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Summary of 2 pages for the course Veterinary Parasitology at RVC (BVM2 notes!!)

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September 14, 2025
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2025/2026
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Bovine PGE


ABOMASA
:




NEMODES mainly Ostertagia
·




lifecycle 13 overminter on
pastine
Telo 1st season
grazing
Sheep Haemonchus Trichostrongylus dorsagia Ostertagia , calves
in
:
Type I : summer
·

, ·

,

hatching
Cow Ostertagia (Hamanches Trichostrongylus) , disease when
Lifecycle eggs 21-14> adult larreal development
Type2 arrested
·




: :
: ,


(3 is infective
·




in New Year
the
grazing
season



PGagia
but called parasitic gastroenteritis
immunity developed
nematode disease is aver


·


Ruminant Gl nematodes :
circumcinta
epidemiology + pathogenesis
like Ostertugia life cycle




minut
·
-
similar ,


Sheep lambs
·


causes teladorsagiosis in
appetite loss



Abomasum
loss,
abomasum causes diarrhea , weight I
during
-
adult worms in
grazing
sheeptemperate regions) lambs
·




PGE
of in ,

TypeI diseases Most common cause


Season (July-September
Cooperia Coopera Type & Carrested larral emergence) : Lambs I years old
, after I May),
grazing seasonJanloss signs
form Intermittent diard
progressive might
hustenyylus
.


,

spring typically
scree
styla
more
.




seen in
,
Small Intestine
idemiology efente
:
Bunostomum Bunostomum

Oesuphagostomum previously grazed
3
disease
Large Clean pasture not
Oesophagostemum




~
intestine
fical
Chaberia COT periparturient in eggs
Chabertia timmre =

Spring lambing occurs pregnancy
·



:

Trichuris
,




(4 number of shed eggs)
their ↑ L3




3i
Lumbs LE shed own eggs =

pick up
·




Trichostrongylus pasture-est
,




contamination
IIII ·
main source
of on clean
Ostertagia/Telodursagia
1




trichostronglylosis"
/
Il
similar to April MJrne

lambAug Seeng count
·
-




·




Trichustengyls axei Cabumasum) + Trichostrungylus <pp (small
.




intestine)
----


pastie
pastine previous stocking
on some
contaminated
:

abomasum/intestines
of Trichostrgylus
- in
> different species
·




< /years
by sheep
Lambs calves
1)
type 2-still type
,

1 CNOV-DEC) chat
overwintering perparturient
rise
end
of grazing
season
scoor")
·




("black
+
diarrhea weight loss
Clinical signs dark , furl-smelling in 13
,
:

adverse conditions
of contamination
·




survive
·




eggs in environment can main source




new
from eves + lambs

Haemonchus contentsa
identification HUT acronym
x
curses "huemonchosis Abomasal worm
:


lives in abomasum




3
large
epidemiology
·




Tropics 1 Haemonds contentos
Zom long ↓
.




egg-13 very fast hot humid conditions circumcinate
·




in females only
in

fresh . Ostertugia/ Telocorsagia
·




when
,
2
"Barber's pole" appearance several cyclesannually
3 Trichestengylus
axei small
intestinal tract twisted
around pale disease otbecks dependent rainfall on


Spink blood-filled
.




reprotract) survive dry periods by arrested development

tropical/sub-tropical parasite Temperate epidemiology
L4 I annually Cautumnsource
blood-sucking
: piercing
lancet in bocal capsule of cycle
adult stages 0 05m// day which eve-primary infection
worm removes
paste CL3)/
>
- .




few overwinter on

overtime = anemic
a ingested larvae
arrested till following
lost suddende

·30000Wormslitblood
=



spring
Typically
cause Type I synchume
arrested larrue)
Cemerging
SMALL INTESTINE
Nematodiorosis
Sheep Nematodins Trichustengylus
:
·




form of PGE
,


·


Cow Corperia
: Nematodirus ,
·


severe

G-10 weeks old
·

lambs : early grazing ,




important
Season(April-June) ( sudden on set of prefuse Epidemiology
Nematudios eggs in lamb feces when
must Clinical signs
diarrhea
(black/green s pale yellows colourless)/ not
many
showing
before adult stage
Nematodirus spp napid dehydration , death (30%) . not adults. . . larvae cause pathology
many
.




several species also disease in 1 season calves L-13 occurs in
egy
(doesn't hatch) >
-

egg-hatching requires long
live in small intestine
period of cold followed by a mean day/ night temperature of
only Nematodious battus causes actex futal diseuse
> 10%
minimal contribution
·

Adult 2cm :
,
cotton wood appearance (many) ,
thin
·

lamb-lamb disease , eves
have

PPP 15 days (short) line normal, 13
·



: D
m lamb
·



queen
tempt
=


Identification hatch




·
as

(strongyles
sumbfeclegg conthutch
=

all similar
strungyle eggs look
*
I
·
·




hookworms)
Hrichustrongyloidea strongyloiden a
typicastrongy
,
,



larger than stringyle eggs
·




ene role
=oral-shaped no
·

=

·




Non-pathogenic Nematodirus spp .




N battus straight sides + brownish color
. =




Jan AMJ S 0 D
R174,30
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