Epizootics
Mostrando 13-24 de 41 artigos, teses e dissertações.
-
13. Two epizootics of lymphocytic choriomeningitis virus occurring in laboratory mice despite intensive monitoring programs.
Two epizootics of lymphocytic choriomeningitis virus in mice occurred within two months in one research facility consisting of several widely separated rooms. These outbreaks developed despite intensive institutional monitoring policies designed to prevent introduction and spread of lymphocytic choriomeningitis virus. Evidence derived from serological and vi
-
14. Venezuelan equine encephalitis emergence: Enhanced vector infection from a single amino acid substitution in the envelope glycoprotein
In 1993 and 1996, subtype IE Venezuelan equine encephalitis (VEE) virus caused epizootics in the Mexican states of Chiapas and Oaxaca. Previously, only subtype IAB and IC VEE virus strains had been associated with major outbreaks of equine and human disease. The IAB and IC epizootics are believed to emerge via adaptation of enzootic (sylvatic, equine-avirule
National Academy of Sciences.
-
15. Characteristics of Cytophaga psychrophila (Borg) Isolated from Outbreaks of Bacterial Cold-Water Disease
Characteristics of 10 strains of Cytophaga psychrophila isolated during a number of epizootics of bacterial cold-water disease were compared. Morphological, cultural, biochemical, and serological data showed that the organisms were very closely related. The isolates exhibited gliding motility, formed neither fruiting bodies nor microcysts, were actively prot
-
16. Transmission to Eels, Portals of Entry, and Putative Reservoirs of Vibrio vulnificus Serovar E (Biotype 2)
Vibrio vulnificus serovar E (formerly biotype 2) is the etiologic agent that is responsible for the main infectious disease affecting farmed eels. Although the pathogen can theoretically use water as a vehicle for disease transmission, it has not been isolated from tank water during epizootics to date. In this work, the mode of transmission of the disease to
American Society for Microbiology.
-
17. Pathology and Epizootiology of Entomophaga maimaiga Infections in Forest Lepidoptera
The insect-pathogenic fungal pathogen Entomophaga maimaiga is endemic to northeastern Asia and was first found in North America in 1989. Due to repeated epizootics and spread within populations of the major forest defoliator in northeastern North America, the gypsy moth (Lymantria dispar), this pathogen has gained much notoriety. Although this pathogen was p
American Society for Microbiology.
-
18. Emergence of a new epidemic/epizootic Venezuelan equine encephalitis virus in South America.
One of the most important questions in arbovirology concerns the origin of epidemic Venezuelan equine encephalitis (VEE) viruses; these viruses caused periodic, extensive epidemics/epizootics in the Americas from 1938-1973 (reaching the United States in 1971) but had recently been presumed extinct. We have documented the 1992 emergence of a new epidemic/epiz
-
19. Experimental Venezuelan Equine Encephalomyelitis Virus Infection of the Bovine
Two groups of four dairy cows (Bos taurus) were infected subcutaneously with the epizootic Venezuelan equine encephalomyelitis virus (VEE) strains MF-8 and San Pelayo, respectively. Animals experienced no clinical illness, but all developed significant neutropenia. Virus was recovered once each from the blood of three animals but did not exceed 102.2 SMICLD5
-
20. Allozyme and restriction fragment length polymorphism analyses confirm Entomophaga maimaiga responsible for 1989 epizootics in North American gypsy moth populations.
In 1989, populations of North American gypsy moth, Lymantria dispar, in seven contiguous northeastern states were severely reduced by a fungal pathogen. Based on morphology, development, and pathology, this organism appeared to be Entomophaga maimaiga. We have now used allozyme and restriction fragment length polymorphism analyses to confirm this identificat
-
21. Problems in the Laboratory Isolation of Simian Hemorrhagic Fever Viruses and Isolation of the Agent Responsible for the Sussex/69 Epizootic
At least six epizootics of simian hemorrhagic fever have occurred at four different primate centers. Although these diseases could easily be transmitted to other monkeys of the Macaca species, difficulty has been encountered in isolating the causative virus in cell culture. The results of this study have shown that the isolation of simian hemorrhagic fever v
-
22. Evidence that water transmits Vibrio vulnificus biotype 2 infections to eels.
Vibrio vulnificus biotype 2 is classically considered an obligate eel pathogen. However, it has recently been associated with one human septicemic case. In this paper, the opportunistic behavior of this pathogen is discussed. The bacterium can survive alone in brackish water or attached to eel surfaces for at least 14 days. It is able to spread through water
-
23. Identification of a multidrug efflux pump in Flavobacterium johnsoniae
In this study, the mechanism conferring multiple drug resistance in several strains of flavobacteria isolated from the ovarian fluids of hatchery reared 3-year old brook trout Salvelinus fontinalis was investigated. Metabolic fingerprinting and 16S rRNA gene sequences identified the isolates as Flavobacterium johnsoniae. The isolates exhibited multiple resis
EDP Sciences.
-
24. Foreign animal disease outbreaks, the animal welfare implications for Canada: Risks apparent from international experience
Any outbreak of an Office International des Épizooties List A disease, such as classical swine fever or foot and mouth disease, has severe consequences for animal welfare, livestock production, exports of animals and animal products, and the environment. The public concern with the animal welfare effects of methods of disease eradication that result in the