A rapid method for the direct identification of paramyxovirus in canine CSF by ultracentrifugation and negative staining as a rule out for distemper

1990 ◽  
Vol 48 (3) ◽  
pp. 594-595
Author(s):  
W.L. Steffens ◽  
M.B. Ard ◽  
C.E. Greene ◽  
A. Jaggy
Keyword(s):  
Subacute Sclerosing Panencephalitis ◽  
Clinical Signs ◽  
Viral Disease ◽  
Etiologic Agent ◽  
Mucosal Inflammation ◽  
Worldwide Distribution ◽  
Negative Stain ◽  
Viral Particles ◽  
Systemic Manifestations ◽  
Rule Out

Canine distemper is a multisystemic contagious viral disease having a worldwide distribution, a high mortality rate, and significant central neurologic system (CNS) complications. In its systemic manifestations, it is often presumptively diagnosed on the basis of clinical signs and history. Few definitive antemortem diagnostic tests exist, and most are limited to the detection of viral antigen by immunofluorescence techniques on tissues or cytologic specimens or high immunoglobulin levels in CSF (cerebrospinal fluid). Diagnosis of CNS distemper is often unreliable due to the relatively low cell count in CSF (<50 cells/μl) and the binding of blocking immunoglobulins in CSF to cell surfaces. A more reliable and definitive test might be possible utilizing direct morphologic detection of the etiologic agent. Distemper is the canine equivalent of human measles, in that both involve a closely related member of the Paramyxoviridae, both produce mucosal inflammation, and may produce CNS complications. In humans, diagnosis of measles-induced subacute sclerosing panencephalitis is through negative stain identification of whole or incomplete viral particles in patient CSF.

scholarly journals Description of an as Yet Unclassified DNA Virus from Diseased Cyprinus carpio Species

2005 ◽  
Vol 79 (4) ◽  
pp. 1983-1991 ◽  
Author(s):  
Marina Hutoran ◽  
Ariel Ronen ◽  
Ayana Perelberg ◽  
Maya Ilouze ◽  
Arnon Dishon ◽  
...  
Keyword(s):  
Common Carp ◽  
Cyprinus Carpio ◽  
Secondary Infection ◽  
Clinical Signs ◽  
Viral Disease ◽  
Infected Fish ◽  
Etiologic Agent ◽  
Amino Acid Sequences ◽  
Virus Species ◽  
Enveloped Virus

ABSTRACT Numerous deaths of koi and common carp (Cyprinus carpio) were observed on many farms throughout Israel, resulting in severe financial losses. The lethal viral disease observed is highly contagious and extremely virulent, but morbidity and mortality are restricted to koi and common carp populations. Diseased fish exhibit fatigue and gasping movements in shallow water. Infected fish had interstitial nephritis and gill necrosis as well as petechial hemorrhages in the liver and other symptoms that were not consistent with viral disease, suggesting a secondary infection. Here we report the isolation of carp nephritis and gill necrosis virus (CNGV), which is the etiologic agent of this disease. The virus propagates and induces severe cytopathic effects by 5 days postinfection in fresh koi or carp fin cell cultures (KFC and CFC, respectively), but not in epithelioma papillosum cyprini cells. The virus harvested from KFC cultures induced the same clinical signs, with a mortality of 75 to 95%, upon inoculation into naive koi and common carp. Using PCR, we provide final proof that the isolated virus is indeed the etiologic agent of food and ornamental carp mortalities in fish husbandry. Electron microscopy revealed viral cores with icosahedral morphology of 100 to 110 nm that resembled herpesviruses. Electron micrographs of purified pelleted CNGV sections, together with viral sensitivities to ether and Triton X-100, suggested that it is an enveloped virus. However, the genome of the isolated virus is a double-stranded DNA (dsDNA) molecule of 270 to 290 kbp, which is larger than known herpesviruses. The viral DNA seems highly divergent and bears only small fragments (16 to 45 bp) that are similar to the genomes of several DNA viruses. Nevertheless, amino acid sequences encoded by CNGV DNA fragments bear similarities primarily to members of the Poxviridae and Herpesviridae and to other large dsDNA viruses. We suggest, therefore, that the etiologic agent of this disease may represent an as yet unclassified virus species that is endemic in C. carpio (carp).

