The suspicion of a FCV-VSD was quite delayed. the present outbreak were: (1) the extreme flare-up of lesions at sites of skin breach, precluding any puncture/incision; (2) the suggested better survival rate at home than in hospital; and (3) the immediate control of the outbreak after recognition from the disease. Other striking but less uncommon features of this outbreak were: (4) the increasing from the virulence from the calicivirus with the passage of time; and (5) the primary role that the caregivers hands played in the propagate of the outbreak. == Intro == At the start of October 2011, a month after the starting of classes, an abnormally large morbidity and mortality event was noted in the intensive treatment unit (ICU) of a veterinary school hospital. Cats, GSK3368715 dihydrochloride and cats only, transferred from the GSK3368715 dihydrochloride emergency room (ER) presented with fever and cutaneous lesions around GSK3368715 dihydrochloride venepuncture or surgical incision sites. These clinical signs PR52 were apparently unrelated to the cause of hospitalisation. At first, no common link was apparent between these cases. Ulcers on the tongue were noticed, and attributed to a classical calicivirus. By Friday 7 October a nosocomial contamination was suspected and a census of suspected GSK3368715 dihydrochloride cases was undertaken. On Sunday 9 October lingual ulcerations and very severe generalised signs in a kitty that had spent 2 days in the ICU led to the hypothesis of a feline calicivirus-associated virulent systemic disease (FCV-VSD), a hypothesis that was subsequently confirmed. That evening (9 October 2011) hospital personnel were alerted to the situation by email, and invited to attend an informational conference the next morning, Monday 10 October. The decision was made to close the hospital to cats intended for 48 h; dogs were still admitted for appointments. The ER and ICU were closed to all patients, dogs included, for 5 days, to allow for disinfection from the premises and supplies. The hospital was closed to the staff of the laboratory catteries. Hospitalised cats were transferred to a building located 500 m away from the hospital, outside of the schools enclosure, separated by a street; it accepted neither animals nor personnel from the hospital. This building was specifically designed to treat infectious diseases. A staffed telephone line in the ER was operated, to inform clients of the closure, and direct sick animals that had recently been in the hospital to the quarantine facility. Owners of hospitalised cats were notified. All owners of cats that been in the ER or the ICU from 1 September 2011 onwards were contacted by telephone, to question them about their cats wellness. The veterinarians of the region were notified by email. Biosecurity measures were put in place in the hospital: bleach footbaths, mandatory booties, scrub caps and gloves, disinfection from the hands with an alcohol-based solution (even if gloves had been worn), use of disposable gloves and clothes, and so on. Surfaces and supplies were cleaned with an industrial detergent and disinfectant (Surfanios; Laboratoires ANIOS), then disinfected with bleach, then with fumigation (Nocolyse; Oxypharm). To allow for better cleaning, cages were disassembled. Consumables like anaesthesia tubing, pill guns and tourniquets were discarded. All rooms were sprayed down. These procedures were carried out throughout the entire small pet hospital, even though only three services received infected cats. The ER is located in a separate building located at the entrance to the veterinary school, 200 m away from the rest of the hospital; it receives practically no animals from the other services. The ICU is located at the end of the hospital building; animals from all the services are hospitalised there, but normally an animal hospitalised in the ICU does not return to the original support. On Friday 7 October 2011, the charts of all the cats presented to the ER or hospitalised in the ICU since the starting of classes on 1 September 2011 were re-examined. On Monday 10 October, 10 cats GSK3368715 dihydrochloride were suspected of being infected with a FCV-VSD; we later on added 4 cats diagnosed after that date (Table 1). == Table 1 . == Summary of 14 cats involved in feline calicivirus-associated virulent systemic disease in Nantes, France.