Primary Care Flashcards
What is whooping cough?
infectious disease caused by gram negative bacterial BORDETELLA PERTUSSIS.
cough of “100 days”
transmission of whooping cough
respiratory secretions by cough or sneeze, contaminated objects
incubation period: 7-10 days
if untreated infectious for 21 days from symptom onset
immunisation for whooping cough
maternal whooping cough programme : 16-32 weeks of pregancy (upto 38)
6-1 vaccine to children aged 8,12,16 weeks
4-1 pre-school booster age 3,4 months old.
doesn’t give lifelong protection. wheens off over time
clinical features of whooping cough
catarrhal phase : 7-10 (range 4-21) after exposure. lasts 1-2 weeks. symptoms similar to urti : rhinorrhoea, malaise, mild cough, sore throat, conjunctivitis. fever is uncommon.
MOST INFECTIOUS STAGE IS CATARRHAL
Paroxysmal : 1-6 weeks (10weeks)
rapid,violent,uncontrolled coughing fits. - difficulty expelling thick mucus from tracheobronchial tree.
cough: increasing severity. worse at night (could be triggered by cold/noise) , after feeding, possible end in vomiting, associated central cyanosis.
sometimes inspiratory whoop. (short expiratory burst then inspiratory gasp)
infants spells of apnoea.
CONVALESCENT: 2-3 weeks. - gradually improves.
Diagnosing Whooping Cough - when to suspect?
suspect if acute cough lasting 14 days or more without apparent cause plus 1 or more of:
paroxysmal cough
inspiratory whoop
post-tussive vomiting
undiagnosed apnoeic attacks
suspect if clinical features plus:
- in contact with confirmed case within 21 days.
diagnosing whooping cough - lab tests
all ages: per nasal swab culture for BORDETELLA PERTUSSIS
pcr : all ages
serology : over 16
oral fluid testing (OFT) - 2-16 - test for anti-pertussis toxin immunoglobulin g (IgG). - OFT KIT SENT HOME.
IgG greater than 70 IU/ml or 70 aU
is whooping cough a notifiable disease?
YES - NOTIFY UKHSA WITHIN 3 DAYS
how would you manage whooping cough?
infants under 6 months - admit to hospital
notifiable disease - notify ukhsa
ORAL MACROLIDE:
clarithromycin (infant under 1 month)
azithromycin - child over 1 azi/clari
erythromycin - pregnant
non pregancy : azi/clari
where macrolides are contraindicated: CO-TRIMOXAZOLE. (NOT PREGNANT WOMEN OR INFANTS LESS THAN 6 WEEKS)
school exclusion: 48 hrs after abx start ( 21 days from symptom onset if no abx)
abx prophylaxis to household contacts.
complications of whooping cough
subconjunctival haemorrhage
pneumonia
bronchiectasis
seizures
pneumothrax ( increased intra-thoracic pressure bc of violent coughing)
umbilical/inguinal hernai, rectal prolapse (increased intra-abdominal pressure)
what is exanthem? (roseola infantum)
fever+ rash - nagayama spots
common disease of infancy caused by human herpes virus 6 (HHV6)
incubation period: 5-15 days.
affects children 6 months - 2 years.
no need for school exclusion
features of exanthem (roseola infantum)
high fever lasting a few days followed later by a maculopapular rash
Nagayama spots: papular exanthem on the uvula and soft palate.
febrile convulsions (10-15% of ppl)
diarrhoea and cough common
possible consequences of HHV6 infection
aseptic meningitis
hepatitis
what is gastroenteritis?
transient disorder due to enteric infection with virus, bacteria or parasites.
sudden onset diarrhoea, with/without vomiting.
could have fever, abdo pain
what is food poisoning?
illness caused by food/water consumption with bacteria.