scholarly journals The perception, beliefs and practices toward genitourinary schistosomiasis by inhabitants of selected endemic areas (Edo/Delta States) in south-eastern Nigeria

2004 ◽  
Vol 46 (4) ◽  
pp. 209-216 ◽  
Author(s):  
Nnamdi Callistus D. Ukwandu ◽  
O. P. G. Nmorsi
Keyword(s):  
Clinical Signs ◽  
Etiologic Agent ◽  
Laboratory Analysis ◽  
Natural Phenomenon ◽  
Beliefs And Practices ◽  
South Eastern ◽  
Endemic Areas ◽  
Local Languages ◽  
Structured Questionnaire

Well-structured questionnaire on the perception, impression and response to genitourinary bilharziasis (Genitourinary schistosomiasis) was administered and explained in local languages: 'Igbo' 'Esan' 'Ezon' Itshekiri and Bini to 33815 inhabitants of selected endemic areas in south-eastern Nigeria from January, 1999 to December, 2001. Out of this number, 3815 (11.3%) were properly filled and returned. About 42.0% of the inhabitants admitted knowledge of the disease, while 14 (0.4%) knew about the aetiologic agent. About 181 (5.0%) who responded, admitted procuring treatment, while 100 (5.0%) declined to seek treatment of any sort. The relationships between water-bodies and human activities, and infection were well discussed. Amongst those who admitted knowledge of the disease but no knowledge of its etiologic agent, declined seeking treatment of any kind, but believe the disease is a natural phenomenon in ones developmental stage and therefore of no morbidity and mortality. Laboratory analysis of urine, faeces, semen and HVS was employed to assess questionnaire responses, and in some cases, physical examination was utilized to augment laboratory analysis in confirming urinal diagnosis. Haematuria was only directly related to egg count in the early part of life. Females were significantly haematuric and excreted more ova than males (p < 0.05). Headache (43.0%) and fever (31.0%) were major clinical signs while sexual pains (22.0%) were the least.

scholarly journals 29 Cryptococcal Meningitis Leading to Fatal Outcomes in Immunocompetent Patients: A Case Study and Review of Literature

CNS Spectrums ◽  
2019 ◽  
Vol 24 (1) ◽  
pp. 190-190
Author(s):  
Cristhian Felipe Ramirez-Ramos ◽  
Diego Salinas-Cortes ◽  
Juan Diego Rivera-Marin ◽  
Maria Peralta-Agudelo ◽  
Freddy Escobar-Montealegre
Keyword(s):  
Cryptococcal Meningitis ◽  
Clinical Course ◽  
Etiologic Agent ◽  
University Hospital ◽  
Glucocorticoid Treatment ◽  
Therapeutic Implications ◽  
Worldwide Distribution ◽  
Immunological Mechanisms ◽  
Immunocompetent Patients

AbstractIntroductionCryptococcal Meningitis is a fungal infectious disease of worldwide distribution, primarily associated with underlying immunosuppression conditions such as HIV infection, glucocorticoid treatment, status post organ transplantation and oncological treatments. Prevalence is particularly high in third-world countries where it constitutes one of the primary causes of central nervous system infections and may carry fatal outcomes. We present two cases of Cryptococcal Meningitis that portray the vast spectrum of clinical presentations associated with Cryptococcal Meningitis as well as relevant diagnostic and therapeutic implications.MethodsCase study - These adult otherwise healthy patients presented at a public urban university hospital in southern Colombia. Both had an unusual clinical course and suffered fatal outcomes despite being seemingly immunocompetent at baseline. A diagnosis of hepatic cirrhosis could have been considered a cause of immunosuppression in one of the patients and the diagnostic work-up for the other patient revealed no evidence of immunological deficiency.DiscussionCryptococcal Meningitis affecting immunocompetent individuals has been increasingly reported in recent years. Furthermore, outcomes in this population are particularly worse than those generally affected by the disease. A review of the literature related to the possible immunological mechanisms’ underlying the presented clinical course is included. We emphasize the importance of considering Cryptococcus spp. as a possible etiologic agent among differential diagnoses upon encountering suggestive meningeal conditions in immunocompetent patients.Key words: Cryptococcus neoformans, Meningitis, ImmunocompetentFunding: None.

