Query: NC_016929:109500 Rickettsia canadensis str. CA410 chromosome, complete genome
Lineage: Rickettsia canadensis; Rickettsia; Rickettsiaceae; Rickettsiales; Proteobacteria; Bacteria
General Information: Members of this genus, like other Rickettsial organisms such as Neorickettsia and Anaplasma, are obligate intracellular pathogens. In both groups, the bacteria are transmitted via an insect, usually a tick, to a host organism where they target endothelial cells and sometimes macrophages. They attach via an adhesin, rickettsial outer membrane protein A, and are internalized where they persist as cytoplasmically free organisms. This organism was originally thought to be a member of the typhus group of Rickettsiales, however, it is now thought to represent a distict group with the rickettsia.
Subject: NC_011852:211314 Haemophilus parasuis SH0165, complete genome
Lineage: Haemophilus parasuis; Haemophilus; Pasteurellaceae; Pasteurellales; Proteobacteria; Bacteria
General Information: This organism is the causative agent of Glasser's disease in swine but is usually found as a commensal organism in the upper respiratory tract. Glasser's disease is responsible for significant losses in swine husbandry. The disease was first noted in 1910 by Glasser and the organism requires factor V (NAD - nicotinamide adenine dinucleotide) growth factor, like H. suis, but not factor X (iron porphyrin) which H. suis requires. Pathogenicity and virulence are often strain specific. Symptoms include fibrinous polyserositis (fibrous inflammation of serous membranes, polyarthritis (inflammation of multiple joints) and meningitis (inflammation of meninges)and pneumonia.