PARASITOLOGY
out with the faeces; and (2) anapolytic — the proglottids are detained and the eggs are released through a uterine pore. 3.8.3.4 ...
3.8.3.6 The muscle structure Beneath the tegument are two layers of myoblasts, muscle cells with lateral fibre-like out- growths ...
The cestodes are protandrous and it is thought that the cross-fertilisation takes place between proglottids. n 3.8.4 CESTODE LIF ...
larvae develop into. (Metacestode is the term now most commonly used but there are some dissenters who claim that the use of the ...
n Cysticercus (Commonly known as a bladder worm)This a fluid-filled cyst containing a single invaginated scolex and normally onl ...
n Aspidogastrea are endoparasites with the entire ventral surface forming an adhesive organ. n Monogenea are ecto-parasites of p ...
caecum may have many smaller branches extending out of it. The inner surface of the gut, the gastrodermis, both absorbs food and ...
somatic or body cells of the miracidium; and the germ cells which give rise to the next larval generation. A miracidium hatches ...
n 3.11 NEMATODES General characteristics: n All nematodes have a non-segmented cylindrical body. They are triploblastic with a f ...
Males are smaller and possess copulatory aids. The male gonads consist of testes lead- ing into a tube, the vas efferensand then ...
n 3.11.4 LIFE-CYCLE The eggs hatch into a first stage larva. This moults into a second stage larva. There are usually four moult ...
Question 3.3 What is the difference between a coelomate and an acoelomate animal? Question 3.4 Name the different organs normall ...
Question 3.6 What types of musculature do nematodes have? Question 3.7 Describe the nervous system and sense organs associated w ...
PARASITE EXAMPLES GROUPED ACCORDING TO LIFE-CYCLE Nearly every vertebrate is infected with a parasite at some stage of its life. ...
PARASITOLOGY desiccation. Apart from causing a ‘itchiness’ in the anal region and slight behavioural problems, the parasite has ...
PARASITE EXAMPLES GROUPED ACCORDING TO LIFE-CYCLE A general increase in the number of eosinophils (eosinophilia) and the serum a ...
PARASITOLOGY swallowed, end up in the gut where the larvae hatch out and then proceed to undergo the migratory phase. All ascari ...
n The larvae that migrate into the striated muscles eventually become ‘encysted’. The muscle cells that surround the parasite, t ...
PARASITOLOGY Female worms in gut Free-living soil larvae Infective larvae penerate skin Dormant L 3 larvae activated during preg ...
n Once the bitch becomes pregnant her hormones reactivate the larvae which then migrate into the foetuses via the placenta. Pupp ...
«
1
2
3
4
5
6
7
8
»
Free download pdf