2015—2019年湖南省5个原种猪场主要繁殖障碍性疫病监测

为了解湖南省原种猪场主要繁殖障碍性疾病的流行情况及免疫抗体水平,2015—2019年对5个原种猪场,采集血清及对应扁桃体样品各1 000份进行主要繁殖障碍性疾病检测,其中对扁桃体样品进行猪瘟病毒（CSFV）、猪繁殖与呼吸综合征病毒（PRRSV）、高致病性猪繁殖与呼吸综合征病毒（HP-PRRSV）、伪狂犬病病毒（PRV）、圆环病毒2型（PCV2）、猪细小病毒（PPV）病原检测,对血清样品进行CSFV、PRRSV、PRV-gB免疫抗体检测。结果显示：CSFV、PRRSV、HP-PRRSV、PRV、PCV2和PPV病原阳性率分别为0、2.1%、1.3%、9.5%、22.1%、28.9%;部分场PRV感染抗体（gE）反复出现转阳,多数猪场PCV2和PPV感染较严重;CSFV、PRRSV、PRV-gB免疫抗体合格率分别为96.9%、99.7%、98.7%,均超过了国家规定的70%的最低标准。结果表明,这5个原种猪场的CSFV、PRRSV、PRV抗体保护水平良好,且猪瘟基本达到了免疫无疫状态,但部分原种猪场仍存在不同程度的PRRSV、HP-PRRSV、PRV、PCV2、PPV感染,其中PCV2与PPV感染较为严重,需通过免疫、监测、生物安全控制等综合措施,加强控制与净化。     

种公猪精液中与繁殖障碍有关的6种病毒的检测

采用PCR和RT-PCR技术,于2006年4月～10月对上海及其周边地区的30个猪场和人工授精站的生产公猪精液样品355份进行了猪繁殖与呼吸综合征病毒(PRRSV)、猪伪狂犬病病毒(PRV)、猪细小病毒(PPV)、猪圆环病毒(PCV)、猪瘟病毒(CSFV)和日本脑炎病毒(JEV)等6种与猪繁殖障碍有关的病毒的检测,结果表明,日本脑炎病毒检测为阴性,检出PRRSV、PRV、CSFV、PPV和PCV阳性数和阳性率分别为6份(1.69%)、9份(2.54%)、5份(1.41%)、75份(21.1%)、6份(1.69%),有一个猪场的5份样品存在PRV和PPV混合感染.     

云南省部分地区种公猪精液携带繁殖障碍性病毒调查研究

为了解云南省部分地区规模化猪场种公猪精液繁殖障碍病毒性病原的感染状况,应用PCR对2014年—2016年间云南省部分地区规模化猪场212份种公猪精液进行了猪繁殖与呼吸综合征病毒(PRRSV)、猪瘟病毒(CSFV)、猪伪狂犬病病毒(PRV)、猪圆环病毒2型(PCV2)和猪细小病毒(PPV)5种与猪繁殖障碍有关的病原检测。结果表明,PPRSV阳性率为7.08%,CSFV阳性率为3.77%,PCV2阳性率为6.60%,PRV阳性率为3.30%,没有检测出PPV,PRRSV和PCV2的感染率呈上升趋势,其他疫病保持相对平稳态势。所有的混合感染样品中,均检测出了PRRSV,其中PRRSV和PCV2的混合感染最为常见。结果提示,控制猪场疫病发生的关键是控制PRRSV和PCV2的流行,有必要加强对种猪群的疫病病毒检测,推行种猪场主要疫病的控制与净化工作。     

黑龙江某猪场主要疫病的血清学调查与免疫效果分析

为了解黑龙江某小型猪场的猪传染病流行情况，分别对其备母猪群、仔猪群、经产母猪群进行了猪伪狂犬病病毒（PRV）、猪瘟病毒（CSFV）、猪繁殖障碍与呼吸综合征病毒（PRRSV）的抗体水平进行检测。检测结果为，PRVgB抗体阳性率为100．00％，抗体水平较高；CSFV抗体阳性率为86．67％；PRRSV抗体阳性率为70．00％，抗体水平不高，表明PR_RS在该场或有流行。     

