著者

Akiyoshi HAYASHI Hiroshi TANAKA Tomoko TAJIMA Masanari NAKAYAMA Fumihito OHASHI

出版者

JAPANESE SOCIETY OF VETERINARY SCIENCE

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.12-0375, (Released:2012-11-02)

被引用文献数

1 6

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A seven-year-old spayed female domestic short-haired cat presented with dysuria and hematuria having been unresponsive to medical therapy. Some imaging tests such as ultrasonography, urethrocystography and computed tomography revealed the pelvic mass compressing urethra. Based on histological examination of the mass following surgical resection, the cat was diagnosed squamous cell carcinoma (SCC) derived from uterine remnant. After surgery, dysuria was resolved, but on instead, urine and fecal incontinence were observed. Then, about four months after surgery, recurrence of the mass and the symptoms was observed. Consequently, the cat was ultimately euthanized. This is the first report of SCC arising from the uterine remnant in a spayed female cat.

著者

Yasutsugu MIWA Makoto NAKATA Asuka KUROSAWA Hiroshi SASAI Nobuo SASAKI

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.70, no.12, pp.1323-1326, 2008 (Released:2009-01-01)

参考文献数

14

被引用文献数

2 11

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Adrenal diseases are quite common in Japanese pet ferrets; however, there have been no reports concerning the epidemiology of ferret adrenal disease in Japan. The purpose of this study was to collect epidemiological data on ferret adrenal disease in Japan by sending a questionnaire to veterinarians throughout Japan. Among the 521 cases that met the criteria for this study, 307 were adrenocortical carcinoma (58.9%), 117 were adrenocortical adenoma (22.5%) and 87 were adrenocortical hyperplasia (16.7%), respectively. Sex, clinical signs, concurrent diseases, age and the sites of the affected adrenal gland in these cases were similar to those reported in North America. Most pet ferrets in Japan are imported from North America, and their husbandry in Japan is similar to that in North America, which may be the cause of the similarity in ferret adrenal disease between North America and Japan. Because a difference in the incidence of ferret adrenal diseases among countries has been reported, further research is necessary to investigate the factors related to the similarities and how to decrease the incidence of adrenal diseases in ferrets in Japan.

著者

Nobuhito HAYASHIMOTO Hideaki YOSHIDA Kazuo GOTO Akira TAKAKURA

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.70, no.5, pp.493-495, 2008 (Released:2008-06-04)

参考文献数

12

被引用文献数

5 10 1

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We isolated Streptobacillus moniliformis, the causative agent of rat-bite fever in humans, from the salivary gland of a pet rat postmortem. The isolate was a Gram-negative pleomorphic coccobacillus, which produced acid from glucose and showed enzymatic activities for eight items in the API ZYM system. The results were consistent with those of the reference strain, ATCC 14647T, except for acid production from dextrin. Partial sequencing of 16S rRNA (1,440 bp) and gyrB genes (514 bp) of the isolate revealed similarities of 100% and 99.8%, respectively, to those of S. moniliformis in GenBank. Therefore, the isolate was identified as S. moniliformis. These results suggested the potential risk of rat-bite fever arising from pet rats in Japan.

著者

Momoko TANIGAWA Yukita SATO Hiroko EJIRI Takayuki IMURA Rei CHIBA Hanae YAMAMOTO Makoto KAWAGUCHI Yoshio TSUDA Koichi MURATA Masayoshi YUKAWA

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.12-0359, (Released:2012-10-31)

