東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Life cycles and systematics of Mesoc...

Padgett, Kerry A.

Linked to FindBook

Google Book

Amazon

博客來

Life cycles and systematics of Mesocestoides spp. tapeworms.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Life cycles and systematics of Mesocestoides spp. tapeworms./
Author:	Padgett, Kerry A.
Description:	101 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-06, Section: B, page: 2748.
Contained By:	Dissertation Abstracts International65-06B.
Subject:	Biology, Ecology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3137585
ISBN:	0496847597

Life cycles and systematics of Mesocestoides spp. tapeworms.
Padgett, Kerry A.

Life cycles and systematics of Mesocestoides spp. tapeworms. - 101 p.

Source: Dissertation Abstracts International, Volume: 65-06, Section: B, page: 2748.

Thesis (Ph.D.)--University of California, Davis, 2004.

This dissertation focuses on the life cycles and systematics of 3 molecular strains of Mesocestoides tapeworms that represent different evolutionary lineages (clades A, B, and C) found in Californian domestic carnivores and wildlife. In Chapter 1, life cycles of Mesocestoides clades A and B were investigated by identifying sylvatic hosts and by conducting experimental feeding trials with immature tapeworm stages (proglottids, tetrathyridia, and acephalic metacestodes). Tetrathyridia (clades A and B) were found in deer mice (Peromyscus maniculatus), and adult tapeworms were found in island fox (Urocyon littoralis; clade A) and coyotes (Canis latrans; clades A and B), at 2 sites in California. In experimental-feeding trials, tetrathyridia ingested by lizards, mice, and dogs resulted in tetrathyridial (lizards and mice) or adult infections (dogs); proglottids and acephalic metacestodes were not infectious to vertebrates. These results support investigating arthropods as a first host of Mesocestoides spp.

ISBN: 0496847597Subjects--Topical Terms:

1017726
Biology, Ecology.

Life cycles and systematics of Mesocestoides spp. tapeworms.
LDR:03313nmm 2200301 4500 001 1852049
005 20051229075126.5
008 130614s2004 eng d
020 $a 0496847597
035 $a (UnM)AAI3137585
035 $a AAI3137585
040 $a UnM $c UnM
100 1 $a Padgett, Kerry A. $3 1939925
245 1 0 $a Life cycles and systematics of Mesocestoides spp. tapeworms.
300 $a 101 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-06, Section: B, page: 2748.
500 $a Adviser: Walter M. Boyce.
502 $a Thesis (Ph.D.)--University of California, Davis, 2004.
520 $a This dissertation focuses on the life cycles and systematics of 3 molecular strains of Mesocestoides tapeworms that represent different evolutionary lineages (clades A, B, and C) found in Californian domestic carnivores and wildlife. In Chapter 1, life cycles of Mesocestoides clades A and B were investigated by identifying sylvatic hosts and by conducting experimental feeding trials with immature tapeworm stages (proglottids, tetrathyridia, and acephalic metacestodes). Tetrathyridia (clades A and B) were found in deer mice (Peromyscus maniculatus), and adult tapeworms were found in island fox (Urocyon littoralis; clade A) and coyotes (Canis latrans; clades A and B), at 2 sites in California. In experimental-feeding trials, tetrathyridia ingested by lizards, mice, and dogs resulted in tetrathyridial (lizards and mice) or adult infections (dogs); proglottids and acephalic metacestodes were not infectious to vertebrates. These results support investigating arthropods as a first host of Mesocestoides spp.
520 $a In Chapter 2, ants were examined as possible first intermediate hosts of Mesocestoides tapeworms. A PCR-based diagnostic assay was developed to test pooled samples of ants. Between 2--3% of ants ( Lasius niger and Tapinoma sessile) from an enzootic site on San Miguel Island, Channel Islands National Park (SMI) were positive for Mesocestoides DNA; sequences were identical to clade A from definitive hosts at SMI. Nevertheless, deer mice failed to develop Mesocestoides infections after ingesting SMI ants.
520 $a In Chapter 3 a hypothesis-based framework was used to test whether Mesocestoides clades A, B, and C are distinct evolutionary lineages, thereby supporting classification as species. As a control, 3 other cestode species, Taenia pisiformis, T. serialis, and T. crassiceps were assessed. Using sequence data from mitochondrial rDNA (12S) and nuclear rDNA (ITS-2), derived (autapomorphic) characters were found for clades A, B, and C and T. pisiformis and T. serialis . Furthermore, multivariate analysis on morphological characters revealed significant differences among the 3 Mesocestoides clades and between T. pisiformis and T. serialis . The extent of phenotypic variation of Mesocestoides and Taenia tapeworms was similar. Results from this study support classifying Mesocestoides clades A, B, and C as separate species, and supports clade B and M. vogae as conspecific.
590 $a School code: 0029.
650 4 $a Biology, Ecology. $3 1017726
650 4 $a Biology, Veterinary Science. $3 1021733
690 $a 0329
690 $a 0778
710 2 0 $a University of California, Davis. $3 1018682
773 0 $t Dissertation Abstracts International $g 65-06B.
790 1 0 $a Boyce, Walter M., $e advisor
790 $a 0029
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3137585