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Potentially hazardous Streptococcus suis strains latent in asymptomatic pigs in a major swine production area of Thailand.

Abstract Carrier pigs have been considered as the major reservoir of Streptococcus suis and couldbe a significant source of human infection. Therefore, we investigated the prevalence and characteristics of latent S. suis in asymptomatic pigs in the pig-farming area of central Thailand, and compared the data to those previously reported in other regions.
PMID
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Authors

Mayor MeshTerms
Keywords
Journal Title journal of medical microbiology
Publication Year Start




PMID- 28516843
OWN - NLM
STAT- MEDLINE
DA  - 20170518
DCOM- 20170614
LR  - 20170614
IS  - 1473-5644 (Electronic)
IS  - 0022-2615 (Linking)
VI  - 66
IP  - 5
DP  - 2017 May
TI  - Potentially hazardous Streptococcus suis strains latent in asymptomatic pigs in a
      major swine production area of Thailand.
PG  - 662-669
LID - 10.1099/jmm.0.000483 [doi]
AB  - PURPOSE: Carrier pigs have been considered as the major reservoir of
      Streptococcus suis and couldbe a significant source of human infection.
      Therefore, we investigated the prevalence and characteristics of latent S. suis
      in asymptomatic pigs in the pig-farming area of central Thailand, and compared
      the data to those previously reported in other regions. METHODOLOGY: We collected
      samples from 340 asymptomatic pigs. S. suis isolates from the samples were
      confirmed by species-specific PCR (recN PCR). The capsular polysaccharide
      synthesis gene (cps) types, virulence-associated gene profiles and sequence types
      (STs) of the isolates were investigated.Results/Key findings. The prevalence of
      S. suis found in this study was 37 % (125/340 pigs). The most prevalent genotype 
      was mrp-/epf-/sly-. Among the 16 cps-types identified in 135 isolates, cps-type
      16 was the most frequent (11 %), whereas 44 % of the isolates were non-typable.
      In common with the strains causing human sepsis in Thailand, two cps-type 9
      isolates and a cps-type 24 isolate from slaughtered pigs belonged to ST16 and
      ST221, respectively. All the isolated cps-type 2 strains were confirmed as
      serotype 2 by co-agglutination tests, and these belonged to ST104, the unique ST 
      commonly found in Thai patients; however, in contrast to the endemic areas, the
      prevalence of serotype 2 strains was relatively low (2 %) and no ST1 isolate was 
      found. CONCLUSION: Our results showed the population structure differences
      between S. suis in central Thailand and other regions; however, zoonotic S. suis 
      is certainly latent in asymptomatic pigs in this intensive swine production area.
FAU - Meekhanon, Nattakan
AU  - Meekhanon N
AD  - 1Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart
      University, Bangkok 10900, Thailand.
FAU - Kaewmongkol, Sarawan
AU  - Kaewmongkol S
AD  - 1Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart
      University, Bangkok 10900, Thailand.
FAU - Phimpraphai, Waraphon
AU  - Phimpraphai W
AD  - 2Department of Veterinary Public Health, Faculty of Veterinary Medicine,
      Kasetsart University, Nakhon Pathom 73140, Thailand.
FAU - Okura, Masatoshi
AU  - Okura M
AD  - 3Division of Bacterial and Parasitic Diseases, National Institute of Animal
      Health, National Agriculture and Food Research Organization, Tsukuba, Ibaraki
      305-0856, Japan.
FAU - Osaki, Makoto
AU  - Osaki M
AD  - 3Division of Bacterial and Parasitic Diseases, National Institute of Animal
      Health, National Agriculture and Food Research Organization, Tsukuba, Ibaraki
      305-0856, Japan.
FAU - Sekizaki, Tsutomu
AU  - Sekizaki T
AD  - 4Research Center for Food Safety, Graduate School of Agricultural and Life
      Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
FAU - Takamatsu, Daisuke
AU  - Takamatsu D
AD  - 3Division of Bacterial and Parasitic Diseases, National Institute of Animal
      Health, National Agriculture and Food Research Organization, Tsukuba, Ibaraki
      305-0856, Japan 5The United Graduate School of Veterinary Sciences, Gifu
      University, Gifu 501-1193, Japan.
LA  - eng
PT  - Journal Article
DEP - 20170518
PL  - England
TA  - J Med Microbiol
JT  - Journal of medical microbiology
JID - 0224131
RN  - 0 (Virulence Factors)
SB  - IM
MH  - Agglutination Tests
MH  - Animals
MH  - Asymptomatic Infections/*epidemiology
MH  - Carrier State/microbiology
MH  - Disease Reservoirs/microbiology
MH  - Genotype
MH  - Polymerase Chain Reaction
MH  - Prevalence
MH  - Serogroup
MH  - Serotyping
MH  - Streptococcal Infections/epidemiology/*veterinary
MH  - Streptococcus suis/*isolation & purification/*pathogenicity/physiology
MH  - Swine
MH  - Swine Diseases/*epidemiology/*microbiology
MH  - Thailand/epidemiology
MH  - Virulence
MH  - Virulence Factors/genetics
MH  - Zoonoses/microbiology
EDAT- 2017/05/19 06:00
MHDA- 2017/06/15 06:00
CRDT- 2017/05/19 06:00
AID - 10.1099/jmm.0.000483 [doi]
PST - ppublish
SO  - J Med Microbiol. 2017 May;66(5):662-669. doi: 10.1099/jmm.0.000483. Epub 2017 May
      18.

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