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Patients can develop two clinical phases: an acute septic phase and a chronic eruptive phase associated with skin lesions. [3] In the acute phase (also known as Oroya fever or fiebre de la Oroya), B. bacilliformis infection is a sudden, potentially life-threatening infection associated with high fever and decreased levels of circulating red blood cells (i.e., hemolytic anemia) and transient ...
Bartonella is a genus of Gram-negative bacteria. It is the only genus in the family Bartonellaceae. It is the only genus in the family Bartonellaceae. [ 2 ] [ 3 ] Facultative intracellular parasites , Bartonella species can infect healthy people, but are considered especially important as opportunistic pathogens . [ 4 ]
It is caused by either Bartonella henselae or B. quintana. [2] B. henselae is most often transmitted through a cat scratch or bite, [3] though ticks and fleas may also act as vectors. B. quintana is usually transmitted by lice. It can manifest in people with AIDS [4] and rarely appears in those who are immunocompetent. [citation needed]
On microscopic examination, the chronic phase and its rash are produced by angioblastic hyperplasia, or the increased rates and volume of cell growth in the tissues that form blood vessels. This results in a loss of contact between cells and a loss of normal functioning. [2] [7] The chronic phase is the more common phase.
Bartonella henselae, formerly Rochalimæa henselae, is a bacterium that is the causative agent of cat-scratch disease [1] (bartonellosis). Bartonella henselae is a member of the genus Bartonella, one of the most common types of bacteria in the world. [specify] It is a facultative intracellular microbe that targets red blood cells.
B. elizabethae, like other rodent-borne Bartonella species, represents an emerging public health threat, especially in urban areas where rats are endemic. [4] Humans are an incidental host for the pathogen — direct transmission from dogs to humans is not well attested, and most human cases are contracted from ticks serving as a vector . [ 4 ]
Bartonella bacilliformis is the etiologic agent of Carrion's disease or Oroya fever (acute phase of infection), and verruga peruana or Peruvian wart (chronic phase of infection). The acute phase of the disease is a life-threatening disease characterized by massive invasion of Bartonella to human red blood cells and consequently acute hemolysis ...
Bartonella quintana, originally known as Rochalimaea quintana, [2] and "Rickettsia quintana", [3] is a bacterium transmitted by the human body louse that causes trench fever. [4] This bacterial species caused outbreaks of trench fever affecting 1 million soldiers in Europe during World War I .