Blood culture contamination - Revision history

Aidan at 15:21, 18 March 2026

2026-03-18T15:21:53Z

← Older revision		Revision as of 15:21, 18 March 2026
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			{\| class="wikitable"
⚫	* '''Almost never''' true bacteremia (almost always contaminant)
			!Frequency of True Bacteremia
⚫	** [[Corynebacterium]], except [[Corynebacterium jeikeium]]
			!Organism
⚫	** [[Bacillus]], except [[Bacillus anthracis]]
			!Gram Stain
⚫	** [[Cutibacterium acnes]]
			\|-
⚫	* '''Sometimes''' true bacteremia
		⚫	\| rowspan="3" \|'''Almost never''' true bacteremia (almost always contaminant)
⚫	** [[Micrococcus]]
		⚫	\|[[Corynebacterium]], except [[Corynebacterium jeikeium]]
⚫	** [[Clostridium perfringens]]
			\|Gram-positive bacillus
⚫	** [[Coagulase-negative staphylococci]]
			\|-
⚫	** [[Viridans group streptococci]]
		⚫	\|[[Bacillus]], except [[Bacillus anthracis]]
⚫	** [[Lactobacillus]]
			\|Gram-positive bacillus
⚫	** [[Nutritionally variant streptococci]] ([[Abiotrophia]] and [[Granulicatella]])
			\|-
⚫	* '''~~Often~~''' true bacteremia
		⚫	\|[[Cutibacterium acnes]]
⚫	** [[Enterococcus]]
			\|Gram-positive bacillus
⚫	** [[Aerococcus]]
			\|-
⚫	* '''Always''' true bacteremia (or at least, always treated as such)
		⚫	\| rowspan="6" \|'''Sometimes''' true bacteremia
⚫	** [[Staphylococcus aureus]]
		⚫	\|[[Micrococcus]]
⚫	** [[Streptococcus pneumoniae]]
			\|Gram-positive cocci in groups
⚫	** [[Escherichia coli]] and other [[Enterobacterales]]
			\|-
⚫	** [[Pseudomonas aeruginosa]]
		⚫	\|[[Clostridium perfringens]]
⚫	** [[Candida ~~albicans~~]]
			\|Anaerobic Gram-positive bacillus
			\|-
		⚫	\|[[Coagulase-negative staphylococci]], except [[Staphylococcus lugdenensis]]
			\|Gram-positive cocci in groups
			\|-
		⚫	\|[[Viridans group streptococci]]
			\|Gram-positive cocci in pairs and chains
			\|-
		⚫	\|[[Lactobacillus]]
			\|Gram-positive bacillus
			\|-
		⚫	\|[[Nutritionally variant streptococci]] ([[Abiotrophia]] and [[Granulicatella]])
			\|Gram-positive cocci in pairs and chains
			\|-
		⚫	\| rowspan="2" \|'''Usually''' true bacteremia
		⚫	\|[[Enterococcus]]
			\|Gram-positive cocci in pairs and chains
			\|-
		⚫	\|[[Aerococcus]]
			\|Gram-positive cocci in pairs and chains
			\|-
		⚫	\| rowspan="6" \|'''Always''' true bacteremia (or at least, always treated as such)
		⚫	\|[[Staphylococcus aureus]]
			\|Gram-positive cocci in groups
			\|-
			\|[[Staphylococcus lugdenensis]]
			\|Gram-positive cocci in groups
			\|-
		⚫	\|[[Streptococcus pneumoniae]]
			\|Gram-positive cocci in pairs and chains
			\|-
		⚫	\|[[Escherichia coli]] and other [[Enterobacterales]]
			\|Gram-negative bacilli
			\|-
		⚫	\|[[Pseudomonas aeruginosa]]
			\|Gram-negative bacilli
			\|-
		⚫	\|[[Candida]]
			\|Yeast
			\|}
	* [[Coagulase-negative staphylococci]] are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia		* [[Coagulase-negative staphylococci]] are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia

Aidan at 14:52, 6 February 2026

2026-02-06T14:52:40Z

← Older revision		Revision as of 14:52, 6 February 2026
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	* '''Almost never''' true bacteremia		* '''Almost never''' true bacteremia (almost always contaminant)
	** [[Corynebacterium]], except [[Corynebacterium jeikeium]]		** [[Corynebacterium]], except [[Corynebacterium jeikeium]]
	** [[Bacillus]], except [[Bacillus anthracis]]		** [[Bacillus]], except [[Bacillus anthracis]]
Line 5:		Line 5:
	* '''Sometimes''' true bacteremia		* '''Sometimes''' true bacteremia
	** [[Micrococcus]]		** [[Micrococcus]]
⚫	** [[Enterococcus]]
	** [[Clostridium perfringens]]		** [[Clostridium perfringens]]
	** [[Coagulase-negative staphylococci]]		** [[Coagulase-negative staphylococci]]
			** [[Viridans group streptococci]]
			** [[Lactobacillus]]
			** [[Nutritionally variant streptococci]] ([[Abiotrophia]] and [[Granulicatella]])
			* '''Often''' true bacteremia
		⚫	** [[Enterococcus]]
			** [[Aerococcus]]
	* '''Always''' true bacteremia (or at least, always treated as such)		* '''Always''' true bacteremia (or at least, always treated as such)
	** [[Staphylococcus aureus]]		** [[Staphylococcus aureus]]