Staphylococcus aureus
Bacillus cereus
Clostridium perfringens
travellers diarrhoea - what is it?
at least 3 loose to watery stools in 24 hrs with/without 1 or more of :
abdo cramps, fever, nausea, vomiting or blood in stool.
most common cause: e-coli
define acute diarrhoea
3 or more episodes of liquid or semi liquid stool in a 24 hour period lasting for less than 14 days .
stool takes shape of sample pot.
prolonged diarrhoea - over 14 days
define dysentery
acute infectious gastroenteritis with diarrhoea with blood and mucus
often fever and abdo pain
define antibiotic associated diarhoea
clinical infection
normal gut flora is disturbed by antibiotic use
certain strains of Clostridium difficile to grow
produce toxins
how is gastroenteritis spread?
person to person
faeco-oral
foodborne
environmental
airborne routes
viral causes of gastroenteritis
rotavirus - mc in children but reduced due to vaccine. person-to- person via faeco-oral route
symptoms: watery diarrhoea and vomiting, with/without fever, Abdo pain
vomiting settles 1-3 days , diarrhoea 5-7 days
infection in adults uncommon as immunity is long lasting
adenovirus - usually rti’s but can cause gastroenteritis in kids
norovirus - commonest cause in uk. all ages. immunity not long lasting
symptoms: 24-48 hours after infection and last for 12-60 hours
Sudden-onset nausea then projectile vomiting, watery diarrhoea. fever
headache
abdominal pain
myalgia
recovery - 1-2 days.
bacterial causes of gastroenteritis - campylobacter
Campylobacter jejuni/coli - MC - flu like prodome with abdo cramps, fever, possible bloody diarhoea, n+v.
2-3 days . happens from contaminated food, undercooked meat, untreated water, unpasturised milk
might mimic appendicitis.
comp: guillian-barre syndrome
parasitic causes of gastroenteritis
Amoebiasis - Gradual onset bloody diarrhoea, abdominal pain and tenderness which may last for several weeks
gardiasis - prolonged non bloody diarhoea
bacterial cause of gastroenteritis - staph aureus
short incubation period
severe vomiting
bacterial cause of gastroenteritis - cholera
profuse watery diarhoea
severe dehydration resulting in weight loss
not common in travellers
bacterial cause of gastroenteritis - shigella
bloody diarhoea, abdo pain, vomiting
bacterial cause of gastroenteritis - bacillus sereus
Two types of illness are seen
vomiting within 6 hours, stereotypically due to rice
diarrhoeal illness occurring after 6 hours
bacterial cause of gastroenteritis - e- coli
travellers - kids under 5
could be asx - could be bloody diarrhoea, Abdo cramps, fever, ,nausea, vomiting.
watery stools
10 days .
person-to-person via faeco-oral route, contaminated food, untreated water.
pass through home settings, school, care homes etc.
ABX CAUSE DIARHOEA
incubation period of diarhoea based on bacterium
Incubation period
1-6 hrs: Staphylococcus aureus, Bacillus cereus (6-14)*
12-48 hrs: Salmonella, Escherichia coli
48-72 hrs: Shigella, Campylobacter
> 7 days: Giardiasis, Amoebiasis
where would you typically see a venous ulceration?
just above medial malleolus
investigations of venous ulceration
ABPI - important in non healing ulcers because poor arterial flow affects healing.
less than 0.9 and more than 1.3 (indicate arterial disease due to calcification)
if less than 0.5 - severe arterial disease - compression ci’d.
if 0.5-0.8 - avoid compression
if 0.8-1.3 - then give compresssion.
management of venous ulceration
compression bandaging - 4 layer
oral pentoxifylline - peripheral vasodilator improves healing rate
small evidence using flavinoids
little evidence to suggest benefit from hydrocolloid dressings, topical growth factors, ultrasound therapy and intermittent pneumatic compression
why would you get a venous leg ulcer?
sustained venous hypertension happens because of chronic venous insufficiency due to venous valve incompetence or an impaired calf muscle pump.
