Population biology of Toxoplasma gondii: what's out and where did they come from
Mem. Inst. Oswaldo Cruz
;
104(2): 190-195, Mar. 2009. ilus, tab
Article
in English
| LILACS
| ID: lil-533507
ABSTRACT
Until recently, Toxoplasma gondii was considered to be clonal with little genetic variability. In this paper we summarize recent genotyping data from chickens in Brazil, and pigs, lambs and white-tailed deer in the USA, to demonstrate the high genetic diversity and geographical distribution of T. gondii. A total of 149 T. gondii isolates from 13 geographical areas of Brazil and 182 T. gondii isolates from pigs, 53 isolates from sheep and 15 isolates from fetal white-tailed deer from USA were genotyped using the 10 RCFP-PCR genetic markers SAG1, SAG2, SAG3, BTUB, GRA6, c22-8, c29-2, L358, PK1 and Apico. Genotyping of 149 T. gondii isolates from free range chickens in Brazil identified 58 genotype groups. No clonal type II lineage was found. Of the 253 isolates from animals from USA, 18 genotypes were identified, predominantly type II. These studies indicate a higher genetic diversity than previously recognized.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Toxoplasma
/
Genetic Variation
/
Protozoan Proteins
/
Antigens, Protozoan
Limits:
Animals
Country/Region as subject:
North America
/
South America
/
Brazil
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2009
Type:
Article
Affiliation country:
United States
Institution/Affiliation country:
The University of Tennessee/US
/
USDA/US
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