ABSTRACT
In a rodent (Rattus norvegicus) survey in Buenos Aires province, metacestodes of tapeworms were found encysted in the liver of the host. The aim of this work was the morphological and molecular identification of this parasite. To achieve the molecular characterization of the parasite, ribosomal (28S) and mitochondrial (COI) DNA were amplified and sequenced. Based on both morphological and molecular data using bioinformatic tools, the metacestode was identified as Cysticercus fasciolaris. The adult form of this tapeworm (Taenia taeniaeformis) commonly infects felid and canid mammalian hosts. This is the first report on the molecular identification of Cysticercus fasciolaris in Buenos Aires province (Argentina).
Subject(s)
Cysticercus/anatomy & histology , Cysticercus/genetics , Rats/parasitology , Animals , Argentina , Cysticercus/classification , Cysticercus/isolation & purificationABSTRACT
Bovine hearts naturally infected with Cysticercus bovis were collected from cattle slaughtered in Assiut abattoir. The morphology of cysticerci was studied in series of histological sections, which were stained with hematoxylin-eosin. The bladder wall has external hair-like processes in contact with the host tissue, which have an absorptive function. This wall represents a proliferative area giving rise to a wavy spiral canal; at its end the invaginated scolex and suckers are located. The tissue reaction was more marked at the site facing the opening of the spiral canal on the surface of the bladder. The reaction of the heart to C bovis was inflammatory in nature, leading to the formation of a wide inflammatory rim with infiltrating cellular elements. The cardiac muscles revealed granulomatous lesions with a large area of inflammatory reactions in which the cardiac muscle was destroyed. Cysticercosis must be taken into consideration in differential diagnosis of inflammatory cardiac diseases
Subject(s)
Animals , Cysticercus/anatomy & histology , Heart/pathology , Histology , Diagnosis, Differential , Cattle DiseasesABSTRACT
In the present study, we have determined the growth and development pattern of rostellar hooklets of Taenia solium cysticerci (Zhengzhou and Harbin strains) in three pigs (1 SEM and 2 L-SEM strains) 89-196 days post experimental infection. A total of 3,675 cysticerci were collected from 3 pigs, 3,007 (82%) of 3,675 cysticerci were evaginated by enzyme method. 439 (15%) evaginated cysticerci were carefully examined and measured after dehydration, staining, and mounting on microscopic slides. Among 439 cysticerci, 234 (53%) had pair rostellar hooks, 88 (20%) with unpair hooks, 60 (14%) only small (outer row) hooks, and 57 (13%) no hooks including 34 hooks were completely dropped and 23 no hooks developed. The number ranged from 10 to 17 pairs for pair hooks and 1 to 29 for unpair ones. The length and width of rostallar hooks on the scolex of cysticerci were usually larger in the pig with longer infection time. Moreover, cysticerci with pair and unpair rostellar hooks had only small hooks and no hooks were present on their scolices. However, cysticerci with only large (inner row) hooks were not found. These findings indicate that the growth and development of small hooks precedes that of the large hooks in the formation of the two-row pattern rostellar hook in Cysticercus cellulosae.
Subject(s)
Animals , Cysticercosis/parasitology , Cysticercus/anatomy & histology , Swine , TaiwanABSTRACT
A retrospective analysis of fine needle aspirates of 132 cases of cysticercosis presenting as palpable nodule is presented. In 98 cases, larval parts, detached hooklets and scolex established the diagnosis; in another 24 cases, the background inflammatory pattern was helpful in suggesting the diagnosis of a parasitic lesion.
Subject(s)
Adolescent , Adult , Animals , Biopsy, Needle , Child , Child, Preschool , Cysticercosis/diagnosis , Cysticercus/anatomy & histology , Humans , Infant , Middle Aged , Retrospective StudiesABSTRACT
A retrospective analysis of fine needle aspirates of 132 cases of cysticercosis presenting as palpable nodule is presented. In 98 cases, larval parts, detached hooklets and scolex established the diagnosis; in another 34 cases, the background inflammatory pattern was helpful in suggesting the diagnosis of a parastic lesion.
Subject(s)
Adolescent , Adult , Animals , Biopsy, Needle , Child , Child, Preschool , Cysticercosis/parasitology , Cysticercus/anatomy & histology , Humans , Infant , Middle Aged , Retrospective StudiesSubject(s)
Humans , Central Nervous System/parasitology , Cysticercosis , Arteritis/parasitology , Cysticercosis/complications , Cysticercosis/diagnosis , Cysticercosis/therapy , Cysticercus/anatomy & histology , Cysticercus/pathogenicity , Diagnostic Imaging/methods , Epilepsy/parasitology , Taeniasis , Taenia/pathogenicityABSTRACT
La finalidad de este estudio fue demostrar que el cisticerco racemoso (CR) es, como el celulosos (CC), larva (metacestodo) de T. solium, hecho que se ha puesto en duda. CR sólo parasita el cerebro del hombre, en donde causa las formas más graves de cisticercosis cerebral. Para lograr este propósito se buscaron restos del escólex y los ganchos del rostelo en dos CR y en cuatro cisticercos de forma intermedia (CFI) que se extrajeron quirúrgicamente de los ventrículos cerebrales. Los CFI son parásitos que comparten características morfológicas y con CC y CR, ya que poseen gran desarrollo de la membrana pero conservan estructuras que aparentemente corresponden al escólex. Se hicieron corte histológicos seriados y observaciones con microscopios estereoscópico y electrónico de barrido. En CR fue posible localizar la corona de ganchos, y en los CFI las estructuras del escólex: conducto espiral, ventosas y ganchos. Se concluye que CC, CR y CFI son formas larvarias de T. solium