广西某猪场7种主要病毒性疫病的抗体检测与分析

为了解广西某猪场猪瘟（CSF）、口蹄疫（FMD）、猪伪狂犬病（PR）、猪繁殖与呼吸综合征（PRRS）、猪圆环病毒相关疾病（PCVAD）、猪细小病毒病（PPI）及猪乙型脑炎（JE）7种主要病毒性疫病的抗体水平及感染情况,本研究采集155份商品猪和种猪的血清,利用阻断ELISA和间接ELISA方法进行抗体水平检测。结果显示：猪群猪瘟病毒（CSFV）、O型口蹄疫病毒（FMDV-O）、猪伪狂犬病病毒gB蛋白（PRV-gB）、猪伪狂犬病病毒gE蛋白（PRV-gE）、猪繁殖与呼吸综合征病毒（PRRSV）、猪圆环病毒2型（PCV2）、猪细小病毒（PPV）、日本乙型脑炎病毒（JEV）的平均抗体阳性率分别为90.3%、81.3%、96.8%、0%、52.3%、76.1%、84.5%、69.7%,表明该猪场CSFV、FMDV-O、PRV、PCV2、PPV免疫效果较好,达到了农业农村部规定的标准（70%）;PRV-gE抗体阳性个体总数为0,表明无伪狂犬野毒感染。从各阶段猪群的抗体阳性率分析,商品猪存在PRRSV、PPV、JEV野毒感染,其中PPV野毒感染较为严重,提示该猪场应加强商品猪PRRSV、PPV和J...     

猪全血中多种病原流行病学监测的初步研究

本文利用PCR或RT-PCR技术连续两年对规模猪场采集的猪全血分别进行猪瘟病毒（CSFV）、猪繁殖障碍综合征病毒（PRRSV）、猪伪狂犬病病毒（PRV）、猪圆环病毒2型（PCV2）、牛病毒性腹泻病毒（BVDV）和日本乙型脑炎病毒（JEV）的检测,结果发现2008年猪全血中CSFV、PRRSV、PRV、PCV2的感染率为30.0%、50.0%、4.0%和30.0%,2009年猪全血中CSFV、PRRSV、PRV、PCV2、BVDV和JEV的感染率分别为19.8%、13.7%、1.1%、31.9%、0.7%和2.7%,这表明用猪的全血可进行猪瘟等6种疫病的监测和流行,为更深入研究疫病的流行病学奠定了基础。     

云南红河州猪繁殖障碍综合征病因研究

针对红河州猪繁殖障碍综合征危害日趋严重的现象,进行了该病的流行病学、病原学、人工感染及免疫试验。结果表明,种公猪发病率为23.77%、妊娠母猪发病率为41.38%,仔猪死亡率为19.94%、流产率11.19%、死胎率47.96%、弱仔率31.78%;血清学调查阳性检出率分别为猪瘟(CSF)1.1%、细小病毒(PPV)43.97%、鹦鹉热衣原体(CP)36.98%、伪狂犬病毒(PRV)24.6%、乙型脑炎(JEV)20.9%、弓形虫(Tg)14.66%、蓝耳病病毒(PRRSV)11.5%、猪圆环病毒(PCV)7.2%、布鲁氏菌(Br)2.44%。其中单一感染占39.6%,混合感染占35.6%。从死亡新生仔猪和流产胎儿的脑及内脏中分离获得PPV、PRV、CP各2株病原,经细胞传代,鸡胚传代,毒价测定、形态观察、动物感染试验和应用PCR技术等鉴定,确证为伪狂犬、细小病毒病、衣原体三种。应用猪伪狂犬、细小病毒病、衣原体三种疫苗免疫注射,使本地区猪群的受胎率由92.7%提高到99.5%,妊娠母猪发病率从31.43%下降到0.77%,初生乳猪发病死亡率从24.9%下降到0.27%。调查研究表明,近年来引起红河州地区猪繁殖障碍综合征广泛流行的主要病因是PPV、PRV、CP三种病原单一或混合感染所致,而且动物感染试验证实是PPV、PRV、CP是造成猪繁殖障碍病的主要病原。     

