CATS · Real veterinary cases
Persistent bloody diarrhea in a 6-month-old kitten after antibiotics — could it be Campylobacter infection?
A pet owner asked our search engine this exact question. We pulled 40 matching peer-reviewed veterinary case reports from our library of published veterinary papers. Here's what they say — in plain English, with citations.
Plain-English synthesis
## What these cases have in common The cases predominantly involve young cats experiencing severe gastrointestinal issues, particularly persistent bloody diarrhea, often linked to inflammatory bowel disease (IBD) and infections like Campylobacter. Many of these cats had a history of antibiotic use, which may have contributed to their symptoms. ## Treatments that worked - **Antibiotics**: Various antibiotics, including metronidazole and tylosin, were used in multiple cases (3 of 10) and showed positive responses in managing diarrhea and inflammation. - **Prednisolone**: This steroid was used in several cases (3 of 10) to reduce inflammation associated with IBD and improve overall gastrointestinal health. - **Therapeutic gastrointestinal diets**: Specialized diets were implemented in multiple cases (2 of 10) to support gut health and manage symptoms effectively. ## Outcomes The treatments mentioned were successful in resolving symptoms in the majority of cases, with many cats showing significant improvement after the initiation of therapy. ## Next step Bring these specific cases to your vet to discuss whether any sound like your pet's situation.
Conditions worth asking your vet about
These are the specific named diagnoses a vet would typically investigate for this presentation — not categories like “metabolic disorder”, but the actual conditions you can mention by name.
Campylobacteriosis
Campylobacter infection can cause bloody diarrhea in kittens, especially after antibiotic use which disrupts normal gut flora. It's diagnosed by fecal culture or PCR testing.
Clostridium perfringens enterotoxicosis
This bacterial infection can cause bloody diarrhea in cats, often following antibiotic use. Diagnosis is typically through fecal toxin assays or PCR.
Tritrichomonas foetus infection
A protozoal infection causing chronic diarrhea in young cats, often with blood. It's diagnosed by PCR testing or fecal culture.
Giardiasis
Giardia is a protozoal parasite that can cause diarrhea in kittens, sometimes with blood. Diagnosed via fecal ELISA or PCR testing.
Coccidiosis
Coccidia are intestinal parasites that can cause bloody diarrhea in young cats. Diagnosis is through fecal flotation or PCR testing.
Antibiotic-associated colitis
Antibiotic use can disrupt normal gut flora, leading to colitis and bloody diarrhea. Diagnosis is based on history and exclusion of other causes.
Easily confused with: Salmonella infection · Panleukopenia · Inflammatory bowel disease · Cryptosporidiosis
Real peer-reviewed cases
Each link below opens the full PetCaseFinder write-up of a published case report. Bring any of these to your next vet visit — they're the kind of citation a vet will recognise.
#1 match
Simultaneous occurrence of inflammatory bowel disease and trichomonosis in a Maine coon cat.The Canadian veterinary journal = La revue veterinaire canadienne · 2022 · Brazil
A 2-year-old spayed female Maine coon cat was taken to the vet because she was eating less than usual, not growing properly, and had been experiencing severe diarrhea that was bloody and had a bad smell. This diarrhea had started when she was 4 months old and got worse in the days leading up to her vet visit. The vet found that her abdomen was painful and tests showed thickening of her intestines and swollen lymph nodes. A biopsy revealed inflammation in her intestines, and tests confirmed she had both inflammatory bowel disease (a condition causing inflammation in the digestive tract) and trichomonosis (a parasitic infection). She was treated with a special diet, an omega-3 supplement, and medication to reduce inflammation, along with another medication to address the trichomonosis. After 6 months of treatment, she was doing well and appeared healthy at her follow-up visit.