risk factors for venous leg ulcers
age
obesity
immobile
limited range of ankle function
previous ulcer
personal/family hx of varicose veins/dvt
female
define syncope
transient loss of consciousness due to global central hypoperfusion with
rapid onset,
short duration
spontaneous complete recovery.
types of syncope : reflex syncope (neurallly mediated)
vasovagal - triggered by emotion, pain or stress. “fainting”
situational - cough, micturition, gastrointestinal
carotid sinus syncope
types of syncope : orthostatic syncope
primary autonomic failure - Parkinson’s, Lewy body dementia
secondary autonomic failure - diabetic neuropathy, amyloidosis, uraemia
drug induced - diuretics , alcohol, vasodilators
volume depletion - haemorrhage, diarrhoea
types of syncope - cardiac syncope
arrhythmias : bradycardias (Sinus node dysfunction, AV conduction disorders) or tachycardias (supraventricular, ventricular)
structural : Valvular, MI, hypertrophic obstructive cardiomyopathy
other: PE
how to evaluate syncope?
cardio exam
postural blood pressure reading: symptomatic fall in systolic bp >20 or diastolic >10 or decrease in systolic <90 is diagnostic.
give ecg for all pts.
patients with typical features, no postural drop and normal ecg dont require anything further.
what is postural drop?
drop in bp when you stand up after lying or sitting down.
What are varicose veins?
dilated tortuous superficial veins that occur secondary to incompetent venous valves.
allow blood to flow back, away from heart.
why do varicose veins occur in legs?
reflux in great saphenous vein and small saphenous vein.
risk factors of varicose veins
increasing age
female
pregnancy - uterus causes compression of pelvic veins
obesity
symptoms of varicose veins
aching
throbbing
itching
skin changes of varicose veins
varicose eczema - venous stasis - treat with steroid
haemosiderin deposition - hyperpigmentation
lipodermatosclerosis - hard/tight skin - champagne looking leg
atrophie blanche - hypopigmentation
complications of varicose veins
skin changes
bleeding
superficial thrombophlebitis - inflammatory process causing blood clot to form in veins.
venous ulceration
DVT
investigations for varicose veins
venous duplex ultrasound - will show retrograde venous flow
management of varicose veins
most don’t need surgery
conservative : leg elevation, weight loss, regular exercise, graduated compression stockings
possible treatments:
endothermal ablation: using either radiofrequency ablation or endovenous laser treatment
foam sclerotherapy : irritant foam causes inflammatory response by reacting with vein wall. pushes blood out of area. = closure of vein
surgery: ligation/stripping
what is chickenpox?
primary infection with varicella zoster virus.
shingles is reactivation of dormant virus in dorsal root ganglion.
how is chickenpox (v-z-v) spread?
respiratory route
caught from someone with shingles
infectivity of chicken pox (v-z-v)?
4 days before rash until 5 days after rash first appeared (crusted over vesicular rash)
incubation period : 10-21 days.
clinical features of chicken pox (v-z-v)
fever initially
itchy rash starting on head/trunk before spreading.
1st macular, then papular, then vesicular.
systemic upset - mild
management of chicken pox v-z-v
supportive
keep cool, trim nails
calamine lotion
school exclusion : 1-2 days before rash appears (infective) continues until lesions dry and crusted over (5 days after rash onset)
immunocompromised patients and newborns with peripartum exposure : give them varicella zoster immunoglobulin (VZV).
if chicken pox develops : IV ACICLOVIR (considered)
complication of chicken pox vzv
secondary bacterial infection of lesion
NSAIDS INCREASE RISK
could be single infected lesion/small area of cellulitis - in some could be invasive group a strept soft tissue infection = could lead to necrotizing fasciitis
pneumonia
encephalitis
disseminated haemorrhagic chicken pox
arthritis, nephritis, pancreatitis - rare
what type of virus is varicella zoster?
