The Sanitized Language of the Laboratory
Toxicology reports do not describe dogs suffering and dying. They describe test systems exhibiting clinical signs before scheduled sacrifice. This glossary translates the euphemisms back into plain language.
Animals and the Drug
| What they say | What it means |
|---|---|
| Test system | The live animals |
| Test article / test substance | The drug being tested |
| Non-rodent species | Dogs — almost always beagles |
| Vehicle control | Animals given only the inactive carrier (placebo group) |
| Naïve animals | Animals never previously experimented on |
| Satellite group / recovery animals | Animals kept alive after dosing to see if damage reverses |
Dosing
| What they say | What it means |
|---|---|
| Oral gavage | Inserting a tube down the throat to force-feed |
| Dose administration | Forcing the animal to take the drug |
| Capsule administration | Placing a capsule in the mouth/throat |
| Dose-ranging / dose escalation | Increasing doses until toxicity appears |
| mg/kg/day | Milligrams of drug per kilogram of body weight per day |
Killing
| What they say | What it means |
|---|---|
| Sacrifice / scheduled sacrifice | Deliberately killing at the planned endpoint |
| Terminal sacrifice / scheduled necropsy | Killing to dissect and examine organs |
| Interim sacrifice | Killing some animals partway through the study |
| Moribund sacrifice | Killing because the animal is dying from the drug |
| Found dead | Animal died unexpectedly — often from toxicity |
| Necropsy | Dissecting the dead body to examine organs |
| Predictable death | OECD: "presence of clinical signs indicative of death at a known time" |
Symptoms and Suffering
| What they say | What it means |
|---|---|
| Clinical signs / clinical observations | Visible symptoms of suffering |
| Findings / test article-related findings | Injuries or diseases caused by the drug |
| Emesis | Vomiting |
| Excessive salivation / ptyalism | Drooling — sign of nausea |
| Decreased activity / hypoactivity | Too weak or sick to move |
| Prostration | Lying flat, unable to stand — near death |
| Moribund condition | Actively dying |
| Inappetence | Refusal to eat |
| Tremors / convulsions | Involuntary shaking or seizures |
Classification
| What they say | What it means |
|---|---|
| Adverse vs non-adverse | Whether the drug effect is officially "harmful" |
| Adaptive response | Classified as the body adjusting, not being harmed |
| NOAEL | Highest dose at which no harm is officially determined |
| Reversibility | Whether effects disappear after dosing stops — used to downgrade severity |
Pathology Terms
Found in the histopathology section of every necropsy report. These describe what the drug did to the dog's organs.
| What they say | What it means |
|---|---|
| Hepatocellular necrosis | Liver cell death |
| Renal tubular degeneration | Kidney tubes breaking down |
| Centrilobular hypertrophy | Liver cells swelling around the central vein — early toxic injury |
| Glomerulonephropathy | Kidney filtration units damaged |
| Myocardial degeneration | Heart muscle breaking down |
| Thymic atrophy | Immune organ shrinking — sign of severe stress or toxicity |
| Mucosal erosion / ulceration | Stomach or intestinal lining eaten away |
| Myeloid hyperplasia | Bone marrow overproducing white blood cells in response to damage |
Translation Test
Take a real sentence from a toxicology report and translate it word by word.
“Three animals in the high-dose group were found moribund and sacrificed; clinical signs included emesis, inappetence, and prostration.”
“Three dogs were dying from the drug — vomiting, unable to eat, too weak to stand — and were killed.”
“Test article-related findings included hepatocellular necrosis and renal tubular degeneration in the non-rodent species at the high dose level. These findings were not observed in satellite recovery animals, indicating reversibility.”
“The drug destroyed liver cells and broke down kidney tubes in dogs at the highest dose. Dogs kept alive after dosing stopped showed some recovery, which was used to classify the damage as less serious.”