菌种和发酵条件对发酵豆粕营养成分的影响

研究利用单一枯草芽孢杆菌、枯草芽孢杆菌和米曲霉混合菌种分别对豆粕进行固态发酵,通过单因素和正交试验对发酵时间、pH、温度、接种量和菌种比例进行优化,比较研究菌种和发酵条件对发酵豆粕营养成分的影响.结果表明:用枯草芽孢杆菌和米曲霉混合菌种发酵豆粕比用单一菌种枯草芽孢杆菌发酵更有利于提高发酵豆粕营养水平,发酵豆粕最优的方案为枯草芽孢杆菌和米曲霉混合菌种比例为2∶1,初始pH为7.5,温度为37℃,发酵时间为48 h.     

两步发酵法降解大豆抗原蛋白的研究

以枯草芽孢杆菌、酵母菌混菌和枯草芽孢杆菌、乳酸菌混菌发酵生豆粕,研究表明,酵母菌及乳酸菌对枯草芽孢杆菌降解抗原蛋白的能力均具有较强的抑制作用。以枯草芽孢杆菌好氧发酵作为前发酵,乳酸菌及酵母菌厌氧发酵作为后发酵对生豆粕进行两步发酵,结果表明:前发酵时间对豆粕中抗原蛋白的降解影响最大,后发酵温度其次,前发酵温度影响最小;当前发酵温度为35℃,前发酵时间为48 h,后发酵温度42℃,后发酵时间32 h,豆粕中两种主要抗原蛋白的残留量仅0.15%。     

豆粕微生物固态发酵工艺优化及其营养物质含量变化北大核心CSCD

本试验以小肽含量为指标,对解淀粉芽孢杆菌单菌固态发酵豆粕以及解淀粉芽孢杆菌、植物乳杆菌和酿酒酵母菌3个菌种混菌固态发酵豆粕的工艺条件进行优化,并对其发酵前后的营养物质含量变化进行研究。通过解淀粉芽孢杆菌、植物乳杆菌和酿酒酵母3个试验菌的生长曲线确定其接种到固态培养基的最佳接种时间。采用单因素试验设计研究解淀粉芽孢杆菌接种量、温度、料水比、发酵时间4个因素对豆粕发酵产小肽的影响,并在此基础上采用四因素三水平的正交试验设计对单、混菌固态发酵豆粕的工艺条件进行优化。对豆粕发酵前后豆粕营养物质含量、大豆球蛋白含量、蛋白质分子质量、发酵产物p H进行测定。结果显示:3株试验菌接在各自种子培养基扩大培养至21 h为其接种到固态培养基的最佳时间。解淀粉芽孢杆菌单菌固态发酵豆粕的最佳工艺条件为:接种量为10%、温度为40℃、料水比为1.0∶1.2、发酵时间为72 h;解淀粉芽孢杆菌、植物乳杆菌、酿酒酵母混菌固态发酵豆粕的最佳工艺条件为:接种量为15%、温度为31℃、料水比为1.0∶1.0发酵时间为120 h,3个菌株的接种比例为:解淀粉芽孢杆菌∶植物乳杆菌∶酿酒酵母=9∶3∶2。经微生物发酵后,发酵产物中小肽、粗蛋白质、粗灰分、粗脂肪含量较发酵前均得到显著提高(P<0.05),粗纤维含量则显著下降(P<0.05);单菌发酵组和混菌发酵组发酵产物中大豆球蛋白含量均较未发酵组显著降低(P<0.05);单菌发酵组和混菌发酵组发酵产物中蛋白质分子质量较未发酵组降低;混菌发酵组发酵产物的p H较未发酵组显著降低(P<0.05),而单菌发酵组发酵产物的p H则与未发酵组差异不显著(P>0.05)。综上所述,豆粕经微生物固态发酵后营养价值在一定程度上得到改善,大分子蛋白质被降解,p H也发生了变化,并且单菌发酵和混菌发酵的效果存在差异。     