被引用文献数

3 19

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We investigated for the first time the prevalence of avian haemosporidia of genera Plasmodium, Haemoproteus, and Leucocytozoon among birds and mosquitoes on Tsushima Island of Japan, which is located between Japan and the Korean Peninsula. Of 55 wild birds belonging to 33 species, 16 (29.1%) tested positive for haemosporidia as follows: Plasmodium spp. (11/55; 20.0%); Haemoproteus spp. (2/55; 3.6%); and Leucocytozoon spp. (3/55; 5.5%). A genetic lineage isolated from the Eurasian Sparrowhawk (Accipiter nisus) was identical to that of the known avian malaria parasite P. circumflexum. Several genetic lineages were identical or closely related to the parasite lineages that were previously detected in birds and mosquitoes in Japan and Korea. Another single identical genetic lineage was also detected in both migratory and resident birds. A total of 753 mosquitoes from 12 species were collected; and one fully fed Aedes albopictus was positive for avian Plasmodium (1/753; 0.13%) which is identical to a genetic lineage detected in both mosquitoes in Japan and birds in Korea. Blood-meal identifications of blood-fed mosquitoes showed direct contact between the mosquitoes and 4 species of mammals including humans, cattle, rodents, and the endangered Tsushima leopard cat (Prionailurus bengalensis euptilura). Migratory birds use Tsushima Island as a site for wintering, breeding, and resting, and our results suggest the transmission of avian haematozoa between resident and migratory birds during their stay on Tsushima Island.

著者

Manabu KOIKE Yasutomo YUTOKU Aki KOIKE

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.12-0112, (Released:2012-05-23)

被引用文献数

3 7

---

In clinical settings, cellular resistance to chemotherapy and radiotherapy is a significant component of tumor treatment failure. The mechanisms underlying the control of localization of DNA repair proteins play a key role in the regulation of DNA repair activity. The DNA repair protein XRCC4, which is a regulator of DNA ligase IV activity, might be a key contributor to chemoresistance to not only anticancer agents, e.g., etoposide, but also radioresistance. However, it is remains unclear whether XRCC4, which is a key player in nonhomologous DNA-end-joining (NHEJ), plays a role in low-dose radioresistance. In this study, we confirmed that human XRCC4 tagged with the enhanced green fluorescent protein (EGFP-XRCC4), as well as the DNA damage sensor Ku80 tagged with EGFP, mainly localized in the nuclei and its accumulation at DNA damaged sites began immediately after microirradiation. Moreover, we generated and characterized cell lines expressing EGFP-XRCC4 in XRCC4-deficient cells, i.e., XR-1 cells derived from the Chinese hamster ovary. Our findings showed that XR-1 cells were more sensitive than controls (CHO-K1) to low-dose X-irradiation (<0.5 Gy), whereas the radiosensitive phenotype of XR-1 cells was rescued by the expression of EGFP-XRCC4. We also confirmed that EGFP-XRCC4 expressed stably in XR-1 cells stabilizes DNA ligase IV. Altogether, these cell lines might be useful for the study of not only the dynamics and function of XRCC4, but also the molecular mechanism underlying the cellular resistance via the NHEJ pathway to low-dose radiation in mammalian cells.

著者

Pierluigi IMBIMBO Lorenzo CASTIGLIEGO Andrea ARMANI Bartolomeo BIOLATTI Francesca Tiziana CANNIZZO Daniela GIANFALDONI Alessandra GUIDI

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.11-0489, (Released:2012-05-22)

被引用文献数

2 3

---

A gross pathology and histological investigation was carried out on bovine target organs of anabolic substances in the Molise Region (Italy). One hundred forty-four bovines (12–24 months old, 123 males and 21 females) were included in the survey. Ante-mortem assessment on their behaviour and clinical examination was performed. After slaughtering, samples of prostate, Cowper’s glands, Bartholin’s glands, mammary gland, ovaries, thymus and thyroid were collected, inspected and processed for histopathology, as suggested in the guidelines of the Italian national program for residue surveillance (PNR). Overall, 15.3% of examined animals have been classified as “suspect,” whereas 44.4% as “uncertain” and the remaining 40.3% as “negative”. The most frequent lesion was a severe thymus atrophy with fat infiltration (15.4% of males and 14.3% of females), strongly suggesting the illegal use of corticosteroids.

