共查询到20条相似文献，搜索用时 984 毫秒
1.
2.
1病原特点
鸡蛔虫病是由禽蛔科禽蛔属的鸡蛔虫寄生于鸡小肠内引起的常见寄生虫病。鸡蛔虫是鸡体内最大的线虫,呈淡黄白色,头端有3个唇片。雄虫长26～70毫米,尾端向腹面弯曲,有2根近等长的交合刺。雌虫长65～110毫米,尾端尖而直。虫卵呈深灰色,椭圆形, 相似文献
3.
一、对青海省久治县境内灰尾兔的肺脏采得的原圆科线虫进行了研究,与原圆亚科的原圆属和刺尾属的特征均有显著不同,拟定名为不等刺新属(Imparispiculus,gen.nov.),该属模式种为久治不等刺线虫新种(Imparispiculus jiuzhiensis sp.nov.)。二、本新属的特征为虫体细长,角皮无横纹,头端有6个乳突,口周围有3个唇,食道长柱形,后端稍膨大,神经环在食道中部稍前方,颈乳突小,位于食道末端附近,排泄孔在食道膨大部。雄虫交合伞分为2叶,在中后侧肋和两腹肋之间有缺刻,背肋圆形,有一有柄乳突和5个无柄乳突,交合刺不等长,左枝平均长0.483mm,短于0.5mm,右枝长0.943mm,超过0.9mm,两交合刺形状略有不同,右枝比左枝栉状横纹宽,末端透明膜也长,引带由头、体、脚组成,引带脚边缘光滑,副引带由基板、两侧板和两腹板组成,形成弓形。雌虫尾端圆锥形,阴门在肛门前不远处,阴道短,前阴道发达,卵生。 相似文献
4.
5.
类圆线虫病是广西水牛的常见寄生虫病之一,本文作者通过光镜观察,我们确认广西水牛类圆线虫病的病原体即为乳突类圆线虫。本文首次记述该虫种第四期幼虫的形态。在扫描电镜下,虫卵表面光滑,近似椭圆形。丝状蚴头端钝圆,口孔裂隙状,左右为2唇片,每唇片似分3小叶;体表两侧自劲部开始,各有2条纵嵴,延续至尾端,称为双翼膜(double alae),这是该期虫体独有的构造;丝状蚴尾端分叉。自由生活成虫具6片唇,各唇上有1个唇乳突;口孔内沿有一排锥状齿,共9枚;头端两侧各具1个半球形的头感器;头端背腹面的两侧各具1个头乳突,共4个,锥形。自由生活雄虫的泄殖腔处明显地突出于虫体表面,其周围有7对性乳突。自由生活雌虫的阴门横裂,肛门呈半月形。寄生生活雌虫头端截平,4个唇片由口缘伸向口孔,唇片近口孔中央向上翻卷,唇片上各有1个唇乳突;口孔呈倾斜(45°)的马耳他“十”字形;头感器1对,头乳突4个;阴门横裂,阴门部有1对阴侧感觉窝和1对阴后乳突;肛门横裂,突起;尾部自肛门后突然收缩,呈指状。在宿主体内未见到寄生生活雄虫。 相似文献
6.
为了探究寄生于驴消化道的3种圆线科线虫的体表结构及其分子生物学分类，试验对采自我国新疆地区驴(Equus asinus)肠道的槽形盅口线虫(Cyathostomum alveatum)、蒙氏盅口线虫(Cyathostomum montgomeryi)和双冠双冠线虫(Cylicodontophorus bicoronatus)标本使用扫描电镜观察并测量，同时对3种线虫的ITS基因进行PCR扩增，阳性产物测序后进行同源性分析并构建系统发育树。结果表明：槽形盅口线虫外叶冠细长，约为21枚，雄虫交合伞较短，生殖锥背唇有指状附属物，腹唇有乳突状突起，交合刺呈线状，远端有钩；蒙氏盅口线虫外叶冠细长，蜷曲向外，共21枚，雄虫交合伞较长，生殖锥背唇有1对囊状附属物，每个附属物上有1个乳突状凸起，交合刺呈线状，远端有钩；双冠双冠线虫口领与体部相接处只有1个较细的环沟，外叶冠约为30枚，雄虫生殖锥发育良好，腹唇呈圆锥形且有1个丘状突，背唇上有两个对称的刺状附属物，交合刺粗壮。测序得到的ITS基因序列与NCBI中其他双冠双冠线虫ITS基因序列的相似性为99.88%～100%,与盅口亚科其他种类线虫ITS基因... 相似文献
7.
对牛腹腔唇乳突丝虫雌性成虫及其感染蚴扫描电镜观察结果表明,成雌虫头端的口孔、角质围口环、侧唇、背腹唇、亚中乳突和头感器均清晰可见,体表为环行皮纹和纵行皱褶,尾部可见侧附肢、肛孔及尾端刺状突起物,仅极少数成雌虫尾端呈纯圆光滑样,没有突起物.感染蚴的头部基本具备了成虫头部的构造,但发育较原始,其乳交数量较成虫少,尾部可见肛孔、肛唇及一个侧乳突. 相似文献
8.
