| isolation of porcine circovirus-like viruses from pigs with a wasting disease in the usa and europe. | samples of lung, liver, kidney, pancreas, spleen, and lymph node from pigs with postweaning multisystemic wasting syndrome from california (usa) and samples of mesenteric lymph nodes from similarly diseased pigs from brittany (france) were examined by light microscopy, in situ hybridization (ish), and/or virus isolation. whole genomic probes for porcine circovirus (pcv) and chicken anemia virus (cav) were used for ish. tissue homogenate supernatants were inoculated onto pk/15 cells for virus iso ... | 1998 | 9526853 |
| viral antibodies in coyotes from california. | prevalence of antibodies against canine parvovirus (cpv), canine distemper virus (cdv), and canine adenovirus type 1 (cav) were determined among 152 coyotes (canis latrans) at the naval petroleum reserves (nprc; california, usa) from 1985 to 1990. overall prevalence of antibodies to cpv, cdv, and cav was 66%, 37%, and 68%, respectively. prevalence of cpv and cdv varied significantly among years. antibody prevalence did not differ between sexes for any disease, but did vary significantly among ag ... | 1998 | 9577772 |
| chicken anemia virus in broilers: dynamics of the infection in two commercial broiler flocks. | chicken anemia virus (cav) can cause a disease syndrome characterized by severe anemia, bone marrow atrophy, and severe immunosuppression in young chicks. maternal antibodies prevent these clinical signs but do not prevent infection, transmission of the virus, or immunosuppression. the clinical disease is rare today because of the widespread practice of vaccinating breeders, but the subclinical form of the disease is ubiquitous. the dynamics of cav infection, cav antibody responses, relative lym ... | 2003 | 14708998 |
| data from 11 years of molecular typing infectious bronchitis virus field isolates. | in 1993, a new molecular typing method for infectious bronchitis virus (ibv) was introduced. this method uses reverse transcriptase-polymerase chain reaction (rt-pcr) and restriction fragment length polymorphism (rflp) analysis of the spike gene to obtain rflp patterns that correlate with serotype. using that test at the poultry diagnostic and research center (pdrc, university of georgia, athens, ga), we have identified a total of 1523 ibv isolates in the past 11 yr. the data were obtained from ... | 2005 | 16405010 |
| molecular and serologic characterization, pathogenicity, and protection studies with infectious bronchitis virus field isolates from california. | in this study, we characterized three variant infectious bronchitis virus (ibv) strains isolated in 2003 and 2004 from broiler chickens in california and compared them to previously isolated california variant viruses and to common vaccine serotypes used in the united states. we conducted genetic, serologic, and pathogenicity studies on all three isolates, then tested different vaccines against one of the viruses. genetically the three variant ibv strains, designated ca557/03, ca706/03, and ca17 ... | 2007 | 17626478 |
| characteristics of a very virulent infectious bursal disease virus from california. | an outbreak of infectious bursal disease (ibd) in two california layer flocks resulted in the isolation of two infectious bursal disease viruses designated ra and rb. increased mortality plus gross and histopathology in the layer flocks suggested ra and rb could be very virulent infectious bursal disease virus (vvibdv). preliminary studies indicated that high mortality resulted when bursa homogenates from the layer farms were used to inoculate specific-pathogen-free (spf) chicks. in addition, ra ... | 2009 | 20095162 |