scholarly journals Hemato-Biochemical studies on Egyptian Buffaloes and Calves naturally infected with Foot and Mouth Disease Virus serotype SAT 2

2016 ◽  
Vol 73 (2) ◽  
pp. 230
Author(s):  
Essam A Mahmoud ◽  
Ahmed N.F Neamat-allah
Keyword(s):  
Clinical Signs ◽  
Foot And Mouth Disease ◽  
Viral Disease ◽  
Mouth Disease ◽  
Cardiac Markers ◽  
Mouth Disease Virus ◽  
Virus Serotype ◽  
Foot And Mouth ◽  
Infected Adult ◽  
Apparently Healthy

Foot and mouth disease (FMD) is a highly contagious viral disease of all cloven footed domestic and wild animals. This work was planned to study the different markers for diagnosis of FMDV serotype Sat2 in adult buffaloes and calves including clinical, hematological and biochemical examinations. A total number of sixty animals were divided into four groups. The first group was apparently healthy adult buffaloes, while the second was naturally infected adult buffaloes, a third group was apparently healthy suckling calves and finally the fourth group was naturally infected suckling calves. The recorded clinical signs were fever, salivation, loss of appetite, depression, lameness, blisters or vesicles, erosions and ulcers in the mucosa of the mouth, tongue, lips, gums, pharynx, palate and between the claws. Anemia, leucopenia, lymphopenia and monocytopenia were recorded in infected adult buffaloes and calves. Myocardial injury proved by presence of degenerated myocardial fibers and lymphocyte cell infiltration with a significant increase in cardiac markers like cardiac torponin I, CPK and LDH in addition to a significant hyperkalemia, hypocalcaemia and hypomagnesemia in buffaloe calves. Moreover, electrophoresis showed hyoproteinemia, hypoalbuminemia and hypoglobulinemia in infected animals. It could be concluded that the elevation of cardiac markers emphasized that FMD is more severe in young calves than adult animals. Therefore, it is recommended to evaluate the prognosis of FMD infection in calves by these markers.

scholarly journals Psittacid herpesvirus 3 infection in rose-ringed parakeets in southern Brazil

2020 ◽  
Vol 32 (3) ◽  
pp. 409-412
Author(s):  
Laurete Murer ◽  
Marília B. Ribeiro ◽  
Glaucia D. Kommers ◽  
Mauro P. Soares ◽  
Juliana F. Cargnelutti ◽  
...  
Keyword(s):  
Inclusion Bodies ◽  
Gene Sequence ◽  
Clinical Signs ◽  
Southern Brazil ◽  
Polymerase Gene ◽  
Intranuclear Inclusion ◽  
Breeding Colony ◽  
Psittacula Krameri ◽  
Viral Particles ◽  
Total Dna

We diagnosed disease caused by psittacid herpesvirus 3 (PsHV-3), a novel psittacid pathogen, in rose-ringed parakeets ( Psittacula krameri) housed in an exotic psittacine breeding colony in southern Brazil. The disease affected several adult birds. Clinical signs included apathy, tachypnea, and wheezing. Four birds were autopsied, and sections of lungs and liver were examined histologically and by electron microscopy (EM), revealing pulmonary congestion, bronchopneumonia, or multifocal necrosis of tertiary bronchi, with syncytial cells and eosinophilic intranuclear inclusion bodies. Viral particles morphologically compatible with herpesviruses were observed by EM in lung sections. PCR with pan-herpesvirus primers performed on total DNA extracted from paraffinized tissue resulted in a 278-bp product. Sequencing of the amplicon revealed 93% nucleotide identity with a PsHV-3 sequence available in GenBank. Phylogenetic analysis grouped the obtained sequence with the only PsHV-3 DNA polymerase gene sequence available (GenBank accession JX028240) and separated the sequence from psittacid herpesviruses 1 and 2. The clinical, pathologic, and molecular findings support the association of PsHV-3 with pneumonia found in these rose-ringed parakeets in southern Brazil.

scholarly journals Beak and feather disease virus haemagglutinating activity using erythrocytes from African Grey parrots and Brown-headed parrots : research communication