著者

Yusaku WATANABE Masatoshi FUJIHARA Jin SUZUKI Fumina SASAOKA Kazuya NAGAI Ryô HARASAWA

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.12-0096, (Released:2012-05-22)

被引用文献数

1 10 3

---

Hemoplasma is a tribal name for epierythrocytic mycoplasmas including Mycoplasma suis and M. parvum which are currently recognized in pigs as causative of porcine hemoplasmosis. Here we report a real-time PCR assay for differential detection of these swine hemoplasma species by using allelic primers in the16S rRNA gene, and its application to survey for hemoplasma infections in pigs. Universal primers and species-specific primers were designed and evaluated by using swine blood samples positive in hemoplasmas. Mycoplasma suis and M. parvum infections were both confirmed by universal primers and mixed infections were clearly distinguished by species-specific primers. Further, we applied this real-time PCR assay to 120 swine blood specimens from clinically healthy pigs in eleven farms in Japan, and found six (5.0%) were positive for M. suis and 18 (15.0%) were positive for M. parvum, and three (2.5%) were mixed infection by both hemoplasma species.

著者

Atsushi YABUZOE Koji NISHIFUJI Maiko SEKIGUCHI Atsushi SHIMIZU Yasuyuki MOMOI Akira ISHIKO Toshiroh IWASAKI

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.70, no.8, pp.807-812, 2008 (Released:2008-09-05)

参考文献数

19

被引用文献数

3 8

---

Pemphigus foliaceus (PF) is an autoimmune blistering skin disease that affects certain mammals including dogs. In canine PF, neutrophils are infiltrated intensely into pustular lesions including acantholytic cells, although neutrophilic infiltration is not characterized in human PF. The roles of the neutrophils in the cutaneous lesions of canine PF have not yet been understood. The purpose of this study was to characterize the ultrastructural features underlying the acantholysis with pustule formation in canine PF. Four dogs diagnosed as PF on the basis of clinical signs, histopathological findings, and direct and indirect immunofluorescence examinations were performed. Electron microscopy revealed that the acantholytic cells were adjacent to multiple neutrophils in the pustules. At the contact points between neutrophils and acantholytic keratinocytes, half-desmosomes of acantholytic keratinocytes with intact attachment plaques were observed within invaginations of neutrophils. Furthermore, on the surface of acantholytic cells in the pustules, neutrophil granules seemed to be secreted to the surface of acantholytic cells and to degenerate the half-desmosome structures. Neutrophils were also observed within the epidermis adjacent to the pustule. At the intercellular gap between two dissociated keratinocytes, neutrophils inserted its pseudopodia into the gap between the two half-desmosomes of keratinocytes. These findings taken together suggested that, at least in the areas where we analyzed ultrastructurally, neutrophils contact desmosomal structures and seem to play some parts in separation of keratinocytes and degeneration of split-desmosomes in pustules of dogs with PF.

著者

Teruo ITOH Kazumi NIBE Atsuko KOJIMOTO Mayumi MIKAWA Kazuhiro MIKAWA Kazuyuki UCHIDA Hiroki SHII

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.68, no.8, pp.869-871, 2006 (Released:2006-09-05)

参考文献数

9

被引用文献数

7 15 13

---

A 5-year-old female border collie presented with erythematous skin lesions at the axillae, groin, mucocutaneous junctions, and pinnae. Biopsy revealed lymphocytic interface dermatitis with hydropic degeneration of basal cells and keratinocyte apoptosis. Based on gross and histological features, diagnosis of erythema multiforme was made. The disease was resolved by treatment with azathioprine, prednisolone, and a hypoallergenic diet. Finally, the skin lesion was controlled without drug therapy but recurred easily every time commercial foods except the hypoallergenic diet were used, suggesting that food substances triggered this outbreak.

