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Volume 27, Number 12—December 2021
Research Letter

Wohlfahrtiimonas chitiniclastica Monomicrobial Bacteremia in a Homeless Man

Omar HarfouchComments to Author , Paul M. Luethy, Mandee Noval, and Jonathan D. Baghdadi
Author affiliation: University of Maryland Medical Center, Baltimore, Maryland, USA

Main Article


Published cases of Wohlfahrtiimonas chitiniclastica bloodstream infection*

Country of origin (reference) Age, y/sex; housing status; presentation Bacteria identified on blood cultures Microbiology tools used Antimicrobial agents and duration of treatment Outcome
France (2)
60/F; homeless; fatigue and ulcers to the scalp
W. chitiniclastica
16S rRNA sequencing
Ceftriaxone; duration not defined
Argentina (3)
70/M; homeless; altered mental status, septic shock, and plaques in the inguinal region
W. chitiniclastica
16S rRNA sequencing
Ciprofloxacin and ampicillin/sulbactam; duration not defined
Washington, USA (4)
57/M; stable home; wet gangrene of the ankle, septic shock, and multi-organ failure
Propionibacterium acnes, Staphylococcus hominis, and Wohlfahrtiimonas species
MALDI-TOF mass spectrometry and 16S rRNA sequencing
No mention of antimicrobials used
Ohio, USA (5)
41/F; stable home; abdominal pain and sacral osteomyelitis
Proteus mirabilis and W. chitiniclastica
MALDI-TOF mass spectrometry
Vancomycin, cefepime, and metronidazole; duration of 6 wks
Death from Clostridioides difficile infection
Indiana, USA (6)
37/M; not specified; necrotizing infection of lower extremities
W. chitiniclastica, Ignatzschineria
Indica, and Providencia stuartii
Not specified
Piperacillin/tazobactam, clindamycin and vancomycin, then cefepime; duration of 10 d
United Kingdom (7)
82/F; stable home; unconscious
W. chitiniclastica, P. mirabilis, Providencia rettgeri, and Staphylococcus aureus
MALDI-TOF mass spectrometry and 16S rRNA sequencing
Cefuroxime, metronidazole, and clarithromycin, then flucloxacillin; duration of 7 d
Australia (8)
54/M; stable home; unconscious, septic shock and myasis of the foot and toes
W. chitiniclastica
and Morganella morganii
MALDI-TOF mass spectrometry
Piperacillin/tazobactam, then meropenem, then ciprofloxacin; duration of 3 wks
Hawaii, USA (9)
72/M; stable home; unconscious, septic shock, and myasis of the umbilical cord
Escherichia coli and W. chitiniclastica
16S rRNA sequencing
Piperacillin/tazobactam, clindamycin, and vancomycin; duration not specified
Japan (10)
75/M; homeless; unconscious
Peptoniphilus harei on initial blood cultures. On day 20, P. mirabilis, M. morganii, Streptococcus anginosus, Streptococcus agalactiae, Bacteroides fragilis, and W. chitiniclastica
MALDI-TOF mass spectrometry and 16S rRNA sequencing
Cefazolin, then vancomycin, cefepime, and metronidazole; duration not specified
North Dakota, USA (Appendix reference 11)
70/M; stable home; fall
W. chitiniclastica
Not specified
Levofloxacin; duration not specified
Pennsylvania, USA (Appendix reference 12) 82/M; stable home; fall and confusion, myasis of the lower extremities and toes Staphylococcus aureus, W. chitiniclastica, and I. indica MALDI-TOF mass spectrometry Daptomycin for 6 wks Ceftriaxone for 2 wks Survival

*Appendix. MALDI-TOF, matrix-assisted laser desorption/ionization time-of-flight.

Main Article

  1. Tóth  EM, Schumann  P, Borsodi  AK, Kéki  Z, Kovács  AL, Márialigeti  K. Wohlfahrtiimonas chitiniclastica gen. nov., sp. nov., a new gammaproteobacterium isolated from Wohlfahrtia magnifica (Diptera: Sarcophagidae). Int J Syst Evol Microbiol. 2008;58:97681. DOIPubMedGoogle Scholar
  2. Rebaudet  S, Genot  S, Renvoise  A, Fournier  PE, Stein  A. Wohlfahrtiimonas chitiniclastica bacteremia in homeless woman. Emerg Infect Dis. 2009;15:9857. DOIPubMedGoogle Scholar
  3. Almuzara  MN, Palombarani  S, Tuduri  A, Figueroa  S, Gianecini  A, Sabater  L, et al. First case of fulminant sepsis due to Wohlfahrtiimonas chitiniclastica. J Clin Microbiol. 2011;49:23335. DOIPubMedGoogle Scholar
  4. Bonwitt  JH, Tran  M, Dykstra  EA, Eckmann  K, Bell  ME, Leadon  M, et al. Fly reservoir associated with Wohlfahrtiimonas bacteremia in a human. Emerg Infect Dis. 2018;24:3703. DOIPubMedGoogle Scholar
  5. Chavez  JA, Alexander  AJ, Balada-Llasat  JM, Pancholi  P. A case of Wohlfahrtiimonas chitiniclastica bacteremia in continental United States. JMM Case Rep. 2017;4:e005134. DOIPubMedGoogle Scholar
  6. Lysaght  TB, Wooster  ME, Jenkins  PC, Koniaris  LG. Myiasis-induced sepsis: a rare case report of Wohlfahrtiimonas chitiniclastica and Ignatzschineria indica bacteremia in the continental United States. Medicine (Baltimore). 2018;97:e13627. DOIPubMedGoogle Scholar
  7. Campisi  L, Mahobia  N, Clayton  JJ. Wohlfahrtiimonas chitiniclastica bacteremia associated with myiasis, United Kingdom. Emerg Infect Dis. 2015;21:10689. DOIPubMedGoogle Scholar
  8. Connelly  KL, Freeman  E, Smibert  OC, Lin  B. Wohlfahrtiimonas chitiniclastica bloodstream infection due to a maggot-infested wound in a 54-year-old male. J Glob Infect Dis. 2019;11:1256. DOIPubMedGoogle Scholar
  9. Nogi  M, Bankowski  MJ, Pien  FD. Wohlfahrtiimonas chitiniclastica infections in 2 elderly patients, Hawaii, USA. Emerg Infect Dis. 2016;22:5678. DOIPubMedGoogle Scholar
  10. Katanami  Y, Kutsuna  S, Nagashima  M, Takaya  S, Yamamoto  K, Takeshita  N, et al. Wohlfahrtiimonas chitiniclastica bacteremia hospitalized homeless man with squamous cell carcinoma. Emerg Infect Dis. 2018;24:17468. DOIPubMedGoogle Scholar

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Page updated: November 21, 2021
Page reviewed: November 21, 2021
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