = 30.9%, P = 0.007) and after 8 months (median difference = 20.5%, P = 0.008). There were also significant differences in the liver-to-coelom ratios within each group at introduction and at 8 months (acclimated group median difference = 20.4%, P = 0.018; wild-caught group median difference 31%, P = 0.008).

Iridociliary melanoma with secondary lens luxation: distinctive findings in a long-horned cowfish (Lactoria cornuta).

This report describes a long-horned cowfish, which was diagnosed with buphthalmia and lens sub-luxation in the right eye, conditions that progressed to complete anterior lens luxation and secondary keratoconus. Three months after the initial evaluation, a pigmented mass was observed protruding from the vitreous. An enucleation was performed under general anesthesia. Ocular histopathology revealed an iridociliary melanoma. Reports of intraocular melanomas are extremely rare in fish. To the authors' knowledge, this is the first report of an iridociliary melanoma that led to buphthalmia, lens luxation, and keratoconus in a fish. Histological findings of lens luxation are also demonstrated. Due to the presence of a complex suspensory apparatus involving the teleost lens, this report speculates that lens luxation is a more devastating disease process in teleosts than in mammals.

Chronic cor pulmonale secondary to pulmonary atherosclerosis in an African Grey parrot.

CASE DESCRIPTION: A 20-year-old sexually intact female African Grey parrot (Psittacus erithacus) was evaluated to determine the cause of lethargy, hyporexia, weight loss, and persistent ascites of 21 days' duration. CLINICAL FINDINGS: Physical examination revealed a markedly distended abdomen and systolic heart murmur. Thoracic radiography revealed cardiomegaly and hepatomegaly. Doppler echocardiography revealed severe eccentric and concentric hypertrophy of the right ventricle with systolic dysfunction, moderate regurgitation through the right atrioventricular valve, a substantial increase in estimated systolic pulmonary arterial pressure, hepatic venous congestion, and coelomic effusion. A clinical diagnosis of chronic cor pulmonale was established. TREATMENT AND OUTCOME: The parrot was initially stabilized by use of coelomocentesis. During the next month, the parrot was treated by administration of furosemide, hydrochlorothiazide, spironolactone, benazepril, and pimobendan. The parrot appeared to be responding well to treatment but was found dead in its cage 35 days following initial examination. Postmortem examination revealed substantial atherosclerosis of the large pulmonary arteries, with lesions extending into the medium-size arteries. Pulmonary atherosclerosis was suspected as a cause of the severe pulmonary hypertension. CLINICAL RELEVANCE: Although atherosclerosis most commonly affects the systemic and coronary arteries of parrots, sclerotic changes within the pulmonary vasculature should be considered as a possible cause of pulmonary hypertension and as a differential diagnosis for right-sided congestive heart failure in psittacine species.

Long-term outcome of domestic ferrets treated surgically for hyperadrenocorticism: 130 cases (1995-2004).

OBJECTIVE: To determine the long-term survival rate and factors that affect survival time of domestic ferrets treated surgically for hyperadrenocorticism. STUDY DESIGN: Retrospective case series. ANIMALS: 130 ferrets with hyperadrenocorticism that were treated surgically. PROCEDURES: Medical records of ferrets surgically treated for hyperadrenocorticism were reviewed. Data recorded included signalment, duration of clinical signs prior to hospital admission, CBC values, serum biochemical analysis results, anesthetic time, surgical time, concurrent diseases, adrenal gland affected (right, left, or both [bilateral]), histopathologic diagnosis, surgical procedure, caudal vena caval involvement (yes or no), postoperative melena (yes or no), days in hospital after surgery, and whether clinical signs of hyperadrenocorticism developed after surgery. RESULTS: 130 ferrets were entered in the study (11 of 130 ferrets were admitted and underwent surgery twice). The 1- and 2-year survival rates were 98% and 88%, respectively. A 50% survival rate was never reached. Combined partial adrenal gland resection with cryosurgery had a significantly negative effect on survival time. No other risk factors were identified. Survival time was not significantly affected by either histopathologic diagnosis or specific affected adrenal gland (right, left, or bilateral). CONCLUSIONS AND CLINICAL RELEVANCE: Ferrets with adrenal gland masses that were treated surgically had a good prognosis. Survival time of ferrets with hyperadrenocorticism undergoing surgery was not affected by the histologic characteristic of the tumor, the adrenal glands affected (right, left, or bilateral), or complete versus partial adrenal gland resection. Debulking was a sufficient surgical technique to allow a favorable long-term outcome when complete excision was not possible.

