Table 2.
Characteristics of retrieved studies that investigated the seroprevalence of brucellosis in Chinese dairy cows, including study design, geographical location, diagnostic tests, population selection and age, and sample size.
| Study period | Study type | Province | Sample type | Diagnostic tests | Herd size | Population selection | Age group | Sample size⁎ | Animal-level prevalence (%) | Herd-level prevalence (%) | References |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2000–2009 | Cohort | Beijing | Blood | RBT + SAT | Mixed | Census | Census | 173,024 | 0.1 | – | [30] |
| 2003–2013 | Cohort | Guangxi | Blood | RBT + SAT | Not stated | Not stated | Not stated | 1039 | 2.7 | – | [31] |
| 2004–2010 | Cohort | Zhejiang | Blood | RBT + SAT | Mixed | Census | Census | 110,220 | 1.5 | – | [32] |
| 2007 | Cross-sectional | Zhejiang | Blood | RBT + SAT | Not stated | Not stated | Not stated | 1071 | 2.4 | – | [33] |
| 2007–2011 | Cohort | Qinghai | Blood | RBT + SAT | Not stated | Not stated | Not stated | 138,350 | 0.3 | – | [34] |
| 2009–2011 | Cross-sectional | 15 provinces | Milk | PCR | Large-scale | Stratified randomized | > 2 years | 5211 | 1.1 | – | [35] |
| 2009–2011 | Cross-sectional | Inner Mongolia | Blood | RBT + SAT | Mixed | Not stated | Not stated | 5875 (196) | 6.2 | 26.5 | [36] |
| 2009–2013 | Cohort | Gansu | Blood | RBT + SAT | Not stated | Not stated | Not stated | 10,742 | 2.0 | – | [37] |
| 2012 | Cross-sectional | Shandong | Blood | RBT + SAT | Mixed | Census | > 3 months | 30,119 (1803) | 0.4 | 2.6 | [38] |
| 2012 | Cross-sectional | Shandong | Blood | RBT + SAT | Not stated | Not stated | Not stated | 333 | 1.5 | – | [39] |
| 2012 | Cross-sectional | Qinghai | Blood | RBT + SAT | Not stated | Stratified randomized | Not stated | 18,282 | 0.2 | – | [40] |
| 2012–2013 | Cross-sectional | Shandong | Blood | RBT + SAT | Mixed | Simple randomized | Not stated | 485 (13) | 4.9 | 15.4 | [41] |
| 2012–2013 | Cross-sectional | Heilongjiang | Blood | RBT + SAT | Mixed | Not stated | Not stated | 1590 | 1.1 | – | [42] |
| 2013 | Cross-sectional | Liaoning | Blood | RBT + SAT | Mixed | Census | Census | 37,888 (187) | 0.2 | 10.2 | [43] |
| 2013 | Cross-sectional | Hebei | Blood | RBT + SAT | Large-scale | Not stated | > 6 months | 4279 (109) | 0.1 | 5.5 | [44] |
| 2013–2014 | Cross-sectional | Heilongjiang | Blood | I-ELISA + C-ELISA | Large-scale | Not stated | Not stated | 4131 (22) | 12.3 | 77.3 | [45] |
| 2013–2017 | Cohort | Sichuan | Blood | RBT + SAT | Not stated | Stratified randomized | > 12 month | 5598 | 0.2 | – | [46] |
| 2013–2017 | Cohort | Gansu | Blood | RBT + SAT | Not stated | Not stated | > 8 months | 1431 (160) | 4.5 | 7.5 | [47] |
| 2014 | Cross-sectional | Xinjiang | Blood | RBT + SAT | Large-scale | Not stated | > 6 months | 987 (3) | 6.5 | 100.0 | [48] |
| 2015 | Cross-sectional | Henan | Blood | RBT | Mixed | Census | Census | 218 (5) | 7.8 | 100.0 | [49] |
| 2015 | Cross-sectional | Yunan | Blood | RBT + SAT | Large-scale | Not stated | Not stated | 223 | 13.5 | – | [50] |
| 2015–2017 | Cohort | Sichuan | Blood | RBT + SAT | Mixed | Census | Census | 159,071 (1157) | 0.7 | 19.5 | [51] |
| 2015–2017 | Cross-sectional | Guizhou | Blood | RBT + SAT | Mixed | Simple randomized | Not stated | 25,910 (148) | 0.1 | 4.1 | [52] |
| 2017–2018 | Cross-sectional | Xinjiang | Blood | RBT + C-ELISA | Smallholder | Stratified randomized | > 2 years | 1406 | 6.8 | – | [53] |
| 2017–2019 | Cross-sectional | Inner Mongolia | Blood | RBT + SAT | Mixed | Stratified randomized | Not stated | 1758 | 2.7 | – | [54] |
| 2018 | Cross-sectional | Xinjiang | Blood | RBT + SAT | Mixed | Simple randomized | Not stated | 1203 | 4.7 | – | [55] |
| 2018 | Cross-sectional | Henan | Blood | RBT + SAT | Mixed | Simple randomized | Not stated | 25,088 (581) | 0.8 | 7.2 | [56] |
| 2018 | Cross-sectional | Shannxi | Blood | RBT + SAT | Not stated | Stratified randomized | Not stated | 92 (3) | 0.0 | 0.0 | [57] |
| 2019 | Cross-sectional | Henan | Blood | RBT + SAT | Mixed | Census | Census | 12,755 (68) | 2.2 | 33.8 | [58] |
| 2020 | Cross-sectional | Hainan | Blood | RBT + SAT | Large-scale | Simple randomized | Census | 1690 (2) | 0.0 | 0.0 | [59] |
| 2021 | Cross-sectional | Shandong | Blood | RBT + SAT | Mixed | Not stated | Not stated | 49,080 (1079) | 0.5 | 2.9 | [60] |
| 2021 | Cross-sectional | Xinjiang | Blood | RBT + SAT | Not stated | Not stated | Not stated | 7102 | 0.6 | – | [61] |
⁎: Number of animals tested (Number of farms tested); −: not available; RBT: Rose Bengal Test; SAT: Serum Agglutination Test; C-ELISA: competitive Enzyme-linked Immunosorbent Assay.