GUT HEAL ▶▶▶TH
Table 2 – Summary of top five medically impor- tant antibiotics sold for use in US swine produc- tion (only) for the period 2016-2018.
Antibiotic class 2016* Sales (kg) 2017 Sales (kg) 2018 Sales (kg) % Change % Change (2016-2018) (2018 vs 2017) -25 -43 -12 38 13
Tetracyclines Macrolides
Lincosamides
2,520,680 337,295 118,916
Aminoglycosides 65,850 Sulfas
40,215
1,579,145 189,503 128,642 63,602 31,024
*2016 – Last year before VFD guidelines fully implemented.
says, “and are well along to making the adjustments needed to meet VFD guidelines for reduced antibiotic use.”
Non-MIA use and antimicrobial alternatives In the US, sales of non-MIAs such as ionophores increased by about 5% in 2018 for all livestock, but the sales dropped back down by the same amount in 2019. No one is sure how much was used in pigs because these medications are not medical- ly important to human health; therefore, their use is not
The Nutrix Effect: Well-fed and satisfied suckling piglets.
1,902,950 192,175 104,527 90,779 45,581
21 1
-19 43 47
tracked carefully and a breakdown by species is not available. However, Dr Rademacher can say that use of some non-MIAs (particularly Narasin) in US pig production did increase slight- ly in 2018, but he adds that “many US producers found that they could eliminate the use of low levels of antibiotics used for growth promotion and didn’t notice any significant change in performance”. Dr Thompson does think there would be “a strong market for non-antibiotic approaches to prevent scours in pigs, especial- ly if they could be delivered in-feed or water and delivered consistent benefits”. And while he’s not aware of a pro- or prebiotic currently marketed for pigs that consistently deliv- ers scour-prevention efficacy similar to antibiotics, he says “there is a lot of good research now”. Dr Rademacher adds that one of the biggest challenges for many of the bacterial disease problems in US swine farming is the lack of truly efficacious vaccines that could replace antibiotic use. “We did see an increase in the implementation of the commercial vaccines for Lawsonia intracellularis (ileitis) that was used to replace some medically important feed medications,” Dr Rademacher reports. “We also have seen re- newed interest in autogenous vaccines for respiratory bacteria ( Glaesserella parasuis or Streptococcus suis) with mixed results.”
Nutrix by WEDA:
» needs-based feeding at maximum hygiene » high weaning weights – up to 1 kg more per piglet!
22 ▶ PIG PROGRESS | Volume 37, No. 2, 2021
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