page_title: Legionella jordanis
section_title: Pathogenesis
hierarchical_section_title: Legionella jordanis / Pathogenesis
caption_attribution_description: English: Micrograph of aspergillosis. H&amp;E stain. Aspergillus hyphae have a uniform thickness and typically branch at a 45 degree angle. Related images Aspergillosis - cytology Zygomycosis - cytology
context_page_description: Legionella jordanis is a Gram-negative bacterium from the genus Legionella which was isolated from the Jordan River in Bloomington, Indiana and from the sewage in DeKalb County, Georgia. L. jordanis is a rare human pathogen and can cause respiratory tract infections.
context_section_description: L. jordanis is an opportunistic pathogen. It has been shown to cause lower respiratory tract infections in humans and is responsible for causing a type of pneumonia commonly referred to as Legionnaires' disease. Lung infection with L. jordanis is sometimes misdiagnosed as an Aspergillus mold infection. This mold also causes a fatal type of pneumonia which L. jordanis is able to mimic. Using human sera, indirect fluorescent antibody tests strongly indicated that unrecognized human infections with L. jordanis may be occurring. A study of patients from Memorial Sloan-Kettering Cancer Center in New York, NY revealed a possible risk of nosocomial infections from shower heads found to contain L. jordanis. After this finding, monthly shower head disinfection procedures were instituted, but about 19% of shower heads remained positive for Legionella. Infections of individuals who are not immunocompromised are also possible.
caption: Gram stain of Aspergillus which can cause pulmonary aspergillosis, which L. jordanis can mimic
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