Pediatric Infections Flashcards
Sepsis (less than four weeks)
Most Likely Pathogens
Streptococcus agalactiae
Escherichia coli
Listeria monocytogenes
Herpes simplex virus
Sepsis (less than four weeks )
First choice antibiotics
Ampicillin plus gentamicin or cefotaxime
with or without Acyclovir
Sepsis (less than four weeks)
Penicillin allergy antibiotics
Vancomycin plus gentamicin or Cefotaxime
with or without acyclovir
Sepsis (greater than four weeks)
Most likely pathogens
Neisseria meningitidis
streptococcus pneumonia
Escherichia coli
staphylococcus aureus
Sepsis (greater than four weeks)
First choice antibiotics
Cefotaxime
With or without vancomycin
Sepsis (greater than four weeks)
Penicillin allergy antibiotics
Cefotaxime
with or without vancomycin
Meningitis (less than four weeks)
Most likely pathogens
Streptococcus agalactiae
Escherichia coli
Listeria monocytogenes
herpes simplex virus
Meningitis (less than four weeks)
first choice antibiotics
Ampicillin
plus Cefotaxime
plus acyclovir
Meningitis (less than four weeks)
Penicillin allergy antibiotics
Vancomycin
plus Cefotaxime
with or without Acyclovir
Meningitis (greater than four weeks)
most likely pathogens
Neisseria meningitidis
streptococcus pneumoniae
Haemophilus influenzae
Meningitis (greater than four weeks)
first choice antibiotics
Ampicillin
Plus vancomycin
With or without acyclovir
Meningitis (greater than four weeks)
Penicillin allergy antibiotics
Cefotaxime
Plus vancomycin
With or without acyclovir
Encephalitis
Most likely Pathogens
Herpes simplex virus
Encephalitis
First choice antibiotics
Acyclovir
Plus antibiotics as for meningitis
Encephalitis
penicillin allergy antibiotics
Acyclovir
Plus antibiotics as for “meningitis”
Cerebral abscess or subdural empyema
most likely Pathogens
Streptococci species staphylococcus aureus anaerobic organisms gram-negative organisms streptococcus pneumonia Haemophilus influenza
Cerebral abscess or sub dural empyema
first choice antibiotics
Cefotaxime
Plus vancomycin
Plus metronidazole
Cerebral abscess or subdural empyema
penicillin allergy antibiotics
Cefotaxime
Plus vancomycin
Plus metronidazole
Streptococcal pharyngitis/tonsillitis
Most likely Pathogens
Streptococcus pyogenes (group A strep)
Streptococcal pharyngitis/tonsillitis
first choice antibiotics
Penicillin V PO
Or amoxicillin PO
Or penicillin G
Streptococcal pharyngitis/tonsillitis
penicillin allergy antibiotics
Cephalexin PO
Or clindamycin PO
Or clarithromycin PO
Or cefazolin
Bacterial acute otits media
most likely Pathogens
Haemophilus influenza
Streptococcus pneumoniae
Moraxella catarrhalis
Bacterial acute otitis media
first choice antibiotics
Amoxicillin PO
Or amoxicillin-clavulanate PO
Bacterial acute otitis media
penicillin allergy antibiotics
Cefprozil PO
Or clarithromycin PO
Mastoiditis most likely Pathogens
Streptococcus pneumonia streptococcus pyogenes (group a strep) staphylococcus aureus
Mastoiditis
first choice antibiotics
Cefotaxime
With or without vancomycin
Mastoiditis
penicillin allergy antibiotics
Cefotaxime
With or without vancomycin
Sinusitis
most likely Pathogens
Haemophilus influenza streptococcus pneumonia Moraxella catarrhalis staphylococcus aureus streptococcus pyogenes (group a strep) Anaerobic organisms (in older children)
Sinusitis
first choice antibiotics
Amoxicillin PO
Or amoxicillin-clavulanate PO
If IV treatment required, treat as for mastoiditis
Sinusitis
penicillin allergy antibiotics
Cefprozil PO
Or clarithromycin PO
Or cefixime PO plus clindamycin PO
If IV treatment required, treat as for mastoiditis
Cervical lymphadenitis
most likely Pathogens
Staphylococcus aureus streptococcus pyogenes (group a strep)
Cervical lymphadenitis
first choice antibiotics
Cephalexin PO
Or clindamycin PO
Or cefazolin
Cervical lymphadenitis
penicillin allergy antibiotics
Clindamycin PO
Or cefazolin
Preseptal cellulitis
most likely Pathogens
Streptococcus pneumonia
Staphylococcus aureus
Preseptal cellulitis
first choice antibiotics
Cephalexin PO
Or clindamycin PO
Or cefazolin
Or vancomycin
Preseptal cellulitis
penicillin allergy antibiotics
Cefprozil PO
Or clindamycin PO
Or cefazolin
Or vancomycin
Orbital cellulitis
most likely Pathogens
Staphylococcus aureus
streptococcus pneumonia
other Streptococcus species
haemophilus influenza
Orbital cellulitis
first choice antibiotics
Cefotaxime
With or without vancomycin
Orbital cellulitis
penicillin allergy antibiotics
Cefotaxime
With or without vancomycin
Dental abscess with fever and/or extensive spread
most likely Pathogens
Viridans streptococci Peptostreptococcus species Prevotella species porphyromonas melaninogenicus fuslbacterium species usually polymicrobial
Dental abscess
with fever and or extensive spread
first choice antibiotics
Amoxicillin-clavulanate PO
Or penicillin G plus metronidazole PO
Dental abscess
with fever and or extensive spread
penicillin allergy antibiotics
Clindamycin PO/IV
Community acquired pneumonia (less than one month)
most likely Pathogens
Streptococcus agalactiae
Eacherichia coli
listeria monocytogenes
Community acquired pneumonia (less than one month)
first choice antibiotics
Ampicillin
Plus gentamicin or cefotaxime
Community acquired pneumonia (less than one month)
penicillin allergy antibiotics
Cefotaxime
Plus gentamicin
Plus vancomycin
Community acquired pneumonia (1 to 3 months)
most likely Pathogens
Streptococcus pneumonia Streptococcus agalactiae
staphylococcus aureus
Escherichia coli
chlamydia trachomatis
Community acquired pneumonia (1 to 3 months)
first choice antibiotics
Cefotaxime
With or without vancomycin
With or without clarithromycin PO
Community acquired pneumonia (1 to 3 months)
penicillin allergy antibiotics
Cefotaxime
With or without vancomycin
With or without clarithromycin PO
Community acquired pneumonia (greater than three months)
most likely Pathogens
Respiratory viruses streptococcus pneumonia haemophilus influenzae staphylococcus aureus mycoplasma pneumonia chlamydia pneumonia
Community acquired pneumonia (greater than three months)
mild
first choice antibiotics
Amoxicillin PO
Community acquired pneumonia (greater than three months)
mild
penicillin allergy antibiotics
Cefprozil PO
Community acquired pneumonia (greater than three months)
moderate
most likely Pathogens
Ampicillin
With or without clarithromycin PO
With or without oseltamivir PO
Community acquired pneumonia (greater than three months)
moderate
penicillin allergy
Cefotaxime
With or without clarithromycin PO
With or without oseltamivir PO
Community acquired pneumonia (greater than three months)
severe
First choice antibiotics
Cefotaxime
With or without vancomycin
With or without clarithromycin PO
With or without oseltamivir PO
Community acquired pneumonia (greater than three months)
severe
penicillin allergy antibiotics
Cefotaxime
With vancomycin
With or without clarithromycin PO
With or without oseltamivir PO
Parapneumonic empyema
most likely Pathogens
Staphylococcus aureus
streptococcus pneumonia
