Francisella Tularensis Bacteria Description

Tularensis is a minute 0 2 3 0 2 to 0 7 m m and poorlystained gram negative intracellular.

Francisella tularensis bacteria description. Tularneissi has great invasive ability and is able to penetrate the unbroken skin. Many of the gram negative bacteria are pathogenic with pili on the surface. The pneumonic form of the disease occurs rarely but is the likely form of. Causes highly infectious as few as 10 organisms can cause disease and the organism can enter the human body through skin eyes mouth or lungs but treatable can be treated successfully with antibiotics.

Tularensis shows the following features. Summary francisella tularensis is the etiological agent of tularemia a serious and occasionally fatal disease of humans and animals. In humans ulceroglandular tularemia is the most common form of the disease and is usually a consequence of a bite from an arthropod vector which has previously fed on an infected animal. Tularensis is enough to cause fatal infection in mice guinea pigs or rabbits and a similarly small dose is enough to induce a severe or sometimes fatal infection in humans.

Also known as rabbit fever or deer fly fever it typically attacks the skin eyes lymph nodes and lungs. It is nonmotile aerobic and non spore forming bacteria. Francisella tularensis is a gram negative bacteria gram negative bacteria contain an outer membrane outside the peptidoglycan cell wall unlike gram positive bacteria that have a thicker layer of cell wall and no outer membrane. As low as 10 colony forming unit cfu of f.

The species was originally discovered in squirrels in tulare county in 1911 the county for which the bacterium is named. Tularemia is caused by the bacterium francisella tularensis. Francisella tularensis is a highly infectious agent but its virulence factors have not been well characterized. Properties of francisella tularensis.

Tularensis causes tularemia also known as glandular fever rabbit fever tick fever and deerfly fever an acute febrile gran ulomatous infectious disease in humans and other mammals. Although humans of all ages sexes and races are susceptible man to man transmission is extremely rare. The disease mainly affects rabbits hares and rodents such as muskrats and squirrels. Francisella tularensis is a pathogenic species of gram negative coccobacillus an aerobic bacterium.

Tularemia can also infect birds sheep and domestic animals such as dogs cats and hamsters. Because of the highly infectious nature f. Tularemia is a zoonosis caused by francisella tularensis the causative bacterium is a gram negative coccoid rod 0 2 0 5 µm 0 7 1 0 µm non motile and non spore forming organism that is an obligate aerobe with optimal growth at 37 c. Due to its low infectious dose ease of spread by aerosol and high.

Francisella tularensis is a gram negative bacteria and the agent causing tularemia also called rabbit fever. It is nonspore forming nonmotile and the causative agent of tularemia the pneumonic form of which is often lethal without treatment it is a fastidious facultative intracellular bacterium which requires cysteine for growth. Tularensis is currently classified as category a agent of bioterrorism.