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Covert JC, Thomasy SM, Kado-Fong H, Kon LN, Kass PH, Reilly CM, Lappin MR, Margulies BJ, Maggs DJ. Pilot Study of the Safety and Tolerability of a Subconjunctival Penciclovir Implant in Cats Experimentally Infected with Herpesvirus. J Ocul Pharmacol Ther 2019; 35:38-49. [DOI: 10.1089/jop.2018.0043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- Jill C. Covert
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, California
| | - Sara M. Thomasy
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, California
- Veterinary Medical Teaching Hospital, University of California-Davis, Davis, California
| | - Helen Kado-Fong
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, California
| | - Leslie N. Kon
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, California
| | - Philip H. Kass
- Department of Population Health and Reproduction, and University of California-Davis, Davis, California
| | - Christopher M. Reilly
- Department of Pathology Microbiology and Immunology, University of California-Davis, Davis, California
| | - Michael R. Lappin
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Barry J. Margulies
- Towson University Herpes Virus Laboratory, Department of Biological Sciences, Towson University, Towson, Maryland
| | - David J. Maggs
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, California
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2
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Swenson CL, Gardner K, Arnoczky SP. Infectious feline herpesvirus detected in distant bone and tendon following mucosal inoculation of specific pathogen-free cats. Vet Microbiol 2012; 160:484-7. [PMID: 22795772 DOI: 10.1016/j.vetmic.2012.06.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Revised: 06/03/2012] [Accepted: 06/19/2012] [Indexed: 11/19/2022]
Abstract
Emerging evidence suggests that cats infected with feline herpesvirus-1 (FHV-1) may experience a brief viremic phase. The objective of this study was to determine whether natural routes of FHV-1 inoculation could result in viremic transmission of infectious virus to connective tissues (cortical bone, tendon). Three specific pathogen-free cats were experimentally inoculated with FHV-1 via a combined mucosal (oronasal, ocular) route. Cats were euthanized at the peak of clinical signs to aseptically harvest tissues (cortical bone, tendon, trachea/tongue) for co-culture with a susceptible cell line to promote spread of infectious virus. Viral infection of Crandall-Rees feline kidney cells was microscopically visualized by cytopathic effect (CPE). Additionally, co-culture DNA was extracted either at the point of CPE or 16 days of culture without evidence of CPE, to amplify FHV-1 glycoprotein B gene using real-time PCR. Infectious virus was detected in distant cortical bone (two cats, moderate to severe clinical signs) and tendon (one cat, severe clinical signs). Direct infection of mucosal (trachea, tongue) tissues also was confirmed in these two cats. In contrast, all co-cultured tissues from the third cat (mild clinical signs) were negative for FHV-1 by CPE and PCR. Results of this study demonstrated that early primary FHV-1 viremia may be distributed to distant connective tissues.
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Affiliation(s)
- C L Swenson
- Department of Pathobiology and Diagnostic Investigation, Diagnostic Center for Population and Animal Health, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824-1314, USA.
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3
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Bürki F, Lindt S, Freudiger U. Enzootischer, virusbedingter Katzenschnupfen in einem Tierheim. ACTA ACUST UNITED AC 2010. [DOI: 10.1111/j.1439-0450.1964.tb00234.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Montagnaro S, Longo M, Pacilio M, Indovina P, Roberti A, De Martino L, Iovane G, Pagnini U. Feline herpesvirus-1 down-regulates MHC class I expression in an homologous cell system. J Cell Biochem 2009; 106:179-85. [PMID: 19009565 DOI: 10.1002/jcb.21986] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Cytotoxic T lymphocytes (CTLs) are an essential component of the immune defense against many virus infections. CTLs recognize viral peptides in the context of the major histocompatibility complex (MHC) class I molecules on the surface of infected cells. Many viruses have evolved mechanisms to interfere with MHC class I expression as a means of evading the host immune response. In the present research we have studied the effect of in vitro Feline Herpesvirus 1 (FeHV-1) infection on MHC class I expression. The results of this study demonstrate that FeHV-1 down regulates surface expression of MHC class I molecules on infected cells, presumably to evade cytotoxic T-cell recognition and, perhaps, attenuate induction of immunity. Sensitivity to UV irradiation and insensitivity to a viral DNA synthesis inhibitor, like phosphonacetic acid, revealed that immediate early or early viral gene(s) are responsible. Use of the protein translation inhibitor cycloheximide confirmed that an early gene is primarily responsible.