Basics of cytology and fluid cytology.

Cytology as a diagnostic tool has played a major role in the management of diseases affecting domestic mammals for over 20 years. It has also become a valuable diagnostic tool in the evaluation of nondomestic or the so-called "exotic" animal patients, such as small mammals and the lower vertebrates. Common cytologic specimens used to evaluate the exotic animal patient include aspirates of masses and organs, imprints of biopsy material, tracheal wash samples, aspiration of abdominal or coelomic fluid, and fecal smears. In general, the same cytologic sample collection and preparation techniques used for domestic mammals also apply to exotic animal patients. The interpretation of the cytology specimen is generally the same as that of domestic mammals.

Biomedical evaluation of free-ranging ring-tailed lemurs (Lemur catta) in three habitats at the Beza Mahafaly Special Reserve, Madagascar.

Complete physical examinations and biomedical sample collection were performed on 70 free-ranging ring-tailed lemurs (Lemur catta) from three different habitats in the Beza Mahfaly Special Reserve (BMSR), in southern Madagascar, to assess the impact of humans and habitat on lemur health. Lemurs were chemically immobilized with ketamine and diazepam administered via blow darts for concurrent biomedical, morphometric, and behavioral studies. Subsets of the animals had blood analyzed for hematology, serum chemistry, micronutrients, fat-soluble vitamins (vitamins A, D, and E), measures of iron metabolism, and polymerase chain reaction assays (PCR) for Toxoplasma gondii, Hemoplasma spp., Bartonella spp., Ehrlichia spp., Anaplasma phagocytophilum, and Neorickettsia risticii. Results were compared on the basis of gender and the habitats at the study site: reserve (intact gallery forest), degraded (human inhabited and altered), and marginal (dry didieracea forest with heavy grazing and tree cutting). Levels of vitamin D, triglycerides, and cholesterol, and measures of iron metabolism for BMSR lemurs were greater than those previously reported for a free-ranging lemur population (Tsimanampetsotsa Strict Nature Reserve, Madagascar) with less access to foods of anthropogenic origin. BMSR ring-tailed lemurs from a habitat with less water (marginal) had higher sodium (P = 0.051), chloride (P = 0.045), osmolality (P = 0.010), and amylase (P = 0.05) levels than lemurs from other BMSR habitats, suggesting that these lemurs were less hydrated. Vitamin D levels of male lemurs were higher (P = 0.011) than those of females at BMSR, possibly because of differences in sunning behavior or differential selection of food items. The biological significance is uncertain for other parameters with statistically significant differences. All samples tested (n = 20) were negative for the pathogens tested using PCR assays. Continued concurrent biomedical and ecological research is needed at BMSR to confirm these results and determine their association with population mortality and fecundity rates.

Evaluation of the blood film.

Evaluation of hemic cell morphology in stained blood film may be the most important part of the hematologic evaluation of exotic animals. The blood film provides important information regarding red blood cell abnormalities, such as changes in cell shape and color, presence of inclusions, and, in the case of lower vertebrates, changes in the position of the cell nucleus. Stained blood film also provides information about changes in leukocyte numbers and morphology, and shows important hemic features of mammalian platelets and the thrombocytes of lower vertebrates. The blood film is needed in the detection and identification of blood parasites.

Evaluation of the Blood Film.

Evaluation of hemic cell morphology in stained blood film may be the most important part of the hematologic evaluation of exotic animals. The blood film provides important information regarding red blood cell abnormalities, such as changes in cell shape and color, presence of inclusions, and, in the case of lower vertebrates, changes in the position of the cell nucleus. Stained blood film also provides information about changes in leukocyte numbers and morphology, and shows important hemic features of mammalian platelets and the thrombocytes of lower vertebrates. The blood film is needed in the detection and identification of blood parasites.

Knemidokoptes in a Swainson's hawk, Buteo swainsoni.

A male Swainson's hawk (Buteo swainsoni) at a rehabilitation facility in Colorado was presented with severe crusting of the skin on the medial thighs and caudal ventral body. Male and female Knemidokoptes mites were found on a cellophane tape preparation of the affected area. The hawk's clinical signs resolved with treatment with ivermectin administered at 200 microg/kg, i.m., every 10 days for three treatments.