Effects of Phenobarbital and Prednisolone on Neurological Signs of Canine Distemper

ABSTRACT Background Canine distemper virus (CDV) is a highly infectious and often fatal disease in dogs, affecting various systems. Despite vaccination efforts, cases of distemper, especially the neurological form, remain a global concern due to its high fatality rate. Objective To investigate the e...

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Main Authors: Ali Asghar Sarchahi, Mohammad Arbabi, Hadi Mohebalian
Format: Article
Language:English
Published: Wiley 2025-09-01
Series:Veterinary Medicine and Science
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Online Access:https://doi.org/10.1002/vms3.70479
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author Ali Asghar Sarchahi
Mohammad Arbabi
Hadi Mohebalian
author_facet Ali Asghar Sarchahi
Mohammad Arbabi
Hadi Mohebalian
author_sort Ali Asghar Sarchahi
collection DOAJ
description ABSTRACT Background Canine distemper virus (CDV) is a highly infectious and often fatal disease in dogs, affecting various systems. Despite vaccination efforts, cases of distemper, especially the neurological form, remain a global concern due to its high fatality rate. Objective To investigate the effectiveness of phenobarbital and prednisolone in treating the neurological form of canine distemper (CD). Methods Thirty‐five dogs with neurological signs of CD were included in the study after careful clinical examination. Confirmation of CD was based on clinical signs, rapid diagnostic tests, and RT‐PCR testing of blood and/or cerebrospinal fluid (CSF). Dogs were treated with oral phenobarbital (2.5 mg/kg) and prednisolone (0.55 mg/kg) every 12 h. Treatment outcomes were categorised as recovered, died, or euthanised. Results Out of the 35 dogs, 25 tested positive for CDV. Among positive cases (n = 25), two dogs mostly recovered, one dog partially recovered, one dog remained unchanged, 18 died (15 died naturally and three were euthanised), and three dogs were lost to follow‐up. In the negative test group (10 dogs), eight dogs died, the outcome of one dog was unknown and one dog remained unchanged. Disease duration ranged from 2 to 586 days (average: 72 days in positive cases, 59.2 days in negative cases). The low recovery rate (8%) suggests limited effectiveness of the treatments used, including prednisolone, particularly for myoclonus, which was the most frequent clinical sign. Regarding seizure management, while our study observed some effectiveness of phenobarbital in controlling seizures, it's important to note that the efficacy of phenobarbital can vary. Limitations Small sample size and owner non‐compliance limited the study. Conclusions Our findings suggest limited benefit from prednisolone for neurological CD. Further research is necessary to develop more effective treatment strategies for this devastating canine viral disease.
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spelling doaj-art-3ed7ee6c65ef4feb9d9a5b98cf22a42c2025-08-20T14:41:15ZengWileyVeterinary Medicine and Science2053-10952025-09-01115n/an/a10.1002/vms3.70479Effects of Phenobarbital and Prednisolone on Neurological Signs of Canine DistemperAli Asghar Sarchahi0Mohammad Arbabi1Hadi Mohebalian2Department of Clinical Sciences Faculty of Veterinary Medicine Ferdowsi University of Mashhad Mashhad IranGraduated from Faculty of Veterinary Medicine Ferdowsi University of Mashhad Mashhad IranDepartment of Pathobiology Faculty of Veterinary Medicine Ferdowsi University of Mashhad Mashhad IranABSTRACT Background Canine distemper virus (CDV) is a highly infectious and often fatal disease in dogs, affecting various systems. Despite vaccination efforts, cases of distemper, especially the neurological form, remain a global concern due to its high fatality rate. Objective To investigate the effectiveness of phenobarbital and prednisolone in treating the neurological form of canine distemper (CD). Methods Thirty‐five dogs with neurological signs of CD were included in the study after careful clinical examination. Confirmation of CD was based on clinical signs, rapid diagnostic tests, and RT‐PCR testing of blood and/or cerebrospinal fluid (CSF). Dogs were treated with oral phenobarbital (2.5 mg/kg) and prednisolone (0.55 mg/kg) every 12 h. Treatment outcomes were categorised as recovered, died, or euthanised. Results Out of the 35 dogs, 25 tested positive for CDV. Among positive cases (n = 25), two dogs mostly recovered, one dog partially recovered, one dog remained unchanged, 18 died (15 died naturally and three were euthanised), and three dogs were lost to follow‐up. In the negative test group (10 dogs), eight dogs died, the outcome of one dog was unknown and one dog remained unchanged. Disease duration ranged from 2 to 586 days (average: 72 days in positive cases, 59.2 days in negative cases). The low recovery rate (8%) suggests limited effectiveness of the treatments used, including prednisolone, particularly for myoclonus, which was the most frequent clinical sign. Regarding seizure management, while our study observed some effectiveness of phenobarbital in controlling seizures, it's important to note that the efficacy of phenobarbital can vary. Limitations Small sample size and owner non‐compliance limited the study. Conclusions Our findings suggest limited benefit from prednisolone for neurological CD. Further research is necessary to develop more effective treatment strategies for this devastating canine viral disease.https://doi.org/10.1002/vms3.70479canine distemper virusdogneurological distemperphenobarbitalprednisolone
spellingShingle Ali Asghar Sarchahi
Mohammad Arbabi
Hadi Mohebalian
Effects of Phenobarbital and Prednisolone on Neurological Signs of Canine Distemper
Veterinary Medicine and Science
canine distemper virus
dog
neurological distemper
phenobarbital
prednisolone
title Effects of Phenobarbital and Prednisolone on Neurological Signs of Canine Distemper
title_full Effects of Phenobarbital and Prednisolone on Neurological Signs of Canine Distemper
title_fullStr Effects of Phenobarbital and Prednisolone on Neurological Signs of Canine Distemper
title_full_unstemmed Effects of Phenobarbital and Prednisolone on Neurological Signs of Canine Distemper
title_short Effects of Phenobarbital and Prednisolone on Neurological Signs of Canine Distemper
title_sort effects of phenobarbital and prednisolone on neurological signs of canine distemper
topic canine distemper virus
dog
neurological distemper
phenobarbital
prednisolone
url https://doi.org/10.1002/vms3.70479
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AT hadimohebalian effectsofphenobarbitalandprednisoloneonneurologicalsignsofcaninedistemper