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A 3-yr-old bearded dragon (Acanthodraco vitticeps) presented with lethargy, a swollen right elbow joint, inability to move its rear limbs normally, and marked leukocytosis. The majority of leukocytes were an abnormal mononuclear lymphoid-type cell with a high nuclear to cytoplasmic ratio, a slightly blue cytoplasm, nuclei with coarsely granular chromatin, and some nuclear clefts. Acute leukemia of lymphoid or myeloid origin was tentatively diagnosed. The abnormal mononuclear leukocyte cell population stained positively for the myeloid cytochemical stains: peroxidase, chloroacetate esterase, and L1-calprotectin. The abnormal cell population of the peripheral blood did not stain with the lymphoid cytochemical stains: alpha-naphthyl butyrate esterase, CD3, and CD79a.

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The clinical, gross necropsy, and histopathology findings in two unrelated desert grassland whiptail lizards (Cnemidophorus uniparens) with teratoma are described. The desert grassland whiptail is a parthenogenic lizard species with a polyploid chromosomal complement. The chromosome composition of the teratomas from these lizards was not determined.

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Blood samples were obtained from 155 North American river otters (Lontra canadensis; 94 adult males, 38 adult females, 10 juvenile males, and 13 juvenile females) to establish baseline hematology and from 50 adult river otters (40 males and 10 females) for baseline serum biochemistry parameters for the species. The otters were livetrapped from eastern North Carolina (USA) during a 4-yr period. Data for 14 routine hematologic parameters and 22 serum chemistry assays showed significant differences in total leukocyte count and absolute neutrophil and monocyte numbers for adults versus juveniles, red blood cell counts and hemoglobin between adult and juvenile males, and calcium and alkaline phosphatase values for adult males between years of the study and an increase in leukocyte counts and absolute neutrophils with increased degree of trap injury sustained.

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A Franklin-Silverman biopsy needle was used to obtain 2-5- x 1-2-mm mandibular salivary gland tissue samples percutaneously from nine North American river otters (Lutra canadensis). The samples were suitable for fluorescent antibody or polymerase chain reaction rabies testing. Ninety-two percent (11/12) of the biopsy procedures yielded histologically confirmed salivary gland tissue, and the remaining biopsy yielded adipose tissue. No complications were noted after 5-21 days.

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Sixteen horned puffin (Fratercula corniculata) and six parakeet auklet (Cyclorrhynchus psittacula) chicks of various prefledging ages were caught in Alaska and transported to the North Carolina Zoological Park (USA) in August 1995. Six of the 16 puffin chicks died within a 5-day period beginning 2 days after their arrival into quarantine at the zoo. The birds that died were collected at a young age, weighed 45.4-65.7 g, and had been fed a diet of thawed frozen ocean silversides (Atherinidae) that was not supplemented with vitamins. Clinical signs were nonspecific, and gross necropsies, insecticide toxicology screens, and bacterial cultures were unremarkable. Microscopic examination of tissues from five of the six birds showed myocardial necrosis and degeneration suggestive of vitamin E deficiency and intestinal protozoa resembling Microsporidia. The mortality pattern and histopathologic lesions observed in this case support the use of selective age capture and vitamin supplementation for wild alcid chick collection.

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The prevalence of antibody titers to Toxoplasma gondii in river otters (Lutra canadensis) from eastern North Carolina (USA) was investigated in a cross sectional study. Sera from 103 live trapped river otters were tested for antibodies to T. gondii using a commercially available latex agglutination kit. Forty-six (45%) of the sera were positive with titers ranging from 1:16 to > 1:2,048. Adult otters (n = 78) had a seroprevalence of 47% and juvenile otters (n = 25) had a seroprevalence of 39%. Significant differences were not found between the sexes within either maturity class. The high prevalence of antibodies to T. gondii indicates that many animals in this population were exposed to the organism. This suggests handling of otters may be a zoonotic concern for fur trappers.

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A study of a laboratory population (N = 60) of immature red pacu (Colossoma brachypomum) was conducted for the purpose of characterizing hematological parameters. Median (2.5th - 97.5th percentile) values obtained by hemocytometer counts, spun packed cell volume, refractometer, and differential counts were as follows: packed cell volume 25.8 (22.0 - 32.0) %, total plasma solids 4.0 (3.4 - 4.7) gm/dl, red blood cell concentration 1.68 (1.15 - 2.94) x 10(3) microliter, white blood cell concentration 33.5 (13.6 - 52.3) x 10(3) microliter, heterophils 3.2 (0.3 - 16.8) x 10(3) microliter, non-staining granulocytes 0.4 (0.05 - 1.9) x 10(3) microliter, eosinophils 0.2 (0.1 - 0.3) x 10(3) microliter, lymphocytes 21.0 (8.2 - 35.6) x 10(3) microliter, granular lymphocytes 1.4 (0.4 - 5.6) x 10(3) microliter, and monocytes 1.2 (0.4 - 4.4) x 10(3) microliter. Blood cell measurements were taken and descriptions given of the blood cells encountered on the stained smear A modified leukocyte slide estimate formula [(avg. # leukocytes/10 HPF x 2,000) + 6,3001 (/microliter) had better agreement with Neubauer hemocytometer white cell counts than the method used for avian species.