Yersinia enterocolitica is a gram-negative bacillus that is known for causing gastroenteritis. [1]
Pasteurella Multocida
Pasteurella derives its name from the French scientist Louis Pasteur (Pasteur→Pasteurella) and belongs to the Pasteurellaceae family. [1]
Brucella
Some clinically important members of the Brucella family include Brucella abortus, Brucella melitensis, Brucella canis and Brucella suis. [1]
Yersinia Pestis
The organism is known for causing plague/black death that resulted in millions of deaths in the past.
Reservoirs for Yersinia pestis include wild rodents, squirrels, prairie dogs, and city rats. [1,2]
Francisella Tularensis
Some subspecies of Francisella tularensis are the following [1]:
Subspecies tularensis (type A)-most virulent
Subspecies Holarctica (type B)
subsp. mediaasiatica
Legionella Pneumophila
A pneumonia outbreak occurred in 1976 among American Legion members at a convention in Philadelphia. Subsequent investigations identified Legionella pneumophila as the causative organism for this outbreak. Legionella was an unknown organism before that outbreak because it exhibits poor gram staining and needs specific culture media for optimum growth. (named so: legion →legionella).
Haemophilus Influenzae
Unencapsulated strains of Haemophilus influenzae can be normally present in the human respiratory tract [1]. However, pathogenic strains can cause diseases in all age groups, from children to adults. Some notable diseases caused by H. influenzae in children include epiglottitis, meningitis, and septic arthritis [2].
Mycoplasma Pneumoniae
Mycoplasma pneumoniae is a pleomorphic free-living organism that belongs to the Mycoplasmataceae family [1]. It is also sometimes referred to as the Eaton agent, named so after the name of the researcher who initially isolated the organism [2].
Treponema pallidum
Treponema pallidum is a thin spirochete that is known for causing syphilis [1]. Other species of this group and the corresponding diseases they cause are the following [2]:
Treponema pallidum pertenue: yaws
Treponema pallidum endemicum: endemic syphilis
Treponema pallidum carateum: pinta
Borrelia
Some clinically important species of the Borrelia family include Borrelia burgdorferi and Borrelia recurrentis.