Study On Molecular Diagnosis Of Canine Distemper Virus
By: Muhammad Zubair Shabbir
| Prof.Dr.Masood Rabbani.
Contributor(s): Prof.Dr.Khushi Muhammad | Prof.dr.Zafar | Faculty of Veterinary Sciences.
Material type: 
BookPublisher: 2008Subject(s): Department of MicrobiologyDDC classification: 1034,T Dissertation note: Samples from fourty five dogs were submitted to the University diagnostic Laboratory, University of Veterinary and Animal Sciences, Lahore from January, 2007 to January 2008 for diagnosis of CDV infection. These dogs presented to referring veterinarians with clinical signs suspicious of CDV infection. Hematological examination (lymphocyte count) was carried out using K-EDTA anti-coagulant added whole blood and RT-PCR tests were performed using biological fluid samples that include plasma, nasal and conjunctival swabs. Only distemper positive dogs by RT-PCR were followed up for subsequent lymphocyte count and prognosis of distemper infection.
All the distemper positive dogs were lymphopenic but the degree of severity was variable as the samples were collected from dogs of different ages and phase of the disease. The study revealed that lymphopenia can be used to support presumptive clinical diagnosis but required laboratory procedure for confirmation and animal regain its normal value with the passage of time subjected to recovery. During followed up, two dogs were found to be dead because of CDV infection mixed with secondary bacterial infection in which one exhibited the nervous sign like teeth grinding, ataxia, convulsions and in coordination in body movements.
Only ten (22.22%) samples were found positive by RT-PCR using plasma, nasal and conjunctival swabs. CDV RNA was detected in 60% of plasma samples, 70% of nasal and 100% of conjunctival swab sample from lymphopenic dogs whereas the percentage was 13.33, 15,55, and 22.22 from a total of 45 samples. No amplicon of expected length was obtained from normal healthy dogs. On comparison of different fluid samples, the sensitivity of conjunctival swab was found to be highly significant followed by nasal swab and plasma.
In conclusion, Lymphopenia is the suggestive of clinical infection of dogs with canine distemper virus ad can help in presumptive diagnosis. It is not necessary that all lymphopenic dogs are distemper posit it requires further laboratory confirmtion. In this context, RT-PCR is test of choice with samples including conjunctival swabs and plasma.
| Item type | Current location | Collection | Call number | Status | Date due | Barcode | Item holds |
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Thesis
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UVAS Library Thesis Section | Veterinary Science | 1034,T (Browse shelf) | Available | 1034,T |
Samples from fourty five dogs were submitted to the University diagnostic Laboratory, University of Veterinary and Animal Sciences, Lahore from January, 2007 to January 2008 for diagnosis of CDV infection. These dogs presented to referring veterinarians with clinical signs suspicious of CDV infection. Hematological examination (lymphocyte count) was carried out using K-EDTA anti-coagulant added whole blood and RT-PCR tests were performed using biological fluid samples that include plasma, nasal and conjunctival swabs. Only distemper positive dogs by RT-PCR were followed up for subsequent lymphocyte count and prognosis of distemper infection.
All the distemper positive dogs were lymphopenic but the degree of severity was variable as the samples were collected from dogs of different ages and phase of the disease. The study revealed that lymphopenia can be used to support presumptive clinical diagnosis but required laboratory procedure for confirmation and animal regain its normal value with the passage of time subjected to recovery. During followed up, two dogs were found to be dead because of CDV infection mixed with secondary bacterial infection in which one exhibited the nervous sign like teeth grinding, ataxia, convulsions and in coordination in body movements.
Only ten (22.22%) samples were found positive by RT-PCR using plasma, nasal and conjunctival swabs. CDV RNA was detected in 60% of plasma samples, 70% of nasal and 100% of conjunctival swab sample from lymphopenic dogs whereas the percentage was 13.33, 15,55, and 22.22 from a total of 45 samples. No amplicon of expected length was obtained from normal healthy dogs. On comparison of different fluid samples, the sensitivity of conjunctival swab was found to be highly significant followed by nasal swab and plasma.
In conclusion, Lymphopenia is the suggestive of clinical infection of dogs with canine distemper virus ad can help in presumptive diagnosis. It is not necessary that all lymphopenic dogs are distemper posit it requires further laboratory confirmtion. In this context, RT-PCR is test of choice with samples including conjunctival swabs and plasma.
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