Relationship between Serum Antibodies and Taenia solium Larvae Burden in Pigs Raised in Field Conditions

Details

• Alternative Title:
  PLoS Negl Trop Dis
• Personal Author:
  Gavidia, Cesar M. ; Verastegui, Manuela R. ; Garcia, Hector H. ; Lopez-Urbina, Teresa ; Tsang, Victor C. W. ; Pan, William ; Gilman, Robert H. ; Gonzalez, Armando E.
• Corporate Authors:
  Cysticercosis Working Group in Peru
• Description:
  Background
  
  Serological tests have been used for the diagnosis of Taenia solium infection in pigs. However, those serological results do not necessarily correlate with the actual infection burden after performing pig necropsy. This study aimed to evaluate the Electro Immuno Transfer Blot (EITB) seropositivity with infection burden in naturally infected pigs.
  
  Methodology/Principal Findings
  
  In an endemic area of Peru, 476 pigs were sampled. Seroprevalence was 60.5±4.5% with a statistically higher proportion of positive older pigs (>8 months) than young pigs. The logistic model showed that pigs >8 month of age were 2.5 times more likely to be EITB-positive than ≤8 months. A subset of 84 seropositive pigs were necropsied, with 45.2% (38/84) positive to 1–2 bands, 46.4% (39/84) to 3 bands, and 8.3% (7/84) to 4+ bands. 41 out of 84 positive pigs were negative to necropsy (48.8%) and 43 (51%) had one or more cysts (positive predictive value). Older pigs showed more moderate and heavy infection burdens compared to younger pigs. In general, regardless of the age of the pig, the probability of having more cysts (parasite burden) increases proportionally with the number of EITB bands.
  
  Conclusions/Significance
  
  The probability of being necropsy-positive increased with the number of bands, and age. Therefore, the EITB is a measure of exposure rather than a test to determine the real prevalence of cysticercosis infection.
  
  
• Subjects:
  Animals Antibodies, Helminth Cysticercosis Larva Parasite Load Serum Swine Swine Diseases Taenia Solium
• Source:
  PLoS Negl Trop Dis. 2013; 7(5).
• Pubmed ID:
  23658848
• Pubmed Central ID:
  PMC3642188
• Document Type:
  Journal Article
• Funding:
  P01 AI51976/AI/NIAID NIH HHS/United States ; U01 AI35894/AI/NIAID NIH HHS/United States ; 063109/Wellcome Trust/United Kingdom ; TW05562/TW/FIC NIH HHS/United States ; 091077/Wellcome Trust/United Kingdom
• Place as Subject:
  Peru
• Volume:
  7
• Issue:
  5
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:72994d73f926900a8d4ec021c8606ccd08f42d9d179e414197cca3d2c475b7ce
• Download URL:
  https://stacks.cdc.gov/view/cdc/46362/cdc_46362_DS1.pdf
• File Type:
  [PDF - 172.51 KB ]