Haemophilus influenza
Parapneumonic empyema
first choice antibiotics
Cefotaxime
With or without vancomycin
Parapneumonic empyema
penicillin allergy antibiotics
Cefotaxime
With or without vancomycin
Hospital acquired pneumonia
most likely Pathogens
Staphylococcus aureus
Haemophilus influenza
Enterobacter species
Pseudomonas aeruginosa
Hospital acquired pneumonia
first choice antibiotics
Cefotaxime or piperacillin-tazobactam
With or without vancomycin
Hospital acquired pneumonia
penicillin allergy antibiotics
Cefotaxime
With or without vancomycin
With or without gentamicin
Aspiration pneumonia
most likely Pathogens
Staphylococcus aureus
Haemophilus influenza
Enterobacter species
oral anaerobes (see “dental abscess”)
Aspiration pneumonia
first choice antibiotics
Amoxicillin-clavulanate PO
Or cefuroxime PO
Plus metronidazole or clindamycin IV/PO
Aspiration pneumonia
penicillin allergy antibiotics
Cefotaxime plus clindamycin IV/PO
Or C PO
Plus metronidazole or clindamycin IV/PO
Infective endocarditis
most likely Pathogens
Viridans streptococci
Staphylococcus aureus
Infective endocarditis
first choice antibiotics
As guided by blood culture results
consult ID and cardiology
Infective endocarditis
penicillin allergy antibiotics
As guided by blood culture results
consult IT and cardiology
Urinary tract infection (less than two months)
most likely Pathogens
Escherichia coli klebsiella species proteus species Enterobacter species enterococcus species
Urinary tract infection (less than two months)
first choice antibiotics
Ampicillin plus gentamicin
Imperative to check blood and CSF cultures. If positive, exit UTI pathway.
Urinary tract infection (less than two months)
penicillin allergy antibiotics
Cefotaxime or gentamicin
Imperative to check blood and CSF cultures. If positive, exit UTI pathway
Urinary tract infection
mild
(greater than two months)
most likely Pathogens
Escherichia coli klebsiella species proteus species Enterobacter species enterococcus species staphylococcus saprophyticus (in adolescents)
Urinary tract infection
mild
(greater than two months)
first choice antibiotics
Cephalexin PO
Urinary tract infection
mild
(greater than two months)
penicillin allergy antibiotics
Cephalexin PO
Urinary tract infection
severe
(greater than two months)
most likely Pathogens
Escherichia coli
Klebsiella species
Proteus species
Enterobacter species
Urinary tract infection
severe
(greater than two months)
first choice antibiotics
Cefotaxime or gentamicin
Urinary tract infection
severe
(greater than two months)
penicillin allergy antibiotics
Cefotaxime or gentamicin
Pelvic inflammatory disease
most likely Pathogens
Neisseria gonorrhea
chlamydia trichomonas
anaerobic organisms
Pelvic inflammatory disease
first choice antibiotics
Cefixime PO or ceftriaxone IM
Plus doxycycline PO
With or without metronidazole PO
Pelvic inflammatory disease
penicillin allergy antibiotics
Cefixime PO or ceftriaxone IM
Plus doxycycline PO
With or without metronidazole PO
Bacterial gastroenteritis
most likely Pathogens
Salmonella species shigella species Campylobacter species Escherichia coli Plesiomonas shigelloides Aeromonas hydrophilic
Bacterial Gastroenteritis
first choice antibiotics
Treatment not routinely required. If severe, then treat according to susceptibilities of organism isolated.
Bacterial gastroenteritis
penicillin allergy antibiotics
Treatment not routinely required. If severe, then treat according to susceptibilities of organism isolated.
