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582   PART 9   CAT WITH SIGNS OF GASTROINTESTINAL TRACT DISEASE



           DISEASES CAUSING SALIVATION                  PERIDONTAL DISEASE/PERIODONTITIS***

                                                         Classical signs
          PSYCHOGENIC CAUSES***
                                                         ● Dysphagia.
           Classical signs                               ● Pawing at mouth.
                                                         ● Halitosis.
           ● Ptyalism.
                                                         ● Ptyalism.
           ● Dilated pupils.
                                                        See main reference on page 604 for details (The Cat
                                                        With Bad Breath or Oral Lesions).
          Pathogenesis

          Fear, anxiety, pleasure, nausea.              Clinical signs
          May be exacerbated by underlying or concomitant  Severe peridontal disease will result in tooth loss, deep
          hyperthyroidism.                              pockets with heavy anaerobic infections and strong hal-
                                                        itosis.
          Anticipation of unpleasant experience (e.g. tableting or
          painful injection).                           Cat may show signs of attempting to pick up food,
                                                        dropping it and pawing at mouth.
          Especially in “highly-strung” cats, e.g. Siamese.
                                                        Peri-labial fur may be saliva stained.
          Makes oral medication virtually impossible.
                                                        Feline odontoclastic resorptive lesions (“neck lesions”)
          Probably the most common cause of ptyalism in the cat
                                                        can also be very painful and show similar signs.
          in the clinic situation.

                                                        Diagnosis
          Clinical signs                                Probing to identify periodontal pockets. Tapping affected
                                                        teeth will cause jaw “chattering”.
          Drooling, ptyalism.
          Usually during traveling or at veterinary clinic.
          Often triggered by cat recognizing unpleasant event  FELINE CALICIVIRUS**
          to come.
                                                         Classical signs
          Pupils dilated when due to stress or fear.
                                                         ● Sneezing, coughing, oculonasal discharge.
          Repeated lip smacking and swallowing           ● Oral ulceration, especially tongue.
                                                         ● Ptyalism.

                                                        See main reference on page 11 for details.
          Treatment

          0.01 mg/kg PO or SC atropine 1/2 hour before traveling/-
          event.                                        Clinical signs
          Diazepam 0.5 mg/kg PO or SC 1/2 hour before traveling/-  Sudden onset of acute conjunctivitis (usually one eye
          event.                                        first).
          Above drugs can be combined.                  Rapidly followed by sneezing, coughing, pyrexia.
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