著者

Kyaw Kyaw MOE Takahisa YANO Atsutoshi KUWANO Satomi SASAKI Naoaki MISAWA

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.72, no.2, pp.235-239, 2010 (Released:2010-03-03)

参考文献数

17

被引用文献数

10 20

---

Equine canker is a chronic pododermatitis of the hoof in horses. Although spirochetes are detectable histopathologically in the lesions, the precise etiology remains unclear. This study reports the 16S rRNA gene sequencing of randomly selected clones based on PCR with Treponema-specific primers, using the canker lesions from two horses and healthy frog and sole from a horse. A total of 114 clones were obtained from the lesions, but no clones were detected in the healthy hoof tissues. The clones from the canker lesions examined were grouped into 19 operational taxonomic units, such as treponemal phylotypes originating from papillomatous digital dermatitis lesions of dairy cattle and as-yet uncultured human oral treponemes, indicating the presence of multiple treponemes in the lesions.

著者

Tsuyoshi ITO Kazuyuki UCHIDA Masatoshi NAKAMURA Ko NAKASHIMA Kazuhiko SUZUKI Hiroyuki NAKAYAMA

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.72, no.10, pp.1387-1390, 2010 (Released:2010-10-29)

参考文献数

18

被引用文献数

1 2

---

The paper describes clinical and pathological features of Alexander's disease (AD)-like disorder in a 1 year and 8 months old French bulldog. Clinically, the dog exhibited megaesophagus, emaciation and weakness without any specific neurological symptoms. The dog died of aspiration pneumonia. On the gross observation of formalin-fixed brain, discolored foci were observed in the white matter of the cerebellum and brain stem. Histologically, numerous Rothenthal fibers and hypertrophic astrocytes were distributed especially in the perivascular, subependymal and subpial area of both the cerebrum and cerebellum. The Rosenthal fibers were intensely immunopositive for GFAP and ubiquitin. Demyelination of the white matter was occasionally found in the brain stem. The present case is likely to be categorized in the adult form of AD, though previous AD-like cases in dogs were in the juvenile form.

著者

Mineo HAYASAKI Mikako UENO Hiroyasu EJIMA Akira MUNAKATA Yukio TAMURA

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.12-0206, (Released:2012-10-15)

被引用文献数

1 2

---

A dog was suspected of suffering from ectopic Dirofilaria immitis infection, because a large white nematode worm was detected in the anterior chamber of the left eye. A cylinder-shaped fibrin sac in the anterior chamber was found in the eye of the dog by slit lamp microscopy. After successful surgical removal of the worm, the corneal wound produced by the keratotomy healed in a short period. The worm was estimated to be extremely young, 5th-stage-immature male D. immitis, equivalent to a 90–120-day-old worm postinfection, by close morphological measurement and an experimental infection study. Thus, an immature worm can exhibit erratic parasitism in a host’s eye. The fibrin sac was considered to be a trace of the invasion route, and the cornea may have been the port of entry into the anterior chamber of the eye in the erratic migration of D. immitis.

著者

Hun-Young YOON Dong-Wook SHIN Keum Soon IM Soon-Wuk JEONG

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.12-0285, (Released:2012-10-09)

---

We report here the clinical presentation and successful surgical management of synovial hemangioma accompanied by cruciate ligament injury in a dog. Surgical correction of cruciate ligament injury was performed after removing torn cruciate ligaments, synovial mass and masses attached to the ligaments and distal femoral articular cartilage. At 10 months, the dog has showed no evidence of recurrence in the stifle joint. Synovial hemangioma, although a seemingly rare cause of stifle joint pathology, should be considered in the differential diagnosis for cruciate ligament injury when a circumscribed intra-articular soft tissue mass is evident radiographically with cranial or caudal drawer motion. This is the first case report in a dog to describe synovial hemangioma accompanied by cruciate ligament injury.