豆粕微生物固态发酵工艺优化及其营养物质含量变化

本试验以小肽含量为指标,对解淀粉芽孢杆菌单菌固态发酵豆粕以及解淀粉芽孢杆菌、植物乳杆菌和酿酒酵母菌3个菌种混菌固态发酵豆粕的工艺条件进行优化,并对其发酵前后的营养物质含量变化进行研究。通过解淀粉芽孢杆菌、植物乳杆菌和酿酒酵母3个试验菌的生长曲线确定其接种到固态培养基的最佳接种时间。采用单因素试验设计研究解淀粉芽孢杆菌接种量、温度、料水比、发酵时间4个因素对豆粕发酵产小肽的影响,并在此基础上采用四因素三水平的正交试验设计对单、混菌固态发酵豆粕的工艺条件进行优化。对豆粕发酵前后豆粕营养物质含量、大豆球蛋白含量、蛋白质分子质量、发酵产物p H进行测定。结果显示:3株试验菌接在各自种子培养基扩大培养至21 h为其接种到固态培养基的最佳时间。解淀粉芽孢杆菌单菌固态发酵豆粕的最佳工艺条件为:接种量为10%、温度为40℃、料水比为1.0∶1.2、发酵时间为72 h;解淀粉芽孢杆菌、植物乳杆菌、酿酒酵母混菌固态发酵豆粕的最佳工艺条件为:接种量为15%、温度为31℃、料水比为1.0∶1.0发酵时间为120 h,3个菌株的接种比例为:解淀粉芽孢杆菌∶植物乳杆菌∶酿酒酵母=9∶3∶2。经微生物发酵后,发酵产物中小肽、粗蛋白质、粗灰分、粗脂肪含量较发酵前均得到显著提高(P0.05),粗纤维含量则显著下降(P0.05);单菌发酵组和混菌发酵组发酵产物中大豆球蛋白含量均较未发酵组显著降低(P0.05);单菌发酵组和混菌发酵组发酵产物中蛋白质分子质量较未发酵组降低;混菌发酵组发酵产物的p H较未发酵组显著降低(P0.05),而单菌发酵组发酵产物的p H则与未发酵组差异不显著(P0.05)。综上所述,豆粕经微生物固态发酵后营养价值在一定程度上得到改善,大分子蛋白质被降解,p H也发生了变化,并且单菌发酵和混菌发酵的效果存在差异。     

不同菌种发酵湿豆粕指标对比试验报告

研究不同菌种发酵豆粕发酵指标,可以改进发酵豆粕工艺或选用合适类型的发酵豆粕。笔者分别用乳酸菌、枯草芽孢杆菌、乳酸菌+复合蛋白酶以及枯草芽孢杆菌+复合蛋白酶发酵豆粕,在3个周期内,每组分别测定发酵豆粕的粗蛋白质含量、酸溶蛋白含量、总酸含量、还原糖含量、消化率、胰蛋白酶抑制剂、植酸含量、大豆抗原蛋白含量等指标。结果显示,枯草芽孢杆菌提高粗蛋白含量最优,乳酸菌发酵豆粕产酸量最高,枯草芽孢杆菌和复合蛋白酶制剂提高酸溶蛋白含量作用明显,枯草芽孢杆菌和复合蛋白酶制剂发酵豆粕抗营养因子含量显著降低。     

不同组合菌种固态发酵马铃薯渣对其营养价值影响研究

研究以马铃薯渣为原料,芽孢杆菌、酵母和霉菌为候选发酵菌种,固态发酵马铃薯渣,研究不同菌种组合固态发酵对其营养价值影响。结果表明:在温度为30℃及自然p H的条件下,发酵72 h,15个组合均能够提高马铃薯渣真蛋白和氨基酸含量、降低粗纤维含量和优化氨基酸组成。其中枯草芽孢杆菌+产朊假丝酵母+绿色木霉和枯草芽孢杆菌+扣囊腹膜酵母+黑曲霉组合改善马铃薯渣氨基酸组成效果较好,总氨基酸含量分别提高111.87%、106.34%和107.93%;枯草芽孢杆菌+酿酒酵母+绿色木霉、枯草芽孢杆菌+产朊假丝酵母+霉菌X3、枯草芽孢杆菌+酿酒酵母+霉菌X3及枯草芽孢杆菌+产朊假丝酵母+绿色木霉组合综合增值能力较强,枯草芽孢杆菌+酿酒酵母+绿色木霉增值加权值达到37.09%,明显或显著高于其他组合(P0.05)。     