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Affiliation(s)
- S Montagnaro
- Department of Pathology and animal Health, School of Veterinary Medicine, University of Naples Federico II, Via Delpino no 1, 80137 Naples, Italy.
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5
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Hussein ITM, Field HJ. Development of a quantitative real-time TaqMan PCR assay for testing the susceptibility of feline herpesvirus-1 to antiviral compounds. J Virol Methods 2008; 152:85-90. [PMID: 18597862 DOI: 10.1016/j.jviromet.2008.05.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2008] [Revised: 04/15/2008] [Accepted: 05/08/2008] [Indexed: 11/16/2022]
Abstract
Feline herpesvirus-1 (FHV-1) is considered as the most common viral infection of domestic cats worldwide. It causes a disease characterized by upper respiratory and ocular clinical signs. Several attempts are currently underway to develop antiviral chemotherapy for treating FHV-1 infections. The availability of a rapid quantitative method for detecting FHV-1 would greatly facilitate prompt therapy, and hence enhance the success of any antiviral regime. In this study, a TaqMan real-time PCR assay was established for measuring FHV-1 DNA levels in culture supernatants. This assay was shown to be highly specific, reproducible and allows quantitation over a range of 2 to 2 x 10(8) copies per reaction. The assay was then applied to measure the reduction of FHV-1 DNA levels in the presence of increasing concentrations of acyclovir (ACV), penciclovir (PCV) and cidofovir (CDV). The 50% inhibitory concentrations (IC(50s)) obtained with the B927 laboratory strain of FHV-1 were 15.8 microM for ACV, 7.93 microM for CDV and 1.2 microM for PCV. The assay described here is sensitive, time-saving and does not involve prior titration of virus stocks or monitoring virus-induced cytopathic effects. Therefore, it is suitable for routine anti-FHV-1 drug susceptibility testing in veterinary clinics.
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Affiliation(s)
- Islam T M Hussein
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, UK
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6
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Pedersen NC, Sato R, Foley JE, Poland AM. Common virus infections in cats, before and after being placed in shelters, with emphasis on feline enteric coronavirus. J Feline Med Surg 2004; 6:83-8. [PMID: 15123152 PMCID: PMC7128562 DOI: 10.1016/j.jfms.2003.08.008] [Citation(s) in RCA: 127] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2003] [Indexed: 12/02/2022]
Abstract
The purpose of this study was to determine the origin and subsequent spread of feline calicivirus (FCV), feline herpesvirus (FHV), and feline enteric coronavirus (FECV) in cats relinquished to shelters. FCV was isolated from the oral fauces of 11% of healthy cats upon entry, and isolation rates were highest for kittens (33%). FHV shedding was very low (4%) at the time of entry and occurred mainly in juveniles. FECV shedding was also common among newly relinquished cats (33%), especially older kittens and juveniles (90%). The subsequent spread of all three viruses was rapid and efficient in the shelter environment. Fifteen percent of cats were shedding FCV, 52% FHV, and 60% FECV after 1 week. More detailed studies were done with FECV shedding, which could be accurately quantitated. The amounts of FECV shed by infected cats ranged from 102to 1016particles/swab of feces. FECV shedding was several logs higher in young kittens with primary infection than adult cats with primary infections. The mean levels of FECV shedding among adults were the same for primary and chronic infections. Although shelters were not the primary source of these viruses for many relinquished cats, factors intrinsic to the shelter environment were critical in amplifying shedding and spread to susceptible individuals. Extrinsic factors were especially important for the spread of FHV and FECV. FHV shedding rates increased from 4% to 50% in 1 week's time. The speed and magnitude of the increase in FHV shedding suggested that there was reactivation of latent infections as well as acquisition of new infections. FECV shedding increased 10 to 1,000,000 fold in 1 week among cats that were already infected at entry, and more than one-half of initially negative cats were shedding FECV a week later. Feline calicivirus infection was the least likely to spread in the shelter. The infection rate only increased from 11 to 15% in 1 week.
