Tran et al. (2004) |
2000 |
Mekong Delta (6 provinces) |
Animals in farms: pigs (faeces), chickens and ducks (caecal samples) |
439 pigs, 302 chickens, 357 ducks |
Prevalence in pig, chicken and duck samples was 5.2, 7.9, and 8.7%, respectively. Higher prevalence on small-scale farms than industrial farms |
Most common serovars: S. Javiana and S. Derby (pigs); S. Emek and S. Javiana (chickens); S. typhimurium and S. Weltvreden (ducks) |
Vo et al. (2006) |
2004 |
South Vietnam (13 provinces) |
Pigs, cattle, chickens, ducks (carcasses, faeces, meat) at farms and abattoirs; Human (faeces) |
Pigs (534), Cattle (390), Chickens (257), Ducks (34) |
Prevalence in pigs, cattle, chicken and duck samples: 49.4, 27.4, 38.5, 20.5%, respectively. |
Most common serovars: S. typhimurium and S. Anatum (pigs); S. Emek and S. Blockley (poultry); S. Anatum, S. Weltevreden, and S. Lexington (15.9%) (cattle) |
Hong et al. (2006) |
2004 |
Central Vietnam |
Pigs on smallholder farms (faeces) |
100 farms; 90 piglets with diarrhoea, 63 piglets without diarrhoea |
No difference in prevalence of NTS in piglets with and without diarrhoea (10 and 11% positive, respectively) |
|
Phan et al. (2005) |
2000–2001 |
Mekong Delta |
Fresh meat and shrimps from the market |
718 samples of meat (pork, duck, beef, chicken) and shrimps |
70% (pork); 49% (beef); 24% (shrimps); duck (22%); 21% (chicken) |
Most common serovars: S. Derby, S. Weltrvreden, and S. London (pork); S. Weltevreden, S. London, S. Dessau (beef); S. Emek, S. typhimuirum, S. Dessau (chicken); S. Lexington, S. Derby, and S. Dessau (duck); S. Dessau, S. Weltvreden and S. Tennessee (shrimps) |
Van et al. (2007) |
Unknown |
HCMC |
Fresh meat market samples |
130 samples of meat |
64% (pork); 62% (beef); 18% (chicken). |
|
Ha and Pham (2006) |
2003–2004 |
Hanoi |
Meat samples from factory, schools, hospital canteens |
177 meat samples |
8.3% poultry meat; 1.2% other meat |
|
Thai et al. (2012) |
2007–2008 |
Northern Vietnam |
Retail supermarkets |
586 meat samples |
39.6% (pork); 42.9% (chicken) |
Most common serovars: S. Emek, S. Infantis, S. Blockey, and S. Anatum (chicken); S. Anatum, S. Derby, S. typhimurium and S. Infantis (pork) |
Le Bas et al. (2006) |
Unknown |
Hanoi |
15 pig slaughterpoints (faeces, carcass swabs) |
117 faeces (caeca) and 46 carcass swabs |
52% (faeces) and 96% (carcass swabs) |
|
Ellerbroek et al. (2010) |
Unknown |
Hanoi |
6 pig slaughterpoints (lymph nodes) |
178 lymph nodes |
Prevalence from backyard small-scale farms (43%) versus intensive farms (29%) |
S. Derby (50%); S. typhimurium (27%). Most S. typhimurium isolates were phage type DT22 |
Ta et al. (2012) |
Unknown |
Six provinces (different regions) |
Wet markets and supermarkets (chicken carcasses) |
1,000 carcasses |
46%; no significant difference between study sites, temperature at retail, or wet markets versus supermarkets |
|