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Table 1 Sample size of wild boar (Sus scrofa) serum samples needed to detect a minimum prevalence of 1% with a 95% confidence level of anti-Trichinella immunoglobulin G, based on wild boar hunting management unit (HMU) surface area and boar density

From: The illegal rearing and slaughtering of pigs in the wild on the Mediterranean island of Sardinia favor an increase in the biomass of Trichinella britovi in wild boars (Sus scrofa) but do not affect the serological prevalence of infection

HMU code

HMU surface (km2)

Estimated wild boar populationa (no./km2)

Required sample size

Number of samples collected

4

471

2799 (5.9)

437

522

5

971

3734 (5.3)

435

657

6

504

2144 (4.2)

421

637

9

615

3438 (5.6)

434

848

11

704

3535 (5.0)

434

391

17

986

5872 (5.9)

447

427

23

734

4360 (5.9)

441

445

28

822

3197 (3.9)

148b

184

Total

5807

29,079 (5.2)

3197

4111

  1. aThe estimated wild boar population per HMU is based on the results of previous studies [17, 22, 23]
  2. bThe sample size was calculated based on a minimum expected prevalence of 4% with a 95% confidence level