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Affiliation(s)
- N C Pedersen
- Center for Companion Animal Health, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
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7
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Maeda K, Horimoto T, Mikami T. Properties and functions of feline herpesvirus type 1 glycoproteins. J Vet Med Sci 1998; 60:881-8. [PMID: 9764399 DOI: 10.1292/jvms.60.881] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Feline herpesvirus type 1 (FHV-1) is a causative agent of feline viral rhinotracheitis and belongs to the subfamily Alphaherpesvirinae of the family Herpesviridae. Since first isolated in 1958 by Crandell and Maurer, FHV-1 is distributed worldwide and is the most clinically significant agent for respiratory infections in cats. In this review, we describe the recent findings with properties and functions of FHV-1 glycoproteins, especially hemagglutinins.
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Affiliation(s)
- K Maeda
- Department of Veterinary Microbiology, Faculty of Agriculture, Yamaguchi University, Japan
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8
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Ikeda Y, Itagaki S, Tsutsui S, Inoshima Y, Fukasawa M, Tomonaga K, Tohya Y, Maeda K, Mochizuki M, Miyazawa T, Mikami T. Replication of feline syncytial virus in feline T-lymphoblastoid cells and induction of apoptosis in the cells. Microbiol Immunol 1997; 41:431-5. [PMID: 9194043 DOI: 10.1111/j.1348-0421.1997.tb01875.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Feline syncytial virus (FSV) was isolated from feline peripheral blood mononuclear cells of FSV-seropositive cats. When the susceptibility of feline T-lymphocytes to FSV was examined using three strains of FSV, FSV antigens were detected in the FSV-infected T-lymphoblastoid cells. Further, a diversity of biological properties, including replication kinetics and syncytia formation, was noted among the strains, and condensation of chromatin and the fragmentation of cellular DNA were observed in the infected cells. From these data, we conclude that FSV is lymphotropic and can induce apoptosis in the lymphocytes.
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Affiliation(s)
- Y Ikeda
- Department of Veterinary Microbiology, University of Tokyo, Japan
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9
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Beatty JA, Willett BJ, Gault EA, Jarrett O. A longitudinal study of feline immunodeficiency virus-specific cytotoxic T lymphocytes in experimentally infected cats, using antigen-specific induction. J Virol 1996; 70:6199-206. [PMID: 8709246 PMCID: PMC190644 DOI: 10.1128/jvi.70.9.6199-6206.1996] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The evolution of the virus-specific cytotoxic T-lymphocyte response in two cats experimentally infected with feline immunodeficiency virus (FIV) was monitored. Effector cells were derived from peripheral blood lymphocytes during the acute and chronic phases of infection (0 to 21 and 62 to 127 weeks, respectively) and from the spleen and lymph nodes at 127 weeks after infection. Lymphocytes were restimulated in vitro with paraformaldehyde-fixed, autologous lymphoblasts which had been infected with recombinant vaccinia viruses expressing FIV GAG or ENV proteins. Unstimulated lymphocytes were also used as effectors in some assays. 51Cr-labelled autologous skin fibroblasts infected with recombinant vaccinia viruses were used as targets. FIV GAG-specific cytotoxic precursors were detected in restimulated circulating lymphocytes during acute infection in both cats. The onset of this activity was as early as 2 weeks postinfection (p.i.) in one cat. From 62 weeks p.i. neither FIV GAG- nor ENV-specific precursors could be detected in the peripheral blood. However, at 127 weeks p.i., GAG- and ENV-specific cytotoxic precursors were detected in lymphocytes isolated from lymph nodes. The FIV-specific cytotoxic cells were predominantly major histocompatibility complex class I restricted. No cytotoxic activity was detected from unstimulated lymphocytes. These studies demonstrate the use of an assay system for dissecting the FIV-specific cytotoxic cell response and show that precursor cells appear in the circulation very early after infection and prior to a detectable antibody response. Our results also suggest that the persistent high-level circulating antiviral cytotoxic T-lymphocyte responses seen in human immunodeficiency virus-infected humans may not be a feature of FIV infections in cats.