9.
为了观察3种马肠道寄生线虫的体表结构，试验对采自马消化道内的偏位杯冠线虫(Cylicostephanus asymetricus)、间生杯冠线虫(Cylicostephanus hybridus)和粗壮食道齿线虫(Oesophagodontus robustus)标本(每种线虫选取雄虫、雌虫各3条)进行处理，然后用扫描电镜观察并测量。结果表明：偏位杯冠线虫外叶冠细长而卷曲，共20枚；雄虫生殖锥腹唇呈圆锥形，有乳突状突起，背唇上有成对、长囊状附属物；雌虫尾长为102μm。间生杯冠线虫外叶冠长而尖，共18枚；雄虫生殖锥腹唇皮质领发达，背唇上有1对乳突状突起的附属物；雌虫尾长为90μm。粗壮食道齿线虫外叶冠细长，共22枚；雄虫交合伞有伞前乳突，生殖锥有2对粗指状附属物，长约为50μm;雌虫阴门距尾3 mm左右，肛门距尾尖500μm,尾末端有小突。说明通过扫描电镜观察3种线虫的外部形态特征有明显的差异，可以用扫描电镜对3种线虫进行鉴定。 相似文献
10.
1病原
网尾属线虫呈丝线状,口囊很小,口缘有四个小唇片。交合伞的前侧肋是独立的,中侧肋和后侧肋合二为一,仅末端分开,外背肋是独立的,背肋为两个独立的枝,每枝末端分工2-3个小杈,交合刺等长,暗褐色,短粗,呈靴形,有引器。雌虫阴门位于体中部。 相似文献
11.
H. Jackowiak S. Godynicki K. Skieresz-Szewczyk J. Trzcieli&#;ska-Lorych 《Anatomia, histologia, embryologia》2009,38(5):377-381
This study aims to show the distribution and the three-dimensional structure of the lingual papillae in the arctic fox. The macro- and microscopic structure of the tongue and its lingual papillae was studied in 11 adult arctic foxes. Two types of mechanical papillae were distinguished on the dorsal surface of the tongue – filiform papillae and conical papillae. The gustatory papillae in the arctic fox are represented by fungiform, vallate and foliate papillae. The keratinized filiform papillae on the anterior part of tongue are composed of one big posterior process accompanied by 10–12 secondary anterior processes. The number of anterior processes of filiform papillae undergo a complete reduction within the area between the posterior part of the body of the tongue and area of the vallate papillae. The conical papillae cover the whole dorsal surface of the root of the tongue, including the lateral parts surrounding the area of the vallate papillae and the posterior part of the root. The size of the conical papillae increases towards the root of the tongue but their density decreases. In the arctic fox, there are three pairs of vallate papillae distributed on the plan of a triangle. The diameter of vallate papillae in each successive pair is bigger. The wall surrounding the body of the vallate papilla and its gustatory trench is composed of six to eight conical papillae joined at various degree. The foliate papillae on both margins of the tongue consist of seven to nine laminae. 相似文献
12.
牛肝片吸虫的成虫体表有环行排列的、呈“牛舌状”的棘,其顶部有?数个齿;迷走幼虫体表无体棘,仅有环状排列的、粗细不一的皱纹,其头锥较长,约为虫体的1/2,口腹吸盘是圆形,上有细皱纹和数个乳突。受损职管的大部分功能消失殆尽。而增生小胆管则功能旺盛。浸润的嗜酸粒细胞、淋巴细胞功能较活跃。浸润的细胞中未见巨噬细胞。探讨了虫体与胆管损伤的关系。 相似文献
13.
对18只法比兔生后舌和食管进行组织学观察的结果表明,免出生时舌背侧粘膜上皮未角化,并含有大量丝状乳头（平均高为135.7μm）和少量菌状乳头。固有膜不发达。舌肌为纵向、横向及垂直方向排列的横纹肌。舌腹侧粘膜表面平滑。15日龄以后,舌背侧菌状乳头高为200～521μm,其顶部直径为93～221μm。1日龄时,兔食管粘膜上皮只有4～5层细胞（平均厚28.5μm）。60日龄时,已达30层左右（平均厚164.3μm)。固有膜与粘膜下层分界不清。肌层由内纵、中环、外纵3层组成。肌层随年龄增长而逐渐增厚,1日龄时平均厚度121.4μm,60日龄时平均厚度达750μm。 相似文献
14.
台湾次睾吸虫成虫体被的扫描电镜观察 总被引：4，自引：1，他引：3
台湾次睾吸虫１５日龄成虫经扫描电观察，虫体整个背面和腹面前４／５的体表皮层着生有鱼鳞状的簇生体棘，簇生体棘在虫体前端分布较密集，由前向后渐变稀疏，每一个簇生体棘中含３－６个尖刀形棘。口盘上有１５－１８个无纤毛圆丘型乳突，腹吸盘唇部光滑无乳突分布，但在其周围可见到１０余个花蕾状乳突。 相似文献
15.
