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Cats | Zoonoses
The full contents of the "zoonoses" column in the 12-column knowledge tree for cats. Where the original text could not obtain an authoritative figure, it leaves the field blank and states why; this site preserves that as-is and does not fill in numbers on its behalf. The disease column is published separately as vet/cat-common-diseases and is not repeated here.
Cats | Zoonoses
This article is compiled from the cat chapter of the veterinary animal encyclopaedia. The same sign calls for different handling in different species, and copying what works for another species can do harm — first confirm which animal you are dealing with.
| Disease | Pathogen | Route of transmission | Presentation in humans | High-risk groups | Key points for prevention |
|---|---|---|---|---|---|
| Rabies | Lyssavirus | Bites, scratches, mucous-membrane contact with saliva | Neurological signs; once clinical, almost no possibility of treatment | Everyone | Vaccination and management according to local regulation; seek medical care immediately after a bite from an unknown animal (handled on the human-medicine side, outside the scope of this file) |
| Cat-scratch disease | *Bartonella henselae* | Flea → cat → human (scratches, bites, wound contact with claw contamination) | Local pustule, lymph-node swelling, fever | Immunocompromised people can develop systemic severe disease | Flea control is the core; trim claws; do not use hands to provoke biting play; wash wounds immediately |
| Toxoplasmosis | *Toxoplasma gondii* | Oocysts in cat faeces (they need a period of time after being shed before becoming infective, AVMA: "After about 1 to 5 days in the environment, these oocysts become infective" <https://www.avma.org/resources-tools/pet-owners/petcare/toxoplasmosis>, verified 2026-07-30, hence the advice to scoop daily); in humans it more often comes from undercooked meat and contaminated raw vegetables | Mostly asymptomatic; a first infection during pregnancy can cause congenital infection; brain lesions in the immunocompromised | Pregnant women, immunocompromised people | A pregnant woman does not need to give the cat away: scoop the litter daily (ideally have someone else do it), wear gloves, wash hands afterwards, do not feed the cat raw meat, do not let it roam and hunt, and do not put the litter box in the kitchen |
| Dermatophytosis (commonly called ringworm) | *Microsporum canis* and others | Direct contact, environmental spores | Round scaly red patches, itching | Children, the elderly, the immunocompromised | Check kittens and long-haired cats before they enter the home; disinfect the environment during treatment; do not share grooming tools |
| Salmonella / Campylobacter | *Salmonella*, *Campylobacter* | Faecal-oral; carriage rates rise in raw-fed cats | Gastroenteritis | Young children, the elderly, the immunocompromised | Do not feed raw diets; wash hands after handling cat faeces and food bowls |
| Feline roundworm infection (visceral / ocular larva migrans) | *Toxocara cati* | Accidental ingestion of embryonated eggs from the environment (sandpits, soil) | Visceral or ocular larva migrans, which can damage vision | Young children | Deworm regularly, scoop daily, keep the litter box away from children's play areas, cover sandpits |
| Cutaneous larva migrans from hookworm | Hookworm larvae | Larvae penetrate the skin | Winding red linear skin lesions, itching | People who often go barefoot on contaminated soil | Deworming, proper disposal of faeces |
| Flea-borne rickettsiae and tapeworm | *Rickettsia* spp., *Dipylidium caninum* | Flea bites / accidental ingestion of a flea | Fever and rash / tapeworm segments in children | Young children | Year-round flea control |
| Pasteurella bite infection | *Pasteurella multocida* and others | Cat bites (the long slender teeth create deep punctures — small on the surface but deep) | Rapid redness, swelling, heat and pain, cellulitis, joint-space infection | Everyone | A cat bite (especially to the hand) must be assessed by a doctor; do not dismiss it because the wound looks small |
| Transient notoedric / ear mite infestation | *Notoedres cati*, *Otodectes* | Direct contact | Temporary itchy rash | Everyone | Treating the animal is sufficient |
| Sporotrichosis | *Sporothrix* spp. | Contact with lesions on the cat (an important cat-to-human route in some regions) | Skin nodules, lymphocutaneous lesions | People caring for affected cats | Geographic distribution: the AVMA cites a CDC alert, "first identified in Brazil during the 1980s. Since then, human and feline cases of CTS have been reported across Brazil and in neighboring Chile and Argentina", and from 2023 the United Kingdom saw its first imported cases (<https://www.avma.org/news/cdc-issues-warning-about-spread-cat-transmitted-sporotrichosis>, verified 2026-07-30); no percentage prevalence figure could be found that can be quoted verbatim 【No single authoritative value for this item: whitelisted sources do not provide a cat-specific reference value for sporotrichosis prevalence】; wear gloves when handling a cat with skin lesions |
| Cohabitation transmission of resistant bacteria | MRSA / MRSP and others | Close contact | Wound infections that are hard to treat | People with healthcare exposure, the immunocompromised | Antibiotics only under veterinary prescription; do not keep leftover medication and continue it yourself |
General principle for the immunocompromised, pregnant women, young children and the elderly: keeping a cat is not itself contraindicated. Flea control plus daily litter scooping plus no raw diet plus handwashing plus indoor housing already brings most of the risk down very low. Specific medical advice should be discussed jointly with a physician and a veterinarian (the name and version of the public-health guidance 【No single authoritative value for this item: whitelisted sources do not provide a cat-specific reference value for the name and version of public-health guidance】).
