ScienceShot: A 270-Million-Year-Old Tapeworm Infection

2021 ◽  
Keyword(s):  
Tapeworm Infection

Quantitative Trait Loci for Susceptibility to Tapeworm Infection in the Red Flour Beetle

Genetics ◽  
2003 ◽  
Vol 165 (3) ◽  
pp. 1307-1315
Author(s):  
Daibin Zhong ◽  
Aditi Pai ◽  
Guiyun Yan
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Genetic Basis ◽  
Life Cycles ◽  
Red Flour Beetle ◽  
Phenotypic Variance ◽  
Flour Beetle ◽  
Trait Loci ◽  
Host Ecology ◽  
Tapeworm Infection

Abstract Parasites have profound effects on host ecology and evolution, and the effects of parasites on host ecology are often influenced by the magnitude of host susceptibility to parasites. Many parasites have complex life cycles that require intermediate hosts for their transmission, but little is known about the genetic basis of the intermediate host's susceptibility to these parasites. This study examined the genetic basis of susceptibility to a tapeworm (Hymenolepis diminuta) in the red flour beetle (Tribolium castaneum) that serves as an intermediate host in its transmission. Quantitative trait loci (QTL) mapping experiments were conducted with two independent segregating populations using amplified fragment length polymorphism (AFLP) markers and randomly amplified polymorphic DNA (RAPD) markers. A total of five QTL that significantly affected beetle susceptibility were identified in the two reciprocal crosses. Two common QTL on linkage groups 3 and 6 were identified in both crosses with similar effects on the phenotype, and three QTL were unique to each cross. In one cross, the three main QTL accounted for 29% of the total phenotypic variance and digenic epistasis explained 39% of the variance. In the second cross, the four main QTL explained 62% of the variance and digenic epistasis accounted for only 5% of the variance. The actions of these QTL were either overdominance or underdominance. Our results suggest that the polygenic nature of beetle susceptibility to the parasites and epistasis are important genetic mechanisms for the maintenance of variation within or among beetle strains in susceptibility to tapeworm infection.

Cerebral sparganosis

1990 ◽  
Vol 73 (1) ◽  
pp. 147-150 ◽  
Author(s):  
Andrew Mitchell ◽  
Bernd W. Scheithauer ◽  
Patrick J. Kelly ◽  
Glenn S. Forbes ◽  
Jon E. Rosenblatt
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Surgical Removal ◽  
Asian Countries ◽  
Content Type ◽  
Chronic Abscess ◽  
The Central Nervous System ◽  
Cerebral Sparganosis ◽  
Tapeworm Infection ◽  
Fine Print

✓ The tapeworm Spirometra mansonoides infects man worldwide, particularly in Asian countries. Rarely, the central nervous system is involved; such a case is presented here. In the total of 12 reported cases, including the case described, the worm presented clinically as a mass suspicious for neoplasm or chronic abscess cavity. Surgical removal was invariably curative in each case. Although infrequent, the possibility of tapeworm infection should be entertained in the evaluation of intracranial masses in patients who have visited exotic locales.

scholarly journals Echinococcus canadensis G8 Tapeworm Infection in a Sheep, China, 2018

2019 ◽  
Vol 25 (7) ◽  
pp. 1420-1422 ◽  
Author(s):  
Ruiqi Hua ◽  
Yue Xie ◽  
Hongyu Song ◽  
Yuan Shi ◽  
Jiafei Zhan ◽  
...  
Keyword(s):  
Echinococcus Canadensis ◽  
Tapeworm Infection

Differential diagnosis of Moniezia benedeni and M. expansa (Anoplocephalidae) by PCR using markers in small ribosomal DNA (18S rDNA)

2013 ◽  
Vol 61 (4) ◽  
pp. 463-472 ◽  
Author(s):  
HongBin Yan ◽  
XinWen Bo ◽  
Youyu Liu ◽  
Zhongzi Lou ◽  
XingWei Ni ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Ribosomal Dna ◽  
Nuclear Ribosomal Dna ◽  
Dna Diagnosis ◽  
Worldwide Distribution ◽  
Faecal Samples ◽  
Infected Goat ◽  
Polymerase Chain ◽  
Low Levels ◽  
Tapeworm Infection

Moniezia benedeniandM. expansaare common ruminant tapeworms of worldwide distribution, causing gastrointestinal disorders and even death in sheep and goats. In this study, a polymerase chain reaction- (PCR-) based approach for precise species identification was developed and also applied to faecal DNA diagnosis of the tapeworm infection. Since nuclear ribosomal DNA (rDNA) appears to be a useful target for species and/or strain markers, the 18S regions of the rDNA ofM. benedeniandM. expansawere amplified and sequenced. The lengths and GC contents of the regions sequenced were 2476–2487 bp and 51.9–52.1% forM. benedeniand 2473 bp and 51.9–52.0% forM. expansa, respectively. Alignment and comparison of the 18S sequences of the two species showed 92.5–93.3% homology. No matches for the 18S regions ofM. benedeniandM. expansawere found with other species by BLAST search, which made the 18S sequences appropriate markers for the design of distinctive primers for the twoMonieziaspecies. Our 18S-based PCR could detect as low levels as 0.5 pg genomic DNA or the DNA extracted from 0.2 g faecal sample collected from the rectum of anM. expansa-infected goat. The results indicate that this PCR approach is a reliable alternative for the differential diagnosis ofMonieziaspecies in faecal samples.

scholarly journals Tapeworm infection identified on capsule endoscopy

2012 ◽  
Vol 2 (1) ◽  
pp. 19-19 ◽  
Author(s):  
Shao-Qi Yang ◽  
Rui Huang ◽  
Li-Na Zhang ◽  
Jian-Guo Hu ◽  
Li Yang
Keyword(s):  
Capsule Endoscopy ◽  
Tapeworm Infection

scholarly journals Low Back Pain and Foot Drop Associated with Dog Tapeworm Infection

2021 ◽  
Vol 104 (1) ◽  
pp. 4-4
Author(s):  
Ayush Agarwal ◽  
Venugopalan Y. Vishnu ◽  
Ajay Garg
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Foot Drop ◽  
Low Back ◽  
Tapeworm Infection

Tapeworm infection in donkeys

1995 ◽  
Vol 136 (18) ◽  
pp. 475-475 ◽  
Author(s):  
C. Proudman ◽  
R. Ellis
Keyword(s):  
Tapeworm Infection
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