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Affiliation(s)
- J A Beatty
- Department of Veterinary Pathology, University of Glasgow, Bearsden, United Kingdom
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10
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Kawaguchi Y, Maeda K, Tohya Y, Furuya T, Miyazawa T, Horimoto T, Norimine J, Kai C, Mikami T. Replicative difference in early-passage feline brain cells among feline immunodeficiency virus isolates. Arch Virol 1992; 125:347-54. [PMID: 1322657 DOI: 10.1007/bf01309653] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The susceptibility of early-passage feline brain cells and Crandell feline kidney (CRFK) cells to infection with three isolates of feline immunodeficiency virus (FIV) was investigated. The Petaluma strain of FIV could well infect both the feline brain cells and CRFK cells. The KYO-1 strain could well infect the feline brain cells but the replication in CRFK cells was demonstrated only by coculturing fresh feline T-lymphoblastoid cells with the infected cells. On the other hand, the TM1 strain could infect the feline brain cells but not CRFK cells. Moreover, the replicative ability of the TM1 strain in the feline brain cells was much less than the KYO-1 and Petaluma strains. These results indicate that biological differences can be detected among the FIV isolates.
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Affiliation(s)
- Y Kawaguchi
- Department of Veterinary Microbiology, Faculty of Agriculture, University of Tokyo, Japan
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11
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Rideout BA, Moore PF, Pedersen NC. Distribution of MHC class II antigens in feline tissues and peripheral blood. TISSUE ANTIGENS 1990; 36:221-7. [PMID: 1965618 DOI: 10.1111/j.1399-0039.1990.tb01832.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A new monoclonal antibody raised against gradient-purified feline immunodeficiency virus was found to recognize a bimolecular complex, comprising 27-29 kD and 32-35 kD subunits, on feline peripheral blood lymphocytes. Immunoperoxidase staining of feline tissues with this antibody, designated 43.2H2, demonstrated a reactivity pattern similar to that described for MHC II antigens of the dog, horse, and pig, but differed from human and mouse in having staining of T-cell zones in spleen and lymph nodes. Flow cytometric analysis revealed that 42.3H2 reacted with 88.97% +/- 16.00% of feline peripheral blood lymphocytes (n = 20). This high level of reactivity was found to be consistent by repeated sampling over a 4-month period. Two-color flow cytometric analysis was used to determined the reactivity pattern on lymphocyte subsets: 88.92% +/- 7.30% of CD4+ lymphocytes were 42.3H2-positive, while 85.99% +/- 11.46% of CD8+ cells were positive (n = 11 for both). B lymphocytes had the highest reactivity (99.47% +/- 0.45; n = 9) and also had the highest fluorescence intensity. By gating based on light scatter properties, 95.06% +/- 7.35% of monocytes were 42.3H2-reactive (n = 18), while granulocytes were negative.
