RoundWorms Flashcards
morphology of adult round worms
medium sized up to 40cm
rigid
spindle shaped
white opaque
no buccal capsule
3 lips
no bursate in males
morphology of roundworm eggs
ovoid, thick shelled(3) layers
location of roundworms
small intestine
ascaroid
small intestine –> liver –> lungs –> trachea –> pharynx —> small intestine
toxocaroid
small intestine –> liver –> lungs –>blood
ascaridioid
moults in mucosa of small intestine
no migration
infection routes of roundworms
po
prental and lactogenic
cause of equine parascariosis
parascaris equorum
morphology of equine parascariosis
20-40cm
rigid
life cycle of equine parascariosis
direct
PE2 ascaroid
prepatent period of equine parascariosis
10-12weeks
clinical signs of equine parascariosis
cough
nasal discharge
anorexia
dullness
colic
weight loss
nervous signs
diarrhoea
worms in faeces
necrscopy of equine parascariosis
catarrhal enteritis
invagination
occlusion of small intestine
rupture of intestinal wall
peritonitis
haemhorrhage
imflammatory foci
nodules contating dead larve in liver
cause of bovine toxocariosis
toxocara vitulorum
morphology of bovine toxocariosis
15-30cm long
white/transparent
host of bovine toxocariosis
cattle
buffalo
sheeo
goat
life cycle of bovine toxocariosis
direct
PE2 toxocaroid
clinical signs of bovine toxocariosis
changing appetite
decreased growth rate
abdominal spasm
diarrhoea
strong butyric or acetone like odour
worms in faeces
when is there worms in faeces for flotation in bovine toxocariosis
<4month old calf
necroscopy of bovine toxocariosis
catarrhal enteritis
acetone smelling meat
cause of porcine ascariosis
ascaris suum
morphology of porcine ascariosis
15-40cm
long, rigid
white
life cycle of porcine ascariosis
direct
PE2 ascaroid type
prepatent period of porcine ascariosis
8-9weeks
host of porcine ascariosis
pig, wild boar
clinical signs of porcine ascariosis
cough
dyspnoea
anaemia
anorexia
worms in faeces
false +ve faecal exam in porcine ascariosis
due to coprophagy
necroscopy of porcine ascariosis
catarrhal enteritis
roundworms in gut
cloudy whitish spots on liver
haemorrhage in lung
pneumonia
ascaridiosis cause
ascaridia galli
a. columbae
a. dissimilis
morphology of a. galli
5-12cm
morphology of a. columae and a. dissimilis
3-7cm
life cycle of ascaridiosis
direct
pe2 ascaridiosis
host of a. columbaee
pigeon
host of a. dissimilis
turkey
host of a. galli
fowl
turkey
duck
game birds
clinical signs of ascaridiosis
dull feather coat
curtailment of food
catarrhal enteritis
intestinal occlusion
decreased egg production
nervous signs
necroscopy of ascaridiosis
catarrhal haemorrhae croupous enteritis
toxocarosis
toxascariosis cause
toxocara canis
toxocara cati
toxocaris leonina
morphology of t. canis
10-18cm
morphology of t. cati
3-10cm
morphology of t. leonina
6-10cm
life cycle of t. canis
pe2 is ascaroid under 2 months
and toxocaroid over 4 months
life cycle of t. cati
ascaroid and toxocaroid
pe2 of t. leonina is
ascaridoid
host of toxocarosis
toxascariosis
dog, fox, cat
clinical signs of toxocarosis
toxascariosis
intermittent diarrhoea
changing appetite
pot belly
anaemia
weight loss
dull coat
cough
worms in vomit and faeces
nervous signs
necroscopy of toxocarosis
toxascariosis
small intestine filled with worms
enteritis
obturation
invagination
haemorrhage and inflammation in lungs
heterakiosis cause
heterakis gallinarum
h. dispar
h. isolonche
morphology of heterakiosis
0.7-1.5cm
long white
host of h. gallinarum
guinea fowl
turkey
pigeon
pheasant
host of h. dispar
duck, goose
host of h. isolonche
pheasant
wild bird
clinical signs of heterakiosis
diarrhoea
unthriftness
necropscopy of heterakiosis
haemorrhage
thickened caecal mucosa
verucous typhlitis with nodules
parascaris equorum egg
90-100um
spherical
yellowish brown
thick shelled with pitted surface
t. vitulorum egg
70-90um
brownish
thick shelled
outer pitted coat