Drug profile

The FDA adverse-event record for Recombinant E. Coli Bl21;Recombinant E. Coli Ecl19

2,588 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Recombinant E. Coli Bl21;Recombinant E. Coli Ecl19. See the species affected, top reactions, and outcomes below.

2,588
adverse-event reports
2.8%
death-coded share
Dog
most-reported species
1,724
Lack of efficacy (bacteria) - Borrelia - top reaction
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Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
2,588
Total Reports
72
Deaths Reported
2.8%
Death Rate

Active Ingredients

Recombinant E. Coli Bl21;Recombinant E. Coli Ecl19

Administration Routes

SubcutaneousUnknownOralSubconjunctivalIntramuscularIntrathoracicTopicalRectal

Species Affected

Dog 2,587
Marsupial 1

Most Affected Breeds

Retriever - Labrador 383
Retriever - Golden 251
Shepherd Dog - German 152
Terrier - Bull - American Pit 109
Shepherd Dog - Australian 98
Crossbred Canine/dog 88
Siberian Husky 70
Beagle 67
Boxer (German Boxer) 57
Mountain Dog - Bernese 54

Most Reported Reactions

Lack of efficacy (bacteria) - Borrelia 1,724
Lack of efficacy (ectoparasite) - tick NOS 862
Vomiting 287
Lack of efficacy (tick) 214
Facial swelling (see also 'Skin') 154
Lethargy (see also Central nervous system depression in 'Neurological') 148
Hives (see also 'Skin') 125
Anaphylaxis 106
Lack of efficacy (bacteria) - NOS 84
Diarrhoea 81
Pale mucous membrane 62
Fever 61

Outcome Breakdown

Ongoing
2,170 (83.8%)
Recovered/Normal
299 (11.6%)
Outcome Unknown
47 (1.8%)
Euthanized
43 (1.7%)
Died
29 (1.1%)

Recombinant E. Coli Bl21;Recombinant E. Coli Ecl19 Adverse Event Insights

2,588 reports name Recombinant E. Coli Bl21;Recombinant E. Coli Ecl19; 72 recorded a death outcome (2.8% of reported events, not a population-level mortality rate). Active ingredient: Recombinant E. Coli Bl21;Recombinant E. Coli Ecl19. Administration routes: Subcutaneous, Unknown, Oral, Subconjunctival.

By species: Dog (2,587 reports), Marsupial (1 reports). By breed: Retriever - Labrador (383), Retriever - Golden (251), Shepherd Dog - German (152).

Leading clinical signs: Lack of efficacy (bacteria) - Borrelia (1,724), Lack of efficacy (ectoparasite) - tick NOS (862), Vomiting (287), Lack of efficacy (tick) (214). Outcome, 2,588 coded reports: Ongoing leads at 83.8%.

Read these counts as reporting volume, not risk: per our methodology, a widely-prescribed drug will rack up more raw FDA reports in a given year than a rarely-used one at an identical true rate, so we recommend comparing within similar-exposure products rather than across the full 2025 catalog.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

Every figure on PlainBreed is rendered directly from FDA openFDA adverse event data, no number is typed in by an editor. This page draws directly on FDA openFDA data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.