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Affiliation(s)
- B A Rideout
- Department of Medicine, School of Veterinary Medicine, University of California, Davis
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12
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Weiss RC, Oostrom-Ram T. Inhibitory effects of ribavirin alone or combined with human alpha interferon on feline infectious peritonitis virus replication in vitro. Vet Microbiol 1989; 20:255-65. [PMID: 2549687 PMCID: PMC7117261 DOI: 10.1016/0378-1135(89)90049-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The antiviral activities of ribavirin (1-beta-D-ribofuranosyl-1,2,4-triazole-3-carboxamide; virazole), either alone or in combination with recombinant human leukocyte (alpha) interferon (rHuIFN-alpha), were evaluated against feline infectious peritonitis virus (FIPV) in feline kidney-cell cultures. The 50% inhibitory dose (ID50) of ribavirin for uninfected, rapidly dividing cells was approximately 17 micrograms ml-1 whereas the ID50 for FIPV was 2.5 micrograms ml-1. The therapeutic index (TI) of ribavirin (i.e. the ratio of the minimum cell-toxic dose to minimum virus-inhibitory dose) was 6.8. Although a dose-dependent inhibition of viral infectivity occurred at non-toxic doses, maximum antiviral effects (greater than or equal to 4 log10 reduction in FIPV) occurred at cytotoxic doses. When low or moderate doses of ribavirin were combined with either 10 or 100 U of rHuIFN-alpha ml-1, the resulting antiviral effects were significantly greater than the sum of the observed effects from either ribavirin or rHuIFN-alpha alone. Significant synergistic interactions with rHuIFN-alpha occurred at ribavirin doses of 1, 5, 12.5 and 25 micrograms ml-1. Synergistic combinations of rHuIFN-alpha and ribavirin produced up to an 80-fold or a 200-fold relative increase in FIPV antiviral activities compared with that produced by equivalent doses, respectively, of ribavirin or rHuIFN-alpha alone. In cell growth studies, the addition of either 10 or 100 U of rHuIFN-alpha ml-1 to test doses of ribavirin did not increase the anticellular effect observed with ribavirin alone; seemingly, the potentiation of ribavirin antiviral activity by rHuIFN-alpha was independent of any additive cytotoxic effects. Potentially, synergistic combinations of the two antiviral agents in vivo may decrease the therapeutic dose of ribavirin required for inhibition of FIPV and thus reduce drug toxicity.
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Affiliation(s)
- R C Weiss
- Scott-Ritchey Research Program, College of Veterinary Medicine, Auburn University, AL 36849
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13
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Feline viral rhinotracheitis: sites of virus replication and persistence in acutely and persistently infected cats. Res Vet Sci 1979. [DOI: 10.1016/s0034-5288(18)32823-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Gaskell RM, Wardley RC. Feline viral respiratory disease: a review with particular reference to its epizootiology and control. J Small Anim Pract 1978; 19:1-16. [PMID: 347170 DOI: 10.1111/j.1748-5827.1978.tb05452.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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15
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Abstract
A feline virus isolate previously reported as adenovirus-like has more recently been identified and characterized as a new feline herpesvirus. This herpesvirus, which appears to be cell associated, has some characteristics of the cytomegaloviruses and has been found to induce chemical crystal formations in infected cell cultures.
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Chapter 6: Cell Culture Contaminants. Methods Cell Biol 1973. [DOI: 10.1016/s0091-679x(08)60051-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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17
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Abstract
A virus was isolated from a radioresistant feline fibrosarcoma. It induced multi-nucleated giant-cell formation and lysis in a cell line derived from a canine fibro-sarcoma, which was used to characterize the virus. End-point titrations in these cells required 28 days. The virus was sensitive to ether and heat and was destroyed at pH 3. Replication was not inhibited by 5-bromodeoxyuridine. Electron microscopy revealed assembly by a budding process from the plasma membrane of infected cells. The average diameter of the virion was 106 nm. Intracisternal particles with an average diameter of 45 nm were present within infected cells. In two instances secondary monolayers of feline renal cells underwent morphological transformation after inoculation of the virus. The two strains of transformed cells are now in continuous culture and do not yield infectious virus.
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Tegtmeyer P, Enders JF. Feline herpesvirus infection in fused cultures of naturally resistant human cells. J Virol 1969; 3:469-76. [PMID: 4306719 PMCID: PMC375796 DOI: 10.1128/jvi.3.5.469-476.1969] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Feline herpesvirus (FHV) attaches to, but does not penetrate, naturally resistant human embryonic lung cells. When the cells with attached virus are subsequently fused with inactivated Sendai virus, FHV causes characteristic cytopathic effects, but no infectious virus can be recovered from the infected cells.
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20
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Habermehl KO, Diefenthal W. Kinematographische Untersuchungen an Fibroblasten nach Infektion mit Ektromelievirus (M�usepocken). Arch Virol 1962. [DOI: 10.1007/bf01243304] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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