著者

Chie YAMAGISHI Yasuyuki MOMOI Tetsuro KOBAYASHI Kaori IDE Koichi OHNO Hajime TSUJIMOTO Toshiroh IWASAKI

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.69, no.9, pp.915-924, 2007 (Released:2007-10-04)

参考文献数

36

被引用文献数

10 27

---

In this study, a retrospective analysis was conducted to assess the current aspects and predisposing factors of canine sterile panniculitis. Miniature dachshund, neutered, and younger dogs appeared to be predisposed. In addition, histories of previous surgery and injection were associated in 46.5% of the cases, with several types of surgical suture materials used. About 88% of the dogs had multifocal lesions, frequently with signs of systemic illnesses. Whereas systemic immunosuppressive therapy was effective in most dogs, surgical excision of lesions was rarely curative. In order to prevent recurrences, over 65% of the cases required prolonged immunosuppressive therapy. Polymorphism of canine α1AT gene was investigated as a candidate gene for sterile panniculitis. Eight polymorphisms were discovered in seven Miniature dachshunds by direct nucleotide sequencing, which included a 12-bp deletion, three non-synonymous single nucleotide polymorphisms, and four silent substitutions. Genotyping of the two polymorphisms, c.109_120del12 and c.483A>C, which identified at high incidence in the dachshunds, was conducted in 83 dogs of 6 popular breeds. The frequencies of neither polymorphism differed between Miniature dachshunds and other breeds, suggesting that neither is responsible for developing panniculitis.

著者

Hiromi HARADA Yasuyuki ENDO Maiko SEKIGUCHI Asuka SETOGUCHI Yasuyuki MOMOI

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.71, no.6, pp.785-787, 2009 (Released:2009-07-04)

参考文献数

11

被引用文献数

3 15

---

A 4-year-old spayed female domestic shorthair cat was presented to us for swelling of all foot pads. The skin lesions were histopathologically diagnosed as suppurative pyogranulomatous panniculitis. The lesions did not respond to cephalexin, prednisolone or itraconazole. However, complete resolution of the skin lesions was obtained with doxycycline. A littermate living in the same household developed similar skin lesions that were also successfully treated with doxycycline. Polymerase chain reaction analysis detected the 16S ribosomal RNA gene of Nocardia spp. in DNA extracted from lesion pus, and direct nucleotide sequencing analysis revealed 100% homology with Nocardia elegans. We diagnosed this case as nocardiosis.

著者

Reeko SATO Saori KOBAYASHI Yuya ABE Hiroaki KAMISHINA Shinichi ODA Jun YASUDA Juso SASAKI

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.74, no.9, pp.1177-1183, 2012 (Released:2012-10-01)

参考文献数

24

被引用文献数

1

---

This study reported detailed clinical effects of bovine lactoferrin on 2 canine littermates (1 female and 1 male) with familial neutrophil dysfunction and an investigation of their genetic background. Clinical signs caused by severe upper respiratory bacterial infections were observed in these dogs. Oral administration of bovine lactoferrin for a long duration improved their clinical signs (severe uveitis in the female dog and coughing from pneumonia in the male dog). Their backcross dogs that have the same father didn’t show clinical signs of bacterial infection. Neutrophil function tests revealed that the backcross dogs didn’t have any disorders. It is likely that abnormal clinical signs are associated with neutrophil dysfunction in the colony, and the mother dog of these cases might be the genetic carrier of this dysfunction.

著者

Kazuya EDAMURA Jonathan N. KING Wolfgang SEEWALD Nobuhiro SAKAKIBARA Masahiro OKUMURA

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.74, no.9, pp.1121-1131, 2012 (Released:2012-10-01)

