Can garlic prevent, repel or kill fleas that infest dogs?

Abstract

PICO question
 In dogs, is oral or topical administration of garlic, compared to no treatment, efficacious at preventing or reducing parasitism by fleas?
 
 Clinical bottom line
 Category of research question
 Treatment
 The number and type of study designs reviewed
 Zero
 Strength of evidence
 Critical appraisal of the selected papers meeting the inclusion criteria collectively provide zero evidence in terms of their experimental design and implementation
 Outcomes reported
 The outcomes reported were none
 Conclusion
 It is concluded that there is a lack of peer-reviewed scientific in vivo evidence to address the PICO
 
 How to apply this evidence in practice
 The application of evidence into practice should take into account multiple factors, not limited to: individual clinical expertise, patient’s circumstances and owners’ values, country, location or clinic where you work, the individual case in front of you, the availability of therapies and resources.
 Knowledge Summaries are a resource to help reinforce or inform decision-making. They do not override the responsibility or judgement of the practitioner to do what is best for the animal in their care.