枯草芽孢杆菌固态发酵豆粕产品质量评定

为了研究枯草芽孢杆菌(Bacillus subtilis)XZ35株固态发酵豆粕的效果,试验以纯化水和市售枯草芽孢杆菌B1株为对照,在最优工艺条件下固态发酵豆粕,对发酵产品进行大豆抗原蛋白残留率、三氯乙酸可溶性氮(TCA-NSI)、粗蛋白、水分和挥发性盐基氮含量测定。结果表明:枯草芽孢杆菌XZ35株发酵豆粕后抗原蛋白残留率为5.9%,显著低于空白对照组和枯草芽孢杆菌B1株对照组(P0.05);TCA-NSI含量为7.24%,显著高于空白对照组和枯草芽孢杆菌B1株对照组(P0.05);枯草芽孢杆菌XZ35株和B1株发酵豆粕后粗蛋白含量显著高于空白对照组(P0.05),各组水分含量差异不显著(P0.05);挥发性盐基氮含量为30.37 mg/100 g,显著低于空白对照组和枯草芽孢杆菌B1株对照组(P0.05)。说明枯草芽孢杆菌XZ35株在豆粕发酵过程中能够将豆粕中大分子蛋白降解为小分子多肽,同时具有较强的抗原蛋白降解能力,进而提高豆粕蛋白质的消化率和利用率,提高豆粕在饲料中的应用范围和使用价值。     

渔用枯草芽孢杆菌发酵工艺优化研究

为了解决渔用枯草芽孢杆菌微生态制剂有效活菌数低、生产成本高的问题,试验以南美白对虾养殖池底分离的一株枯草芽孢杆菌为供试菌,采用单因素和正交试验L9(33)优化渔用枯草芽孢杆菌低廉高产的培养基配方。结果表明:当添加绵白糖6%、鱼粉4%、磷酸氢二钾0. 10%时,可获得最大的菌体生物量,同时研究确定了枯草芽孢杆菌的最佳发酵条件:pH值为7. 0,接种量为6%,培养温度为37℃,转速为200 r/min,发酵时间为32 h。在优化的配方和发酵条件下,枯草芽孢杆菌生物量OD600值(稀释10倍)为0. 658。说明通过优化条件可发酵出高活菌数的渔用枯草芽孢杆菌。     

混菌固态发酵法生产大豆多肽饲料的研究

采用枯草芽孢杆菌、米曲霉和酿酒酵母混合菌株固态发酵法生产大豆多肽饲料。利用枯草芽孢杆菌和米曲霉分泌蛋白酶降解基料中的蛋白质,使其分解成小肽;利用米曲霉将淀粉和纤维素降解为简单糖类物质;利用酿酒酵母分解糖类,产生醇香味,增加多肽饲料的适口性。以高温豆粕为原料,研究了发酵培养基组成、接种菌配比、接种量、发酵温度和发酵时间对发酵豆粕中多肽得率的影响,得到了最佳工艺条件:豆麸比为8:1(m:m),加蜜量为2%,混菌菌种比(枯草芽孢杆菌、米曲霉、酿酒酵母)为5:1:1(V:V:V),加水量为120%,接种量为25%,发酵温度为34℃,发酵时间为96 h。最终发酵物中多肽得率达54.89%,发酵产物中多肽含量为21.47%(干基)。     

枯草芽孢杆菌固态发酵豆粕效果比较

以豆粕为主要原料,通过测定6株枯草芽孢杆菌固态发酵豆粕的粗蛋白、酸溶蛋白含量,并利用SDS-PAGE对发酵豆粕中的大豆抗原蛋白降解情况进行定性分析,比较枯草芽孢杆菌对豆粕的作用效果,筛选出发酵豆粕优势菌株。试验结果显示,与豆粕相比,6株枯草芽孢杆菌固态发酵豆粕48、72、120 h的粗蛋白和酸溶蛋白含量均有所提高,但提高的程度有所差异;菌株Y6发酵豆粕效果优于其他五株枯草芽孢杆菌,发酵120 h的粗蛋白提高了15.7%,酸溶蛋白含量可达9.85%,抗原完全降解。     

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.     