2005 ◽  
Vol 72 (3) ◽  
Author(s):  
K. Kondiah ◽  
J. Albertyn ◽  
R.R. Bragg
Keyword(s):  
South Africa ◽  
Disease Virus ◽  
Causative Agent ◽  
Haemagglutination Inhibition ◽  
Clinical Signs ◽  
Viral Disease ◽  
Dna Virus ◽  
Haemagglutinating Activity ◽  
Feather Disease Virus ◽  
Positive Results

Psittacine beak and feather disease (PBFD) is a common viral disease of wild and captive psittacine birds characterized by symmetric feather loss and beak deformities. The causative agent, beak and feather disease virus (BFDV), is a small, circular single-stranded DNA virus that belongs to the genus Circovirus. BFDV can be detected by PCR or the use of haemagglutination (HA) and haemagglutination inhibition (HI) assays that detect antigen and antibodies respectively. Erythrocytes from a limited number of psittacine species of Australian origin can be used in these tests. In South Africa, the high cost of these birds makes them difficult to obtain for experimental purposes. Investigation into the use of erythrocytes from African Grey parrots and Brown-headed parrots yielded positive results showing the haemagglutinating activity of their erythrocytes with purified BFDV obtained from confirmed clinical cases of the disease. The HA activity was further confirmed by the demonstration of HI using BFDV antiserum from three different African Grey parrots previously exposed to the virus and not showing clinical signs of the disease.

Bovine torovirus (Breda virus) revisited

2004 ◽  
Vol 5 (2) ◽  
pp. 157-171 ◽  
Author(s):  
Armando E. Hoet ◽  
Linda J. Saif
Keyword(s):  
Diarrheal Disease ◽  
Proteolytic Enzymes ◽  
Clinical Signs ◽  
Protein Composition ◽  
Epidemiological Data ◽  
Biological Properties ◽  
Published Data ◽  
Worldwide Distribution ◽  
Zoonotic Viruses ◽  
And Control

AbstractBovine torovirus (BoTV) is a pleomorphic virus with a spike-bearing envelope and a linear, non-segmented, positive-sense single-stranded RNA genome. This kidney-shaped virus is associated with diarrhea in calves and apparently has a worldwide distribution. This review provides details of the history and taxonomy of BoTV since its discovery in 1979. Information about virion morphology and architecture, antigenic and biological properties, viral genome, protein composition, thermal and chemical stability, and pH and proteolytic enzymes resistance is also summarized. A major focus of this review is to postulate a possible epidemiological cycle for BoTV, based on epidemiological data obtained in our studies and other published data, and progressing from the newborn calf to the adult animal. The distribution, host range, pathogenesis, disease and clinical signs (under experimental and natural exposure), pathology, diagnosis, prevention, treatment and control of BoTV infections are also described. In addition, a discussion of the zoonotic implications of torovirus-like particles detected in patients with gastroenteritis that resemble and cross-react with BoTV is presented. Hopefully, the findings described here will alert others to the existence of BoTV in cattle and its contribution to the diarrheal disease complex. This review also highlights the need for continual vigilance for potential zoonotic viruses belonging to the orderNidovirales, such as the SARS coronavirus.

Ultrastructural Evidence for the Viral Etiology of Feline Infectious Peritonitis

1968 ◽  
Vol 5 (1) ◽  
pp. 91-95 ◽  
Author(s):  
B. C. Zook ◽  
N. W. King ◽  
R. L. Robison ◽  
H. L. McCombs
Keyword(s):  
Electron Microscopy ◽  
Endoplasmic Reticulum ◽  
Causative Agent ◽  
Mesothelial Cells ◽  
Etiologic Agent ◽  
Peritoneal Exudate ◽  
Viral Etiology ◽  
Feline Infectious Peritonitis ◽  
Ultrastructural Evidence ◽  
Viral Particles

Filtration studies indicate that the causative agent of feline infectious (fibrinous) peritonitis is less than 200 m μ in smallest dimension. Viral particles 94 m μ in diameter, within and budding into the endoplasmic reticulum of the mesothelial cells in areas of inflammation, were found by electron microscopy and may be the etiologic agent. No bacterium or mycoplasma was cultured from peritoneal exudate, nor identified in affected tissues.

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