2014-2018年广西6种猪主要病毒性繁殖障碍疫病流行病学调查

试验旨在了解广西猪主要病毒性繁殖障碍疫病的发生态势,为预防和控制此类疫病提供科学依据。采用RT-PCR/PCR方法对2014年3月至2018年2月采自广西的349份流产胎儿样品进行猪瘟病毒(CSFV)、猪繁殖与呼吸综合征病毒(PRRSV)、猪圆环病毒2型(PCV2)、猪伪狂犬病病毒(PRV)、猪细小病毒(PPV)及猪乙型脑炎病毒(JEV)6种主要病毒性繁殖障碍疫病病原的检测并分析其阳性检出率在不同年份、季节之间的差异及病原混合感染情况。结果显示,2014-2017年,6种病原的猪场阳性率从高到低依次为JEV(36.00%)、PRRSV(16.00%)、PCV2(9.00%)、PRV(7.00%)、PPV(6.00%)和CFSV(5.00%),样品阳性检出率从高到低依次为JEV(27.06%)、PRRSV(6.18%)、PRV(5.88%)、PCV2(3.82%)、CSFV(2.35%)和PPV(2.35%)。季节因素对6种病毒性繁殖障碍疫病的发生有一定影响:JEV在夏季、秋季检出率较高,春季、冬季检出率较低;PRRSV一年四季检出率均较高,且无明显差异;PCV2在春季检出率较高,其次是夏季和冬季,秋季检出率较低;PRV在春季、冬季检出率较高,夏季、秋季检出率均为0;PPV在夏季检出率较高,其次是春季和秋季,冬季检出率为0;CSFV在冬季检出率最高,其次是夏季,春季和秋季检出率均为0。流产胎儿以单一感染为主,6种病毒均存在不同程度单一感染情况,单一感染率JEV最高(23.82%)、PCV2最低(0.59%);混合感染以双重感染为主,其中以2016年双重感染情况较多,且感染组合多样;三重感染情况较少、仅在2016年送检样品中发现1例,未发现四重及四重以上感染情况。调查结果表明,2014-2017年,JEV均有较高的阳性检出率,已成为广西部分猪场母猪流产最主要病毒性病原。PRRSV和PRV仍是目前引起广西猪场母猪流产的主要病毒性病原。     

贵州省规模化养猪场繁殖障碍性疾病的血清学调查

采用间接酶联免疫吸附试验(ELISA)和乳胶凝集试验(LAT),对贵州省4个地区6个规模化猪场240份血清进行猪瘟病毒(CSFV)、猪细小病毒(PPV)、猪伪狂犬病毒(PRV)、猪繁殖障碍与呼吸综合征病毒(PRRSV)及猪圆环病毒2型(PCV2)抗体水平检测。结果:CS-FV、PPV和PRV免疫抗体阳性率分别为64.2%、77.9%和59.2%;PRRSV、PCV2抗体阳性率分别为10.4%和32.5%。上述结果表明,猪细小病毒病、猪伪狂犬病和猪瘟免疫效果比较理想,但6个规模场存在PRRSV和PCV2混合感染,应引起各养殖场高度重视。     