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.     

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.     

A brief history of the prevention of infectious diseases by immunisations

Infectious diseases have always been a terrible scourge for humans. The appearance of these plagues, as they were called without distinction, was generally connected to various conditions: asters, climatic changes or religious reasons. The concept of contagious, and then infectious, diseases came slowly. Variolation, i.e. transmission of ‘virulent’ matter to induce a natural disease and the immunity against it, was brought from Constantinople to England by Lady Montague, in 1721. This ‘variolation’ technique was also often performed in veterinary medicine against diseases like sheep-pox or pleuropneumonia. As ‘vaccination’ is the term generally accepted for ‘immunisation’, variolation can be the word designating such a technique. The second period of the history of immunisation began, in 1880, with the studies of Pasteur and his collaborators. A great number of bacterial vaccines were developed: dead, live but attenuated or only parts of pathogens. The viruses were produced in animals, then in eggs and at last, in tissue cultures. Second generation vaccines appeared with genetic engineering: recombinant vaccines, vector vaccines, nucleic acids vaccines, and markers vaccines, among others. These novel technologies can permit the development of new ones and improve the quality of the vaccines already existing.     

Micronutrient Content of Certain Tropical Conventional and Unconventional Feed Resources of Southern India

The ash, silica and certain important micronutrients were estimated in conventional and unconventional feed and fodder resources available in Southern India. Commonly used dry roughages, such as paddy straw, ragi straw, maize kadbi/stalk, jowar kadbi/stalk, bajra stalk and wheat straw, were high in ash (9.9% +/- 0.77%) and silica (6.4% +/- 0.65%) and low in most of the other micronutrients, except iron, with paddy straw containing most silica (>9%). Cultivated non-leguminous (maize, jowar) and improved green crops (hybrid napier, guinea, green panic, NB-21, CO-1) were also high in ash (10.5% +/- 0.60% and 12.5% +/- 0.51%) but were moderate sources of P, Mg and Cu and good sources of Zn (98 +/- 13.8 ppm and 55 +/- 6.7 ppm). Leguminous green fodders (stylosanthus, lucerne, cow pea, soyabean) were excellent sources of Ca (1.9% +/- 0.16%), Mg (0.40% +/- 0.05%), Cu (30 +/- 5.2 ppm), Zn (121 +/- 14.7 ppm) and Fe (1234 +/- 166 ppm) and moderate sources of P. Mixed local grasses and weeds were high in silica (6.9% +/- 1.00%) but were good sources of Cu, Zn and Fe. Cereal grains (maize, wheat, rice, ragi) were low in ash (2.9% +/- 0.33%) and were relatively poor sources of Ca (0.22% +/- 0.03%), Mg (0.19% +/- 0.03%) and Cu (13 +/- 3.1 ppm). Pulses were low to medium sources of most minerals and good sources of Fe (1230 +/- 293 ppm). Oil seed cake/extractions (groundnut cake, cotton seed cake, soyabean meal, sunflower cake, safflower cake) and cereal by-products (rice polish, rice bran, wheat bran) were excellent sources of P (1.1% +/- 0.47% and 2.3% +/- 0.19%) and good sources of Zn (65 +/- 3.9 ppm and 66 +/- 10.7 ppm) and Fe (938 +/- 130 ppm and 662 +/- 126 ppm). Among the unconventional feeds screened, orange peel, sunflower heads, meat meal, rubber seed cake, spirulina algae and sea weeds contained plentiful Ca, Zn and Fe: tree leaves/top feeds (mulberry, erythrina, glyricidia, banana, subabul, groundnut haulms) were excellent sources of Ca (1.5% +/- 0.13%), Zn (120 +/- 22.9 ppm) and Fe (1033 +/- 133 ppm) but relatively poor sources of P. Soyabean husk, cocoa seed husk, rubber seed cake and meat meal were moderate to good sources of P (1.0% and 0.33%). The high Zn and Fe values of most feeds/fodders were probably due to soil contamination. This account of the micronutrient content of feed/fodder resources should help in strategic supplementation intended to alleviate local deficiencies.     