Aidan at 14:49, 6 February 2026

2026-02-06T14:49:55Z

← Older revision		Revision as of 14:49, 6 February 2026
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	** [[Clostridium perfringens]]		** [[Clostridium perfringens]]
	** [[Coagulase-negative staphylococci]]		** [[Coagulase-negative staphylococci]]
	* '''Always''' true bacteremia		* '''Always''' true bacteremia (or at least, always treated as such)
	** [[Staphylococcus aureus]]		** [[Staphylococcus aureus]]
	** [[Streptococcus pneumoniae]]		** [[Streptococcus pneumoniae]]
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	** [[Candida albicans]]		** [[Candida albicans]]
	* [[Coagulase-negative staphylococci]] are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia		* [[Coagulase-negative staphylococci]] are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia

			== Further Reading ==

			* Laboratory approaches to determining blood culture contamination rates: an ASM Laboratory Practices Subcommittee report. ''J Clin Microbiol''. 2023;62:e01028-23. doi: [https://doi.org/10.1128/jcm.01028-23 10.1128/jcm.01028-23]

	[[Category:Microbiology]]		[[Category:Microbiology]]

Aidan at 23:39, 9 August 2024

2024-08-09T23:39:30Z

← Older revision		Revision as of 23:39, 9 August 2024
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	* '''~~Never~~''' bacteremia		* '''Almost never''' true bacteremia
	** ''[[Corynebacterium]]''		** [[Corynebacterium]], except [[Corynebacterium jeikeium]]
	** ''[[Bacillus]]'', except ~~''B.~~ anthracis''		** [[Bacillus]], except [[Bacillus anthracis]]
	** ''[[~~Propionobacterium~~ acnes]]''		** [[Cutibacterium acnes]]
	* '''~~Almost never~~''' bacteremia		* '''Sometimes''' true bacteremia
	** ''[[Micrococcus]]''		** [[Micrococcus]]
	** ''[[Enterococcus]]''		** [[Enterococcus]]
	** ''[[Clostridium perfringens]]''		** [[Clostridium perfringens]]
	** [[Coagulase-negative staphylococci]]		** [[Coagulase-negative staphylococci]]
	* '''Always''' true bacteremia		* '''Always''' true bacteremia
	** ''[[Staphylococcus aureus]]''		** [[Staphylococcus aureus]]
	** ''[[Streptococcus pneumoniae]]''		** [[Streptococcus pneumoniae]]
	** ''[[Escherichia coli]]''		** [[Escherichia coli]] and other [[Enterobacterales]]
			** [[Pseudomonas aeruginosa]]
	** Enterobacteraciae
	** ''[[~~Pseudomonas~~ ~~aeruginosa~~]]''		** [[Candida albicans]]
		⚫	* [[Coagulase-negative staphylococci]] are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia
	** ''[[Candida albicans]]''
⚫	* Coagulase-negative staphylococci are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia.

	[[Category:Microbiology]]		[[Category:Microbiology]]

Aidan at 10:10, 16 August 2019

2019-08-16T10:10:55Z

← Older revision		Revision as of 10:10, 16 August 2019
Line 16:		Line 16:
	** ''[[Candida albicans]]''		** ''[[Candida albicans]]''
	* Coagulase-negative staphylococci are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia.		* Coagulase-negative staphylococci are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia.

			[[Category:Microbiology]]

Aidan at 23:28, 14 August 2019

2019-08-14T23:28:56Z

← Older revision		Revision as of 23:28, 14 August 2019
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	* ''Never'' bacteremia		* '''Never''' bacteremia
	** ''Corynebacterium''		** ''[[Corynebacterium]]''
	** ''Bacillus'', except ''B. anthracis''		** ''[[Bacillus]]'', except ''B. anthracis''
	** ''Propionobacterium acnes''		** ''[[Propionobacterium acnes]]''
	* ''Almost never'' bacteremia		* '''Almost never''' bacteremia
	** ''Micrococcus''		** ''[[Micrococcus]]''
	** ''Enterococcus''		** ''[[Enterococcus]]''
	** ''Clostridium perfringens''		** ''[[Clostridium perfringens]]''
	** Coagulase-negative staphylococci		** [[Coagulase-negative staphylococci]]
	* ''Always'' true bacteremia		* '''Always''' true bacteremia
	** ''~~Saphylococcus~~ aureus''		** ''[[Staphylococcus aureus]]''
	** ''Streptococcus pneumoniae''		** ''[[Streptococcus pneumoniae]]''
	** ''Escherichia coli''		** ''[[Escherichia coli]]''
	** Enterobacteraciae		** Enterobacteraciae
	** ''Pseudomonas aeruginosa''		** ''[[Pseudomonas aeruginosa]]''
	** ''Candida albicans''		** ''[[Candida albicans]]''
	* Coagulase negative staphylococci are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia.		* Coagulase-negative staphylococci are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia.

Aidan: /* Blood culture contaminants */

2019-08-14T23:27:33Z

Blood culture contaminants

← Older revision		Revision as of 23:27, 14 August 2019
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	= Blood culture contaminants =

	* ''Never'' bacteremia		* ''Never'' bacteremia
	** ''Corynebacterium''		** ''Corynebacterium''

Maintenance script: Imported from text file

2019-08-11T18:05:48Z

Imported from text file

New page

= Blood culture contaminants =

* ''Never'' bacteremia
** ''Corynebacterium''
** ''Bacillus'', except ''B. anthracis''
** ''Propionobacterium acnes''
* ''Almost never'' bacteremia
** ''Micrococcus''
** ''Enterococcus''
** ''Clostridium perfringens''
** Coagulase-negative staphylococci
* ''Always'' true bacteremia
** ''Saphylococcus aureus''
** ''Streptococcus pneumoniae''
** ''Escherichia coli''
** Enterobacteraciae
** ''Pseudomonas aeruginosa''
** ''Candida albicans''
* Coagulase negative staphylococci are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia.