Herd specific risk factors for Mycoplasma hyopneumoniae infections in suckling pigs at the age of weaning

Table 3 Variables and their level describing antimicrobial treatments

Variable	Level	Herds per level (%)	Herds per level (n)
Routine antibiotic treatment in suckling pigs	No	14.4	18
Routine antibiotic treatment in suckling pigs	Yes	85.6	107
Number of treatments in the first week of life	0	18.4	23
	1	63.2	79
	2	18.4	23
Type of drug in the first week	No treatment	18.4	23
	Effective against M. hyopneumoniae*	18.4	23
	Not effective against M. hyopneumoniae	63.2	79
Number of treatments in the second week of life	0	86.4	108
Number of treatments in the second week of life	1	13.6	17
Type of drug in the second week	No treatment	86.4	108
	Effective against M. hyopneumoniae*	5.6	7
	Not effective against M. hyopneumoniae	8.0	10
Routine antibiotic treatment in gilts	No	83.2	104
Routine antibiotic treatment in gilts	Yes	16.8	21
Routine antibiotic treatment in replacement boars	No	98.4	123
Routine antibiotic treatment in replacement boars	Yes	1.6	2
Routine antibiotic treatment in sows ante-partum	No	97.6	122
Routine antibiotic treatment in sows ante-partum	Yes	2.4	3
Routine antibiotic treatment in sows post-partum	No	93.6	117
	Yes	6.4	8

* Treatments with Amoxicillin, Ampicillin, Colistin and Penicillin were considered being ‘not effective against M. hyopneumoniae’. In contrast to this, all remaining antimicrobials that were used for the treatment of animals enrolled in this study were taken into account as being ‘effective against M. hyopneumoniae’. These antimicrobials namely were Apramycin, Enrofloxacin, Tetracyclin and Tulathromycin.

ISSN: 1751-0147