Newman Flashcards
MC organisms causing acute bacterial meningitis in children of different ages:
1 mo-3 mo:
3 mo-3 yrs:
3 yrs-10 yrs:
10yrs-19yrs:
1 mo-3 mo: GBS
3 mo-3 yrs: S. pneumoniae
3 yrs-10 yrs: S. pneumoniae
10yrs-19yrs: N. meningitidis
What is the difference in acquisition between early-onset (7 days) Group B Strep in neonates?
EARLY-onset GBS reflects vertical transmission from maternal vaginal flora.
LATE-onset GBS suggests community or nosocomial acquisition, although the maternal flora now colonizing the neonate may still be a source of infection.
TQ Mainstay of therapy for tx of MRSA in the pediatric pt:
Vancomycin
classic signs and sx of pediatric bacterial meningitis: (3)
- Fever
- Headache (less likely in younger children)
- Meningeal signs (less likely in younger children)
- Brudzinski and Kernig signs
Signs and sx of pediatric bacterial meningitis in neonates:
- Fever, hypothermia
- Poor feeding, listlessness, hypotonia, pallor, lethargy
- Irritability, shrill cry
- Apnea, seizures
- Jaundice, bulging fontanelle
- Hypoglycemia, intractable metabolic acidosis, shock
Signs and sx of pediatric bacterial meningitis in older infants and children:
Definitive diagnosis is based on:
- Fever, hypothermia (if severely ill)
- Nuchal rigidity, opisthotonos, Kernig sign, Brudzinski sign
- Headache, irritability, lethargy, photophobia, alteration of the sensorium
- Vomiting, nausea, anorexia Definitive diagnosis is based on:
- Bacteria isolated from CSF obtained via lumbar puncture
- Evidence of meningeal irritation demonstrated by increased pleocytosis, elevated protein level, and low glucose level in the CSF
TQ
Bacterial meningitis
- Appearance:
- Pressure:
- WBC count:
- Differential count (predominance):
- Protein:
- Glucose:
- Gram stain:
Bacterial meningitis
- Appearance: Turbid
- Pressure: Elevated
- WBC count: >1000
- Differential count (predominance): PMNs
- Protein: Elevated
- Glucose: Low
- Gram stain: G+
Pathophysiology of pediatric bacterial meningitis:
- Bacteria enter the ____________ _____ hematogenously (across the blood brain barrier)
- Bacteria reach the meninges directly from a parameningeal infection (eg, sinusitis, mastoiditis, otitis media, brain abscess, spinal epidural abscess)
- Intense host inflammatory response (cytokines, ___, ____)
- Ultimate damage to neuron/apoptosis
Pathophysiology of pediatric bacterial meningitis:
- Bacteria enter the SUBARACHNOID SPACE hematogenously (across the blood brain barrier)
- Bacteria reach the meninges directly from a parameningeal infection (eg, sinusitis, mastoiditis, otitis media, brain abscess, spinal epidural abscess)
- Intense host inflammatory response (cytokines, IL-1, TNF-a)
- Ultimate damage to neuron/apoptosis
TQ
What is Cushing’s Triad associated with increased ICP and brain edema?
- BP increases
- HR decreases
- Respirations become irregular (signifies brainstem involvement)
List the organisms responsible for neonatal bacterial meningitis. (6)
Bacteria acquired from the maternal vaginal flora:
- Gram negative enteric flora
- Group B streptococcus (Streptococcus agalactiae) – Early onset (7 days of life)
- Staphylococcus epidermidis (coag negative Staph)
- Candida
- Listeria monocytogenes (well known but uncommon)
- Citrobacter (uncommon but associated with brain abscesses)
List the organisms responsible for bacterial meningitis in infants (>3 mo) and children: (2)
- S pneumoniae (leading cause)
- N meningitidis
TQ What would you see on LP in viral meningitis?
- WBC diff count:
- RBCs:
- Protein: Rx?
- WBC diff count: Lymphocytes
- RBCs: Increased
- Protein: Increased
Rx acyclovir
- Fever
- Racing heart
- Rapid or labored breathing
- Cool extremities
- Color changes
Sepsis in pediatric pt
Explain the pathophysiology of sepsis.