Bovine Mastitis in Selected Areas of Southern Ethiopia

A study on bovine mastitis, designed to determine the causal agents, prevalence of infection and impact of risk factors in three cattle breeds, was conducted in selected areas of southern Ethiopia. A total of 307 lactating and non-lactating cows, of which 162 were indigenous Zebu, 85 Jersey and 60 Holstein-Friesian, were examined by clinical examination and the California mastitis (CMT) test. Of these, 40.4% were positive by CMT and bacteriology for clinical or subclinical mastitis, with prevalence rates of 37.1% and 62.9%, respectively. Out of 1133 quarters examined, 212 (18.7%) were found to be infected, 83 (39.2%) clinically and 129 (60.8%) subclinically. The prevalence of mastitis was significantly higher in Holstein-Friesian than in indigenous Zebu, in non-lactating cows than in lactating cows, in the early lactation stage than in the mid-lactation stage, in cows with lesions and/or tick infestation on skin of udder and/or teats than in cows without this factor, and in the wet season than in the dry season. Mastitis increased with parity number (R = 0.9). Of 248 CMT and clinically positive udder quarter samples analysed microbiologically, 212 were culturally positive for known mastitis pathogens and 36 were negative. Of the 199 positive samples, Staphylococcus accounted for 39.2%, Streptococcus for 23.6%, coliforms for 14.1%, Micrococcus and Bacillus species for 8.0% each and Actinomyces or Arcanobacterium (Corynebacterium) for 7.0%. It was concluded that there was a high prevalence of clinical and subclinical mastitis, mainly caused by Staphylococcus aureus, Streptococcus agalactiae and Escherichia coli, in this study area.     

不同日粮氮水平对山羊氮代谢和微生物蛋白质合成的影响

本试验旨在探讨不同日粮氮水平对内蒙古白绒山羊氮代谢和微生物蛋白质合成(MCP)的影响,以达到提高氮利用率,减少环境污染和饲料资源的浪费。试验选用9只体况良好、体重为(43.83±2.95)kg,装有瘤胃瘘管的内蒙古白绒山羊,按体重随机分为3组,每组3只。日粮分为低氮7.5%、中氮10.5%、高氮13.5%3个氮水平。试验使用常规试验方法分析测定粪尿血液等生化指标,通过全收尿法和尿嘌呤衍生物法估测MCP。结果表明:随着氮水平增加,氨氮(NH3-N)浓度、氮摄入量、尿氮排出、尿中尿素氮(UUN)和MCP显著增加(P0.05),干物质采食量(DMI)显著降低(P0.01);沉积氮占总摄入氮的比例在中氮组最高,MCP在高氮组最高。综上所述,适当降低日粮氮水平可减少粪尿氮排放,提高反刍动物氮利用率。     

Microsporidial keratopathy in two dogs

A microsporidial keratopathy is described in two dogs. Both dogs presented with a unilateral stromal keratopathy characterized by multifocal coalescing opacities, and the diagnosis was made on histopathologic examination of keratectomy specimens. Transmission electron microscopy (TEM) on formalin‐fixed, paraffin‐embedded corneal tissue was performed in one dog, and the morphologic features were consistent with Nosema species infection. Both dogs were initially diagnosed and treated by superficial keratectomy. One dog received additional antifungal medication and underwent a penetrating keratoplasty following local recurrence two years later. No other systemic lesions attributable to the microsporidial infection were identified clinically. The clinical and diagnostic pathology findings, treatment, and follow‐up are discussed.