herpes virus causing chickenpox
what is shingles?
acute unilateral painful blistering rash caused by reactivation of v-z-v
types of varicella zoster vaccine
1 - stops development of primary varicella infection - chicken pox - LIVE ATTENUATED VACCINE - VARILRIX/VARIVAX
2 - reduces incidence of herpes zoster (Shingles) caused by reactivation of vzv
who would you give the primary vzv vaccine to
healthcare workers who arent immune to vzv
contacts of immunocompromised patients (child whose parents is having chemo)
who is the shingles vaccine given to?
boost immunity of elderly people against herpez zoster.
all pts 70-79
live attentuated and given sub-cut
eg: zostavax
contradindication of secondary vzv vaccine ?
immunosuppresion
side effects:
injection site reaction
less than 1/10,000 ppl get chickenpox
which drugs can cause urticaria?
aspirin
penicillin
nsaids
opiates
what is urticaria?
local or generalised superficial swelling of skin.
mc cause: allergy but non-allergic causes are seen too.
release of histamine and other pro-inflammatory chemicals by mast cells in skin
features of urticaria?
pale pink raised skin. - described as “hives,wheals, nettle rash”
pruritic
management of urticaria
non-sedating antihistamine - loratidine/cetrizine - 1st line - continue for 6 weeks following episode of acute urticaria
sedating antihistamine - chlorphenamine - night time use - in addition to daytime one - if troubling sleep symptoms.
prednisolone - severe or resistant episodes
chronic urticaria: fexofenadine
uti’s in children - who is it more common in ?
until 3 months - boys more than girls bc of congenital abnormalities.
after 3 months - girls
presentation of uti based of age of child?
infant - poor feeding, vomiting, irritable
younger child - abdo pain, fever, dysuria (pain/buring/stinghing of urethra)
older child - dysuria, frequency, haematuria
what features would suggest an upper uti in a child?
temperature over 38 degrees
loin pain/tenderness
what are the nice guidlines for checking urine sample in a child?
check if any symptoms or signs suggestive of uti
with unexplained fever of 38 or higher - test urine after 24 hours at latest
with alternative site of infection but still unwell
how to collect urine in a child suspecting uti?
clean catch
if not : urine collection pads
if not: suprapubic aspiration
cotton wool balls, gauze, sanitary towels not suitable
how would you manage uti in children?
infant less than 3 months: refer immediately to paeds
over 3 months with upper uti : admit to hospital.
if not: oral abx like cephalosporin or co-amoxiclav 7-10 days
over 3 months with lower uti : oral abx for 3 days.
trimethoprim, nitrofurantoin, cephalosporin, amoxicillin.
bring child back if still unwell after 24-48 hrs.
abx prophylaxis not given after 1st uti but consider in recurring cases.
causes of uti in children
check for causes and damage to kidneys
causes:
e-coli (80%)
proteus
pseudomonas
predisposing factors for utis in children
incomplete bladder emptying:
- infrequent voiding
- hurried micturition
- obstruction by full rectum due to constipation
- neuropathic bladder
vesicoureteric reflux - flow of urine from back to ureters due to defective valves - high risk of kidney infection - upper uti
poor hygiene - not wiping from front to back in girls
what is vesicoureteric reflux?
abnormal backflow of urine from bladder into ureter and kidney.
common abornmality of urinary tract in kids.