- Release of pro-inflammatory mediators exceeds the boundaries of the local infection
- Generalized inflammatory response (SIRS: Systemic Inflammatory Immune Response)
- Cytokines (tumor necrosis factor-alpha, interleukin-1)
- Complement activation
- Genetic susceptibility
Earliest and mildest manifestation of sepsis: (3)
- Hyperthermia (or hypothermia)
- Tachypnea
- Tachycardia
- Increased cardiac output
- Peripheral vasodilation
- Increased tissue oxygen consumption
- Hypermetabolic state
Warm shock
- Cardiac output falls
- Peripheral vascular resistance increases
- Shunting of blood
Cold shock
Bacterial etiologies of early-onset neonatal sepsis: (4)
- Group B streptococcus (Streptococcus agalactiae)*
- Escherichia coli
- Haemophilus influenzae
- Listeria monocytogenes
Bacterial etiologies of late-onset neonatal sepsis: (6)
- Coagulase-negative Staphylococcus (S epidermidis)
- Staphylococcus aureus
- E. coli
- Klebsiella species
- Candida species
- GBS
MC bacterial etiology of infantile meningitis worldwide:
H influenzae type b (Hib)
MC bacterial etiologies in infants and children in the United States and developed world: (5)
- E coli
- S aureus
- S pneumoniae
- N meningitides
- S pyogenes
TQ
Intrapartum antibiotic prophylaxis
- When in labor, __________ or __________ is given IV every 4 hours until delivery with at least one dose given 4 hours before birth
- Due to IAP, the rate of (early/late) onset GBS dz has decreased significantly
Intrapartum antibiotic prophylaxis
- When in labor, PENICILLIN or AMPICILLIN is given IV every 4 hours until delivery with at least one dose given 4 hours before birth
- Due to IAP, the rate of EARLY onset GBS dz has decreased significantly (IAP has no affected the rate of late onset dz)*
Occurs within the first 24 hours up to 1 week of age
Signs and symptoms
- Tachypnea
- Grunting
- Flaring
- Apnea
- Cyanosis
- Hypotension (25% of cases)
- Temperature instability
- Poor feeding
- Tachycardia
- Jaundice
- Lethargy
* Dx: (early/late) onset GBS dz
EARLY onset GBS dz Risk factors for EOD
- Maternal colonization at birth
- Preterm birth
- ROM >18 hours prior to delivery
- Lack of maternal antibodies to type specific capsular polysaccharides and protein antigens
- Chorioamnionitis
- Multiple gestation
- Nonwhite maternal race
- Intrapartum fever >38 C
- Intrauterine monitoring
- Postpartum maternal bacteremia
- Having had a previous infant with invasive GBS disease
TQ
- Generally more mildly ill upon presentation
- 65% present as bacteremia without a defined focus
- 25% to 30% present with meningitis
- Septic arthritis (hip, knee, ankle)
- Osteomyelitis (humerus most common, femur, tibia)***
- Cellulitis and adenitis
Dx: (early/late) onset GBS dz
LATE onset GBS dz
- Lack of antibodies to the TSST-1 toxin
- Compromise in mucosal or skin integrity
- Often the presence of a foreign body (Tampon*, surgical implant)
- Can occur in children with pneumonia or skeletal infection
- Blood cultures positive in
Toxic Shock Syndrome
Recurrent Staph skin infections:
- Usually MRSA (obtaining a culture is important)
- Treat everyone in family with a co-existing infection
Rx?
What Rx is still the go-to choice for therapy in children with infections due to MRSA?
Rx nasal mupirocin and bleach baths MRSA
Rx vancomycin
TQ
- Multisystem inflammatory dz that mostly affects infants and children
- Vasculitis of medium-sized extraparenchymal arteries
- MC cause of acquired heart dz in North America, Japan, and Europe
- Development of coronary artery aneurysms***
Lab findings:
- Elevated acute phase reactants (CRP, ESR, thrombocytosis, leukocytosis)
- Normochromic normocytic anemia
- Sterile pyuria
- Mild elevation of liver enzymes and bilirubin
- Mononuclear cells in the CSF
Kawasaki dz
TQ
Explain the “C.R.A.S.H.” mnemonic for diagnosis of Kawasaki dz.