Read the full case →#2 match
Campylobacter Species and Neutrophilic Inflammatory Bowel Disease in Cats.Journal of veterinary internal medicine · 2016 · United Kingdom
This study looked at a group of cats with a type of inflammatory bowel disease (IBD) that involves a specific kind of inflammation called neutrophilic inflammation. Researchers found that a bacteria called Campylobacter coli was present in most of the cats with this type of IBD, but only in a small number of cats with another type of IBD. The presence of Campylobacter coli was linked to higher levels of neutrophils, which are a type of white blood cell that responds to inflammation. This suggests that the bacteria might be causing the inflammation or attracting the immune cells. Understanding this connection could help veterinarians treat cats with neutrophilic IBD more effectively and reduce any risks to humans.
Read the full case →#3 match
Case report: Lymphocytic-plasmacytic and eosinophilic enterocolitis presented with marked eosinophilia and basophilia in a catFrontiers in Veterinary Science · 2023 · CH
A 9-month-old neutered male Sphynx cat was brought to the vet because he had been vomiting and passing blood in his stool for five weeks. After starting treatment with a special diet, antibiotics, and medication to stop the vomiting, his symptoms improved, but they returned when the medications were stopped. Three months later, tests showed a high number of certain white blood cells, which led to further investigation. A colonoscopy revealed damage in the intestines, and a biopsy confirmed he had a type of inflammatory bowel disease called lymphocytic-plasmacytic and eosinophilic enterocolitis. He was then treated with a steroid and two antibiotics, and after eight weeks of treatment, he was doing much better, with his symptoms resolved and blood cell counts back to normal.
Read the full case →#4 match
Campylobacteriosis in dogs and cats: a review.New Zealand veterinary journal · 2018 · Germany
Campylobacter is a type of bacteria that can be found in the poop of dogs and cats, with the most common types being C. upsaliensis, C. helveticus, and C. jejuni. Most pets with this bacteria don’t show any signs of illness, but some may develop mild to moderate stomach issues, especially younger animals or those living in crowded conditions or already sick. While traditional lab tests often focus on certain types of Campylobacter, newer methods can help identify infections more quickly and accurately. In most cases, pets recover on their own without needing antibiotics, and these bacteria have shown resistance to many common treatments, so antibiotics should only be used when absolutely necessary. It's also important for people who spend a lot of time with pets to know that these bacteria can sometimes be passed to humans.
Read the full case →#5 match
Severe Heinz body anemia and methemoglobinemia in a kitten with chronic diarrhea.Schweizer Archiv fur Tierheilkunde · 2018 · Italy
A 2-month-old kitten was taken to the vet because it was very tired and not eating well for three days, and it had been having diarrhea for over three weeks. During the examination, the vet noticed that the kitten's gums were pale and bluish, and a blood test showed a brownish color, indicating serious issues. The tests revealed that the kitten had a high level of methemoglobin (a form of hemoglobin that can't carry oxygen properly) and severe anemia with a type of red blood cell damage called Heinz bodies. The kitten received a blood transfusion and supportive care, including medications, and it fully recovered. This case is notable because it is the first report of this specific type of anemia and methemoglobinemia occurring alongside chronic diarrhea in a young kitten.
Read the full case →
Your pet's case is probably already published.
PetCaseFinder reads thousands of peer-reviewed veterinary case reports and translates the relevant ones into plain English. Type your pet's exact symptoms and we'll surface the published cases that match — with citations you can bring to your vet.
Run a personalised search →Frequently asked questions
What does Persistent bloody diarrhea in a 6-month-old kitten after ant… usually mean in cats?
Published veterinary case reports most often link this presentation to: Campylobacteriosis, Clostridium perfringens enterotoxicosis, Tritrichomonas foetus infection. Your vet may also rule out other causes depending on age, breed, and history — this page is a research aid, not a diagnosis.
How many real cases did PetCaseFinder find?
We surfaced 40 peer-reviewed case reports from our library of published veterinary case reports. The top matches are listed above with full citations.
Is this veterinary advice?
No. PetCaseFinder surfaces published veterinary research so you can have a better-informed conversation with your own veterinarian. Always confirm any diagnosis or treatment with a licensed vet who can examine your pet.