Serotype diversity and antimicrobial susceptibility profiles of Actinobacillus pleuropneumoniae isolated in Italian pig farms from 2015 to 2022

Table 1 Prevalence of APP serotypes

Serotype	N	Prevalence	95% CI of the prevalence	% Biotype II
9/11	197	39.24	34.96–43.53	5.29
2	141	28.09	24.14–32.03	1.42
13	49	9.76	7.16–12.37	70.83
5	44	8.76	6.28–11.25	0
8	31	6.18	4.06–8.29	3.23
6	12	2.39	1.05–3.73	0
7	11	2.19	0.91–3.48	9.09
3	4	0.8	0.02–1.58	25.0
4	3	0.6	0–1.27	0
14	3	0.6	0–1.27	100
10	2	0.4	0–0.95	0
15	2	0.4	0–0.95	100
1	1	0.2	0–0.59	0
12	1	0.2	0–0.59	0
18	1	0.2	0–0.59	0

Prevalence and its 95% Confidence Interval of the successfully serotyped APP strains (n = 502) isolated from disease outbreaks occurred in north Italian swine farms from 2015 to 2022. For each serotype, the percentage of isolates belonging to biotype II is also reported.

ISSN: 1297-9716