2010年上半年11省市规模猪场疫病监测与剖析

为了解近期发病猪场几种病毒性疫病的流行状况,采用RT-PCR和PCR方法,对2010年1月至6月期间,来自11省(市) 50个猪场共147份病料进行猪瘟病毒（CSFV）、猪繁殖与呼吸综合征病毒（PRRSV）、高致病性猪繁殖与呼吸综合征病毒（HP-PRRSV）、伪狂犬病毒（PRV）和猪圆环病毒2型（PCV2）检测,并采用ELISA方法对其中26个猪场458份血清样品进行伪狂犬gE野毒抗体检测。结果表明,PCV2阳性率最高,为75.3%（70/93）;PRRSV阳性率次之,为57.4%（78/136）,HP-PRRSV阳性率为43.5%（54/124）;CSFV和PRV的阳性率分别为37.7%（52/138）和21.0%（21/100）;伪狂犬gE野毒抗体阳性率为16.4%（75/458）。同时检出2种及2种以上病毒的样品占46.9%（69/147）,其中以HP-PRRSV+PCV2、CSFV+PCV2及CSFV+HP-PRRSV+PCV2三种形式最为常见。PRRSV（50.0%）是猪场繁殖障碍性疾病中的最常见病原;CSFV（56.0%）和PCV2（48.0%）是断奶前后仔猪腹泻的常见病原;HP-PRRSV（53.5%）、CSFV（50.7%）和PCV2（48.0%）是保育猪发生高热症的常见病原。该检测结果为猪场疫病的诊断与防控提供了参考。     

白术、微米白术和白术多糖对断奶仔猪生长性能和肠道形态及微生态区系的影响

试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。     

Prevalence and seasonal incidence of nematode parasites and fluke infections of sheep and goats in eastern Ethiopia

Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal (GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April 2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes. But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia.     

Phase I evaluation of CCNU (lomustine) in tumor-bearing cats

1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks.     

Prevalence of gastric lesions in racing Alaskan sled dogs

Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large.     

Furosemide continuous rate infusion in the horse: evaluation of enhanced efficacy and reduced side effects

Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses.     

Y‐chromosomal variation of local goat breeds of Turkey close to the domestication centre

Genetic variations in chromosome Y are enabling researchers to identify paternal lineages, which are informative for introgressions and migrations. In this study, the male‐specific region markers, sex‐determining region‐Y (SRY), amelogenin (AMELY) and zinc finger (ZFY) were analysed in seven Turkish native goat breeds, Angora, Kilis, Hair, Honaml?, Norduz, Gürcü and Abaza. A SNP in the ZFY gene defined a new haplotype Y2C. All domestic haplogroups originate from Capra aegagrus, while the finding of Y1A, Y1B, Y2A and Y2C in 32, 4, 126 and 2 Turkish domestic goats, respectively, appears to indicate a predomestic origin of the major haplotypes. The occurrence of four haplotypes in the Hair goat and, in contrast, a frequency of 96% of Y1A in the Kilis breed illustrate that Y‐chromosomal variants have a more breed‐dependent distribution than mitochondrial or autosomal DNA. This probably reflects male founder effects, but a role in adaptation cannot be excluded.     

The Epidemiology of Gastrointestinal Nematodes of Dairy Cattle in Central Kenya

The epidemiology of H. placei and of other gastrointestinal nematodes in yearling dairy cattle was examined on two farms in Kiambu District, central Kenya during each of 13 one-month periods from April 1993 to April 1994. On each farm, 32 newly weaned dairy calves were given a single dose of albendazole and then placed on experimental pastures. Twelve of the animals were designated for bi-monthly slaughter (n = 2) and analysis of worm population characteristics and 20 were designated for blood and faecal collection and for weighing. Two parasite-free tracer calves were grazed alongside the weaner calves each month throughout the study period and were also slaughtered for analysis of worm populations. Faecal egg counts, haematological and serum pepsinogen determinations, herbage larval counts, and animal live weight changes were recorded monthly. The study revealed that Haemonchus placei, Trichostrongylus axei, Cooperia spp. and Oesophagostomum radiatum were responsible for parasitic gastroenteritis and that H. placei was the predominant nematode present in the young cattle on both farms. Faecal egg counts from resident cattle and necropsy worm counts revealed that pasture larval levels were directly related to the amount of rainfall. The total worm burdens in the animals were highest during the rainy season (March–June and October–December) and lowest during the dry seasons (July–September and January–February). The very low recovery of immature larvae of H. placei from the tracer calves indicated that arrested development is not a feature of the life cycle of this parasite in central Kenya. The maintenance of the parasite population depended on continuous cycling of infection between the host and the pasture. The agroclimatic conditions of the study area were such that, in general, favourable weather conditions for the development and survival of the free-living stages of gastrointestinal nematodes existed all year round.     

