dx clinical. #rickettsia #parkeri Dx confirmed by 4x or greater rise in antibody titer between acute & convalescent-phase serum samples. Acute-phase specimens are taken during 1st week of illness &convalescent-phase samples are generally obtained 2–4 weeks after the resolution of illness.

gulf coast tick: Post-tick bite antibiotic prophylaxis is not recommended to prevent rickettsial infection. Observe clinically for clinical sx for 2 wks post bite #rickettsia #parkeri

#rickettsia #parkeri Doxycycline is the treatment of choice and should be started emprically based on clinical suspicion. Dont wait for lab confirmation.

#rickettsia #parkeri eschar f/b fever, muscle pain, headache & rash. Rash: maculopapular or vesicular eruptions on trunk/ extremities. Regional lymphadenopathy is detected in 25% of pts. GI sx are rare. Pts often develop mild transaminitis, mild leukopenia & less frequently mild thrombocytopenia.

Rickettsia parkeri in Amblyomma americanum Ticks, Tennessee and Georgia, USA To determine the geographic distribution of the newly recognized human pathogen Rickettsia parkeri, we looked for this organism in ticks from Tennessee and Georgia, USA. Using PCR and sequence analysi...

mmwr cases of #rickettsia #parkeri seen in #amblyomma ticks pmc.ncbi.nlm.nih.gov/articles/PMC...

#rickettsia #parkeri #gulfcoasttick

Dx: serology, immunochemistry, PCR of culture from skin biopsy or eschar swab #parkeri #rickettsia

R #parkeri aka American Boutonneuse Fever. Lone star or Gulf coast ticks (Amblyomma maculatum). Generally SE US/Gulf Coast but mmwr cases from Arizona. Also Argentina, Uruguay, Brazil. Sx: HA, myalgia, skin faint salmon rash, single/multiple eschar

eschar followed by fever & rash is highly suggestive of rickettsial spotted fever. #Rickettsia #parkeri, a tick-borne infection that occurs in the mid & South Atlantic states, S Central & Gulf coast states of USA, as well as in S America.

Vector of the Month: #Amblyomma #ovale, a #Neotropical #tick transmitting #Rickettsia #parkeri, authored by Barbara Weck, Álvaro Faccini-Martínez, Marcelo Labruna & Sebastián Muñoz-Leal ‪@niaidnews.bsky.social‬ ‪@uspoficial.bsky.social‬ @udeconcepcion.bsky.social
authors.elsevier.com/a/1lPlh5Eb1x...