35% of children develop renal scarring.
pathophysiology of vur - vesicoureteric reflux
ureters displaced laterally, entering bladder in a perpendicular fashion
shortened intramural course of ureter
vesicoureteral junction cant function adequately
primary : usually ureter has a long tube into the bladder and when the bladder fills the ureter is closed so no backflow. but here, the ureter tube is shorter so when the bladder fills the tube isnt closed and you get backflow.
secondary: obstruction in urinary tract. - increase in pressure.
due to recurring uti - ureter swell and close
-posterior urethral valve disorder
-flaccid neurogenic bladder - bladder cant contract to release urine.
possible presentations of vur - vesicoureteric reflux
antenatal period - hydronephrosis on USS
recurrent childhood UTI
Reflux nephropathy:
chronic pyelonephritis secondary to VUR
commonest cause of chronic pyelonephritis
renal scar may produce increased quantities of renin causing HTN
investigations of vesicoureteric reflux
Micturating cystourethrogram
dmsa scan - renal scarring
grading of VUR - vesicoureteric reflux
grade 1 - reflux into ureter only, no dilation
2 - into renal pelvis on micturition, no dilation
3 - mild/moderate dilation of ureter , renal pelvis and calyces
4 - dilation of renal pelvis and calyces with moderate ureteral tortuosity
5 - gross dilation of ureter , pelvis, calyces with ureteral tortuosity.
what is acute pyelonephritis?
type of UTI where 1/2 kidneys get infected
caused by ascending infection - e.coli fromm lower urinary tract.
could also be due to bloodstream spread of infection - SEPSIS
Clinical features of acute pyelonephritis
fevers, rigors,
loin pain
nausea, vomiting
symptoms of cystitis: dysuria, urinary frequency
investigations of acute pyelonephritis
mid-stream urine before starting abx
management of acute pyelonephritis
hospital admission considered
local abx guidlines
bnf recommend: broad-spectrum cephalosporin or a quinolone (for non-pregnant women) for 7-10 days
clinical features of uti (lower) in adults
dysuria
urinary frequency/urgency
cloudy/offensive smelling urine
lower abdo pain
fever: low grade in lower uti
malaise
in elderly patients, acute confusion
investigations for uti (lower) in adults
urine dipstick for :
women under 65, with no risk factors for complicated uti.
dont use for men, pregnant, catheterised.
urine culture for :
women over 65
recurrent uti (2 episodes in 6 months or 3 in 12 months)
men
pregnant women
visible/non-visible haematuria
what should you expect to see in uti (lower) in adults - urine dipstick?
positive for nitrite or leukocyte and rbc = uti likely
negative for nitrite and positive for leukocyte = uti just as likely as another diagnosis
negative for both = uti less likely
what are the lower urinary tract symptoms in men? (LUTS)
over 50
mc - secondary to BPH or prostate cancer.
voiding - hesitancy, poor or intermittent stream, straining, incomplete emptying, terminal dribbling
storage - urgency, frequency, nocturia, urinary incontinence
post micturition - dribbling. sensation of incomplete emptying
how would you examine for lower urinary tract symptoms in men ?
urinalysis - exclude infection = check for haematuria
digital rectal exam - size and consistency of prostate
PSA - possibly, but patient should be counselled first.
get the patient to:
urinary frequency-volume chart: distinguish between urinary frequency, polyuria, nocturia and nocturnal polyuria.
international prostate symptom score (IPSS) : assess impact on patients life. classify symptoms as mild, moderate, severe.
management of lower urinary tract symptoms in men - voiding symptoms
conservative measures: pelvic floor muscle training, bladder training, prudent fluid intake and containment products
if moderate or severe : alpha-blocker
if enlarged prostate and patient high risk of progression, 5-alpha reductase inhibitor offered
if enlarged prostate and moderate/severe symptoms give both alpha blocker and 5-alpha reductase inhibitor
if mixed symptoms of voiding and storage not responding to alpha blocker then antimuscaranic (anticholinergic) drug can be added.
management of lower urinary tract symptoms in men - overactive bladder
moderating fluid intake
bladder retraining poss
antimuscarinic drugs if symptoms persist. oxybutunin (immediate release), tolterodine (immediate release), darifenacin (once daily preperation)
mirabegron if 1st line drugs fail
management of lower urinary tract symptoms in men - nocturia
advise on moderating fluid intake at night
furosemide 40mg in late afternoon poss
desmopressin may be helpful