参考文献数

23

被引用文献数

5 18 10

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The efficacy and tolerability of robenacoxib for the treatment of osteoarthritis in dogs were evaluated in a prospective, multicenter, randomized, noninferiority design clinical trial. A total of 32 dogs presenting with osteoarthritis were allocated randomly to receive, orally once daily for 28 days, either 1–2 mg/kg robenacoxib (n=21) or 3.5–5 mg/kg carprofen (n=11). Dogs were assessed by clinicians and owners using numerical rating scale scores at baseline and days 14 and 28. The primary efficacy endpoint was the global functional disability score, which was the sum of clinician scores for standing posture, lameness at walk, lameness at trot, willingness to raise the contralateral limb and pain at palpation. There was a good to excellent level of efficacy in both treatment groups. Differences between days 14 and 28 compared to day 0 were significant for all 11 clinician and owner scores for robenacoxib, and for 6 of 11 scores for carprofen. The efficacy of robenacoxib was numerically superior to carprofen for all 13 endpoints, but differences were not statistically significant. For the global functional disability score, the estimated efficacy of robenacoxib was 1.244 (95% confidence interval 0.555–2.493) relative to carprofen. The tolerability of both treatments was good as assessed from adverse events, clinical signs, and hematology and serum biochemistry variables. In conclusion, once daily administration of robenacoxib tablets had noninferior efficacy and tolerability compared to carprofen for the treatment of the clinical signs of osteoarthritis in dogs.

著者

Hyun-Ah PARK Ju-Won KIM Hee-Myung PARK

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.74, no.9, pp.1233-1236, 2012 (Released:2012-10-01)

参考文献数

12

被引用文献数

2

---

A 7-year-old intact female Maltese dog was referred with ptyalism and intermittent vomiting but no regurgitation for over 1 month. Survey radiographs including a contrast study revealed a large circular dilated cavity from the carina to the diaphragm. Additionally, multi-detector computed tomography and three-dimensional reconstruction were performed. These images revealed large idiopathic distal esophageal diverticula. This case report represents the first report using multi-detector computed tomography and three-dimensional reconstruction for evaluation of esophageal diverticula in a dog.

著者

Shingo MIYAWAKI Makoto WASHIZU Sadatoshi MAEDA Sanae SHIBATA Kazuhiro WATANABE Kazuaki YAMAZOE

出版者

JAPANESE SOCIETY OF VETERINARY SCIENCE

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.74, no.9, pp.1191-1193, 2012 (Released:2012-10-01)

参考文献数

12

被引用文献数

1

---

Portal vein aneurysm (PVA) is a rare abnormal dilatation of the portal vein, which has not been reported in dogs. We describe the findings of ultrasound and computed tomography in a case of PVA in a young male toy poodle, with the final diagnosis established by explorative surgical observation. The dog had an aneurysmal fusiform dilatation in the extrahepatic portal vein with portal hypertension and multiple portsystemic shunts. This is the first report of canine PVA.

著者

Mariko SAWA Akira YABUKI Noriaki MIYOSHI Kou ARAI Osamu YAMATO

出版者

JAPANESE SOCIETY OF VETERINARY SCIENCE

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.74, no.9, pp.1133-1138, 2012 (Released:2012-10-01)

参考文献数

22

被引用文献数

2

---

The Papanicolaou stain is a gold-standard staining method for tumor diagnosis in human cytology. However, it has not been used routinely in veterinary cytology, because of its complicated multistep procedure and requirement for wet fixation. Currently, a rapid Papanicolaou stain using air-dried smears is utilized in human cytology, but usefulness of this rapid-air-dry Papanicolaou (RAD-Pap) stain in the veterinary field has not been fully evaluated. The purpose of this study was to evaluate the usefulness of the RAD-Pap stain by using quantitative analysis. Air-dried impression smears were collected from tumor specimens and stained with RAD-Pap and Giemsa. Twelve parameters representing the criteria of malignancy were quantitated, and characteristics of the RAD-Pap were evaluated statistically. The RAD-Pap stain could be applied to all the smears, and images of nucleoli and chromatin patterns were clear and detailed. In quantitative analysis with the RAD-Pap stain, but not with the Giemsa stain, dispersion of nucleolus size and dispersion of nucleolus/nucleus ratio in malignant tumors were significantly higher than those in benign tumors. These findings demonstrated that the RAD-Pap stain was useful for obtaining detailed nuclear information, and the ability to differentiate benignity and malignancy by nucleolus findings was a principal advantage of this stain. This RAD-Pap stain could be routinely used as a supportive staining method in veterinary diagnostic cytology.