Diversity of Ectoparasites in Sheep Flocks in Sa~o Paulo,Brazil

The occurrence of ectoparasites in sheep flocks is frequently reported but seldom quantified. Sheep production used to be a predominantly family activity in the state of Sa~o Paulo (Brazil), but it began to become a commercial activity in the past decade. Thus, information about the ectoparasites existing in sheep flocks has become necessary. The present data were obtained by means of questionnaires sent to all sheep breeders belonging to the `Associaça~o Paulista de Criadores de Ovinos' (ASPACO; Sa~o Paulo State Association of Sheep Breeders). Response reliability was tested by means of random visits paid to 10.6% of the respondents. Most of the properties (89.5%) reported the presence of one or more ectoparasites. Screw-worm (Cochliomyia hominivorax) was the most frequent ectoparasite (72.5%), followed by bot fly larvae (Dermatobia hominis, 45.0%), ticks (Amblyomma cajennense) and Boophilus microplus, 31.3%) and finally lice (Damalinia ovis, 13.8%). Combined infestations also occurred, the most common one being screw-worm with bot fly larvae (36.0%) followed by bot fly larvae with ticks (13.9%), screw-worm with ticks (9.3%), bot fly larvae with lice (6.9%), and ticks with lice (5.0%). The most common triple combination was screw-worm, bot fly larvae and ticks (12.8%). Breeds raised for meat or wool were attacked by bot fly larvae and ticks more often than other breeds. Lice were only absent from animals of indigenous breeds. The relationships among these ectoparasites are discussed in terms of sheep breeds, flock size, seasonality and the ectoparasitic combinations on the host.     

Feline intracranial neoplasia: retrospective review of 160 cases (1985-2001)

The purpose of this study was to determine the frequency of different tumor types within a large cohort of cats with intracranial neoplasia and to attempt to correlate signalment, tumor size and location, and survival time for each tumor. Medical records of 160 cats with confirmed intracranial neoplasia evaluated between 1985 and 2001 were reviewed. Parameters evaluated included age, sex, breed, FeLV/FIV status, clinical signs, duration of signs, number of tumors, tumor location(s), imaging results, treatment, survival times, and histopathologic diagnosis. Most of the cats were older (11.3 +/- 3.8 years). Primary tumors accounted for 70.6% of cases. Metastasis and direct extension of secondary tumors accounted for only 5.6 and 3.8% of cases, respectively. Twelve cats (7.5%) had 2 or more discrete tumors of the same type, whereas 16 cats (10.0%) had 2 different types of intracranial tumors. The most common tumor types were meningioma (n = 93, 58.1%), lymphoma (n = 23, 14.4%), pituitary tumors (n = 14, 8.8%), and gliomas (n = 12, 7.5%). The most common neurological signs were altered consciousness (n = 42, 26.2%), circling (n = 36, 22.5%), and seizures (n = 36, 22.5%). Cats without specific neurological signs were common (n = 34, 21.2%). The tumor was considered an incidental finding in 30 (18.8%) cats. In addition to expected relationships (eg, meninges and meningioma, pituitary and pituitary tumors), we found that lesion location was predictive of tumor type with diffuse cerebral or brainstem involvement predictive of lymphoma and third ventricle involvement predictive of meningioma.