Secondary peritonitis (excluding peritoneal dialysis patients) Most likely Pathogens
Escherichia coli Klebsiella species Pseudomonas aeruginosa Enterococcus species bacteroides fragilis peptostreptococcus species
Secondary peritonitis (Excluding peritoneal dialysis patients) first choice antibiotics
Piperacillin-tazobactam
Or
Ampicillin plus gentamicin plus metronidazole
Secondary peritonitis (excluding peritoneal dialysis patients) penicillin allergy antibiotics
Cefotaxime plus metronidazole
Primary peritonitis
most likely Pathogens
Streptococcus pneumoniae
Escherichia coli
Primary peritonitis
first choice antibiotics
Cefotaxime
Primary peritonitis
penicillin allergy antibiotics
Cefotaxime
Ascending cholangitis
most likely Pathogens
Escherichia coli Klebsiella pneumoniae Enterobacter species Pseudomonas aeruginosa Enterococcus species Anaerobic organisms
Ascending cholangitis
First choice antibiotics
Ampicillin plus cefotaxime
with or without Metronidazole
Or piperacillin-tazobactam
Ascending cholangitis
Penicillin allergy antibiotics
Vancomycin with or without cefotaxime
With or without metronidazole
Antibiotic associated colitis (clostridium Difficile infection)
First choice antibiotics
Metronidazole PO
Stop all other antibiotics if possible
Cellulitis
Mild
Most likely pathogens
Streptococcus pyogenes (group A strep) Staphylococcus aureus
Cellulitis
Mild
First choice antibiotics
Cephalexin PO
Or TMP-SMX PO
Cellulitis
Mild
Penicillin allergy antibiotics
Cephalexin PO
Or TMP-SMX PO
Cellulitis
Severe
Most likely pathogens
Streptococcus pyogenes (group A strep) Staphylococcus aureus
Cellulitis
Severe
First choice antibiotics
Cefazolin with or without clindamycin PO
Cellulitis
Severe
Penicillin allergy antibiotics
Cefazolin with or without clindamycin PO
Soft tissue injury
Clean
Most likely pathogens
Not infected
Soft tissue injury
clean
first choice antibiotics
Antibiotics not required
Dog/cat/human bites
mild
most likely Pathogens
Staphylococcus aureus streptococcus species Eikenella corrodens (human) pasteurella species (dog or cat) Capnocytophaga cynodegmi (dog or cat) anaerobic organisms usually polymicrobial
Dog/cat/human bites
mild
first choice antibiotics
Amoxicillin-clavulanate PO
Dog/cat/human bites
mild
penicillin allergy antibiotics
Clindamycin PO plus TMP-SMX PO
Dog/cat/human bites
severe
most likely Pathogens
Staphylococcus aureus Streptococcus species Eikenella corrodens (humans) Pasteurella species (dog or cat) Capnocytophaga cynodegmi (dog or cat) Anaerobic organisms Usually polymicrobial
Dog/cat/human bites
Severe
First choice antibiotics
Piperacillin-tazobactam
Dog/cat/human bites
Severe
Penicillin allergy antibiotics
Clindamycin
TMP-SMX
Necrotising fasciitis (unknown etiology) Most likely pathogens
Streptococcus pyogenes (group A strep)
Staphylococcus aureus
Aerobic and anaerobic organisms
May be polymicrobial
Necrotising fasciitis (unknown etiology) First choice antibiotics
Piperacillin-tazobactam
Plus vancomycin
Plus clindamycin
Necrotising fasciitis (unknown etiology) Penicillin allergy antibiotics
Ciprofloxacin
Plus vancomycin
Plus clindamycin
Documented group A streptococcal necrotising fasciitis
First choice antibiotics
Penicillin plus clindamycin
Documented group A streptococcus necrotising fasciitis
Penicillin allergy antibiotics
Cefotaxime plus clindamycin
Osteomyelitis or septic arthritis (greater than 3 months)
Most likely pathogens
Staphylococcus aureus Streptococcus pyogenes (group A strep) Streptococcus pneumoniae Kingella Kingae Neisseria species Salmonella species
Osteomyelitis or septic arthritis (greater than 3 months)
First choice antibiotics
Cefazolin or vancomycin
Osteomyelitis or septic arthritis (greater than 3 months)
Penicillin allergy antibiotics
Cefazolin or vancomycin