The presence of unexplained fever for 5 days or more and the presence of 4 of the following 5 findings:
C - Conjunctival injections, generally B/L and bulbar w/o discharge and with sparing of the limbus
R - Rash, polymorphous and generalized, may have perineal desquamation
A - Adenopathy, non-suppurative, generally cervical, and ≥1.5 cm in size
S - Strawberry tongue, or other mucous membrane changes such as dryness and fissuring of the lips, erythema of the oral mucosa
H - Hand and feet changes, generally with swelling, periungal desquamation of the fingers and toes, erythema of palms and soles
- Fever >5 days
- 2-3 of the CRASH criteria
Incomplete or Atypical Kawasaki dz
Management of Kawasaki dz: (2)
IVIG
aspirin
What happens during a well child check?
- Check ht, wt, head circumference
- BMI @ 2yr
- BP and Sensory screening- vision @3yo (hearing @4yo)
- Develop/Behavioral Assessment- 9mo, 18mo, 30mo.
- Alcohol and Drug use @ 11yo
TQ
When do we screen children for autism and what do we use?
- 18mo and 24mo when kids start socializing and communicating
- M-CHAT: 10Q questionnaire
TQ
What do we do at EVERY well child check?
Full physical exam!!!
Labs:
- Newborn Screening: birth and w/in 1 mo (metabolic and hgb)
- Immunizations
- Hgb/Hct @ 12 mo (iron def!)
- Lead screening: 12 mo, 24 mo
- TB test
- Dyslipidemia (risk @ yo, actual 20yo)
- STI @11yo
- Cervical Dysplasia @???
11yo
Def: Inform parents what to expect developmentally and advise them accordingly (developmental changes, diet, injury prevention)
Anticipatory Guidance
TQ
T/F Growth parameters don’t have to plot out at 50% percentile for age to be normal! Instead, PICK a line on the curve and make sure they grow along that curve (even if at 3%)
TRUE
Grow at normal rate, regardless if small or big
TQ
If WEIGHT falls off first, think…(.eg, 90th percentile–>60th–>30th)
nutritional!
not getting enough calories (reflux), not absorbing calories (malab), or incr metabolic demands (CHD, Hyperthyroid)
TQ
If HEIGHT falls off first, think….
Endocrine abnormalities
TQ
If head circumference falls off first, think…
failure of primary brain growth
For nutritional deprivation, what is the 1st growth parameter to be affected? 2nd? 3rd?
Wt=1st
Lgth/Ht=2nd
Head circum=3rd (ominous)
TQ
Daily caloric requirements for a term neonate-1 yo? (kcal/kg/d)
Preterm neonate: 120-240
1-7yo: 75-90
7-12yo: 60-75
12-18yo: 30-60
>18yo: 25-30
100 (90-120)kcal/kg/day
TQ
How many kcal/ounce are in newborn formula and breast milk?
20 kcal/ounce!
TQ
Daily wt gain in gms/day?
Birth-4mo: ?
4mo-8mo: ?
8mo-12mo: ?
**Birth-4mo: 30gms/day (1 ounce)
4mo-8mo: 20gms/day
8mo-12mo: 10gms/day
TQ
Newborns may lose up to 10% of their birth wt during the first week of life…usually regain birth wt by when?
2 wks of age
If fails a screening…
repeat, further, more specific screening/testing…screen isn’t diagnostic!
TQ
What are the speech milestones?
1/4, 2/4, 3/4, 4/4 rule!
- at 1 yr age, strangers understand 1/4
- at 2 yr age, strangers understand 2/4 of what the baby says
- at 3 yr age, strangers understand 3/4
- at 4 yrs of age, should understand all speech
TQ
What is a normal BMI?
18.5-24.9
BMI or equal to 30=obese
TQ
What is the normal linear growth rate for ages 6-11 yo?
6-7cm/year (2.5 inches)
TQ
How do you estimate the adult height of a child? (2 ways)
-Double the height of the child at 2 yo
OR
-Using “mid-parental height”:
For boys…using inches
• [(dad’s ht + mom’s ht)+5] / 2
For girls…using inches
• [(dad’s ht + mom’s ht) – 5] / 2
TQ
When weight falls off first think…
nutrition
- Not enough in (emesis, no food)
- Not enough absorbed (mal-absorptive conditions)
- Higher than average caloric requirements
TQ
When length falls off first think…
endocrine
- GH deficiency
- Hypothyroidism
- Cushing’s syndrome (iatrogenic?)
TQ
When head circumference falls off first think…
- Primary failure of the brain to grow
- Severe craniosynostosis