The content above is copied cell by cell from the encyclopaedia chapter text, without rewriting or condensing; treatment direction is given only by category, with no drug names or dosages, and medication must be prescribed by a veterinarian.
The limits of this content
The content of this article comes from the cat chapter of the veterinary encyclopaedia (the original location and content hash are given in the evidence chain). The sources at the end are the authoritative material cited by that chapter, a chapter-level correspondence. This is educational information and cannot replace the diagnosis and prescription of a practising veterinarian; in an emergency, seek care immediately. This article has not been clinically reviewed by a named veterinarian.
FAQ
- What should be noted about rabies in cats?
- Lyssavirus | Bites, scratches, mucous-membrane contact with saliva | Neurological signs; once clinical, almost no possibility of treatment | Everyone | Vaccination and management according to local regulation; seek medical care immediately after a bite from an unknown animal (handled on the human-medicine side, outside the scope of this file)。
- 猫の狂犬病 rabies で注意すべきことは何ですか? — Lyssavirus | 咬傷、掻傷、唾液の粘膜接触 | 神経症状。発症後はほぼ救命の見込みがありません | 全員 | 地域の法規に従った接種と管理。素性の分からない動物にかまれたら直ちに受診(ヒト医療側の処置であり、本ファイルの範囲外)。実際の判断は獣医師が個別の症例に応じて行う必要があり、本記事は薬剤名と用量を記載しません。
- What should be noted about rabies in cats? — Lyssavirus | Bites, scratches, mucous-membrane contact with saliva | Neurological signs; once clinical, almost no possibility of treatment | Everyone | Vaccination and management according to local regulation; seek medical care immediately after a bite from an unknown animal (handled on the human-medicine side, outside the scope of this file)。
- What should be noted about cat-scratch disease in cats?
- *Bartonella henselae* | Flea → cat → human (scratches, bites, wound contact with claw contamination) | Local pustule, lymph-node swelling, fever | Immunocompromised people can develop systemic severe disease | Flea control is the core; trim claws; do not use hands to provoke biting play; wash wounds immediately。
- 猫の猫ひっかき病 cat-scratch disease で注意すべきことは何ですか? — *Bartonella henselae* | ノミ→猫→ヒト(引っかき、かみつき、爪の汚染が傷口に接触) | 局所の膿疱、リンパ節腫脹、発熱 | 免疫低下者では全身性の重症になりえます | ノミ対策が中核。爪を切る。手で咬みつき遊びを誘わない。傷は直ちに洗浄。実際の判断は獣医師が個別の症例に応じて行う必要があり、本記事は薬剤名と用量を記載しません。
- What should be noted about cat-scratch disease in cats? — *Bartonella henselae* | Flea → cat → human (scratches, bites, wound contact with claw contamination) | Local pustule, lymph-node swelling, fever | Immunocompromised people can develop systemic severe disease | Flea control is the core; trim claws; do not use hands to provoke biting play; wash wounds immediately。
- What should be noted about Toxoplasmosis in cats?
- *Toxoplasma gondii* | Oocysts in cat faeces (they need a period of time after being shed before becoming infective, AVMA: "After about 1 to 5 days in the environment, these oocysts become infective" <https://www.avma.org/resources-tools/pet-owners/petcare/toxoplasmosis>, verified 2026-07-30, hence the advice to scoop daily); in humans it more often comes from undercooked meat and contaminated raw vegetables | Mostly asymptomatic; a first infection during pregnancy can cause congenital infection; brain lesions in the immunocompromised。
- 猫のトキソプラズマ症 toxoplasmosis で注意すべきことは何ですか? — *Toxoplasma gondii* | 猫の糞便中のオーシスト(排出後、感染力を持つまでに一定の時間が必要、AVMA:「After about 1 to 5 days in the environment, these oocysts become infective」<https://www.avma.org/resources-tools/pet-owners/petcare/toxoplasmosis>、確認 2026-07-30。したがって毎日のトイレ清掃が推奨されます)。ヒトではむしろ加熱不十分な肉や汚染された生野菜からの感染が多いです | 大半は無症状。妊娠中の初感染は先天感染を起こしえます。免疫低下者では脳病変 | 妊婦、免疫低下者 | 妊婦が猫を手放す必要はありません:トイレは毎日清掃(できれば他の人に代わってもらう)、手袋を着用、清掃後は手を洗う、猫に生肉を与えない、放し飼いで狩りをさせない、トイレを台所に置かない。実際の判断は獣医師が個別の症例に応じて行う必要があり、本記事は薬剤名と用量を記載しません。
- What should be noted about Toxoplasmosis in cats? — *Toxoplasma gondii* | Oocysts in cat faeces (they need a period of time after being shed before becoming infective, AVMA: "After about 1 to 5 days in the environment, these oocysts become infective" <https://www.avma.org/resources-tools/pet-owners/petcare/toxoplasmosis>, verified 2026-07-30, hence the advice to scoop daily); in humans it more often comes from undercooked meat and contaminated raw vegetables | Mostly asymptomatic; a first infection during pregnancy can cause congenital infection; brain lesions in the immunocompromised。
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Cite this article
Jane・《Cats | Zoonoses》・IDAEO 知識庫・2026-08-13・https://km.idaeo.ai/post/vet/cat-zoonosesUpdated 2026-08-15