Recently a report on the reindeer chromosomes was published (Nes et al. 1965). The chromosome complement was described as consisting of 70 autosomes and a sex chromosome set of the XY-type. All autosomes were acrocentric except one pair which was submetacentric. The X was found to be submetacentric and also the largest chromosome of the complement. The Y was characterized as being the smallest acrocentric chromosome, and the authors stated that the Y chromosome could only occasionally be distinguished from the autosomes by its shorter length.In our studies of the same species we have found a quite different appearance concerning the Y chromosome. 相似文献
16.
17.
Collateral vessel development after chronic bilateral common carotid artery occlusion in the dog 总被引：1，自引：0，他引：1
The functional response to occlusion of arteries supplying the head has been found to be much less severe in th dog than in man, indicating that a more significant collateral development occurs in the dog. To document the anatomic response to chronic occlusion of vessels supplying the head, patterns of collateral vessel growth and development were studied by corrosion casting in adult mongrel dogs 8 weeks after bilateral ligation of the common carotid artery. Dissection of the casts revealed two consistent and bilateral anastomotic connections: (i) internal carotid artery to maxillary artery (anastomotic artery) and (ii) internal carotid artery to ascending pharyngeal artery. Also present in all of the casts was a connection between one common carotid artery and both vertebral arteries, which has been designated as the deep collateral vessel. Significant collateral connections did not occur between the orbital vessels or between analogous vessels of the right and the left sides. 相似文献
18.
Geraldus Gunawan Golda Rani Saragih Yusuf Umardani Srikanth Karnati Hevi Wihadmadyatami Dwi Liliek Kusindarta 《Anatomia, histologia, embryologia》2020,49(2):173-183
This study was carried on the tongues of ten normal, healthy and adult fruit bats (Rousettus amplexicaudatus, also known as the nyap biasa bat) in Yogyakarta, Java Island, Indonesia. The tongue was protrusible, elongated and flat with a rounded apex, and its width and thickness increased gradually towards to lingual root. There were two main types of lingual papillae, mechanical (filiform) and gustatory (fungiform and circumvallate). The tongue was divided into three parts (apex, corpus and radix), and then, each part was subdivided into three regions (two lateral regions and a median region). There were six subtypes of the filiform papillae—three types on the anterior part (small, scale-like and giant), one type on the middle part (leaf-like papillae) and two types on the posterior part (rosette-shaped filiform and conical filiform papillae)—in addition to transitional papillae presented on the corpus and radix. Two types of gustatory papillae were represented by a small number of fungiform papillae that are scattered among the filiform papillae on the lingual apex and corpus, while three circumvallate papillae on the posterior part are arranged in a “V” shape pointing directly at the larynx. 相似文献
19.
观察了5只健康成年母鸡腺胃粘膜上皮及其固有层腺体的亚显微结构。结果,粘膜表面散布许多隆起的乳头,其上皮为单层柱状上皮,上皮细胞顶端呈球状冠,表面布满球形微突;浅层单管腺上皮细胞形态与粘膜上皮细胞相似;深层复管腺的分泌导管开口于乳头顶端。复管腺由许多圆形或多形性小叶组成,每个腺小叶包括1个集合窦和许多围绕集合窦呈辐射状排列的腺小管。腺小管上皮细胞游离端呈椭球状冠。 相似文献
20.
中国地方品种丝羽乌骨鸡白细胞介素2基因的克隆及遗传进化分析 总被引：3，自引：0，他引：3
鸡白细胞介素2（ChIL-2)是近年来新发现的一类细胞因子。根据Sundick等发表的鸡IL-2基因序列设计一对特异性引物,从ConA体外激活的脾脏淋巴细胞中提取mRNA,通过RT-PCR方法扩增和克隆了我国地方品种丝羽乌骨鸡IL-2cDNA,丝羽乌骨鸡IL-2基因由734nt组成,编码-由143个氨基酸组成的前体蛋白,基因5’端含有17个核苷酸和3'端含有285个核苷酸组成的非编码区,3'UTR中含有4个重复的“ATTTA”序列。编码蛋白氨基酸与Kestrel,Obese和SC品系的来杭鸡比较,氨基酸的突变主要发生在28-32位,这一区域丝羽乌骨鸡和Kestrel来杭鸡相同,Obese和SC鸡相同,基因系统进化树分析表明丝羽乌骨鸡和Kestrel来杭鸡具有很近的亲缘关系,Lbese和SC鸡具有很近的亲缘关系。中国的药用鸡品种-丝羽乌骨鸡在非常保守的133位发生了氨基酸突变,我们推测这可能与该品种鸡具有很强的抗病能力有关。 相似文献