The virulent cholera spirillum possesses a greater number of bacteriolytic and agglutinable haptophore groups, or these groups are endowed with a greater avidity for uni- and amboceptors than the avirulent. The number or the avidity of the bacteriolytic receptors possessed by a bacterium is directly proportional to its virulence. However, the agglutinable receptors do not follow this law, i.e.,...

Francisella tularensis is composed of a number of subspecies with varied geographic distribution, host ranges, and virulence. In view of these marked differences, comparative functional genomics may elucidate some of the molecular mechanism(s) behind these differences. In this study a shared probe microarray was designed that could be used to compare the transcriptomes of Francisella tularensis...

Both the prevalence of Helicobacter pylori infection and the incidence of gastric cancer are high in Bhutan. The high incidence of atrophic gastritis and gastric cancer suggest the phylogeographic origin of an infection with a more virulent strain of H. pylori. More than 90% of Bhutanese strains possessed the highly virulent East Asian-type CagA and all strains had the most virulent type of vac...

AIMS To identify Lactococcus garvieae isolates from radish and broccoli sprouts and compare them with virulent and less virulent mutant strains obtained from yellowtails with regard to KG phenotype, presence of a capsule and virulence towards yellowtails and mice. METHODS AND RESULTS Comparative 16S rRNA gene sequence analysis of six isolates obtained from radish and broccoli sprouts indicate...

Infectious laryngotracheitis (ILT) is an acute respiratory disease caused by infectious laryngotracheitis virus (ILTV). The complete genome sequences of five attenuated ILTV vaccine strains and six virulent ILTV strains as well as two Australian ILTV field strains have been published in Australia and the USA so far. To provide the complete genome sequence information of ILTVs from different geo...

Many enteric pathogens are thought to enter a viable but nonculturable state when deprived of nutrients. Virulent strains of the enteric pathogen Vibrio parahaemolyticus are rarely isolated from their low-nutrient aquatic environments, possibly due to their nonculturability. Host factors such as bile may trigger release from dormancy and increase virulence in these strains. In this study, the a...

The relationship of the colonial morphology of Pasteurella pestis to its virulence has been controversial. Gotschlich (1900), Markl (1914), Petrie (1929), Burgess (1930), Otten (1936), Bhatnagar (1940) and Jawetz and Meyer (1943) described numerous colonial types for which interchangeable descriptions are lacking. Most agreed upon an inconstant hereditary transmission of colonial characteristic...

Classical swine fever virus (CSFV) is transmitted via secretions and excretions of infected pigs. The efficiency and speed of the transmission depends on a multitude of parameters, like quantities of virus excreted by infected pigs. This study provides quantitative data on excretion of CSFV over time from pigs infected with a highly, moderately or low virulent strain. For each strain, five indi...

From the results of etiological study of the disease known as akiyami which prevails in the Shida district of Shizuoka province, we conclude that: 1. Akiyami is an infectious disease caused by a leptospira. 2. The leptospira causing akiyami is very difficult to differentiate morphologically from Leptospira icterohoemorrhagioe and Leptospira hebdomadis. 3. The strains of leptospira isolated from...