Difference between revisions of "Onchocerca - Cattle"

From WikiVet English
Jump to navigation Jump to search
(12 intermediate revisions by 3 users not shown)
Line 1: Line 1:
{{OpenPagesTop}}
+
*Filarial nematode (white thread-like, <6cm long)
{{Taxobox
+
*Found in ligamentum nuchae and gastrosplenic ligament (UK), skin and muscle (overseas)
|name              =''Oncocerca spp.
+
*Indirect life cycle (intermediate hosts: black fly, [[Simuliidae|‘’Simulium’’]] species and biting midge, [[Ceratopogonidae|‘’Culicoides’’ species]])
|kingdom            =
+
*Little or no significance (UK); subcutaneous and intramuscular nodules may cause economic loss due to carcass trimming (overseas).[[Category:Filarioidea]]
|phylum            =
 
|class              = [[Nematodes|Nematoda]]
 
|sub-class          =
 
|order              =
 
|super-family      = [[Filarioidea]]
 
|family            =
 
|sub-family        =
 
|genus              =
 
|species            =
 
}}
 
 
 
==''Onchocerca gutturosa''==
 
 
 
Also known as: '''''Onchocera lienalis — Ligamentary onchocercosis
 
 
 
===Hosts===
 
'''Intermediate hosts''': Blackflies
 
 
 
'''Definitive hosts''': Cattle
 
 
 
===Identification===
 
''O. gutturosa'' are thin, white worms.  The females are capable of growing up to 60cm in length. The males are considerably smaller at around 4cm in length.
 
 
 
===Life Cycle===
 
Microfilariae are found on the surface of the host. [[Simuliidae|Blackflies]] feed and ingest the microfilariae. These develop and mature into L3 larvae. The blackflies then feed on another host, which becomes infected.
 
 
 
==Onchocerca gibsoni==
 
===Hosts===
 
 
 
'''Intermediate hosts''':  Midges ([[Ceratopogonidae|''Culocoides'']])
 
 
 
'''Definitive hosts''':  Cattle
 
 
 
===Identification===
 
''O. gutturosa'' are thin, white worms ranging from 2-20cm in length. The microfilariae are around 260μm in length.
 
 
 
===Life Cycle===
 
As for ''Onchocera gutturosa''.
 
 
 
{{Learning
 
|flashcards = [[Cattle_Nematode_Flashcards|Cattle Nematode Flashcards]]
 
|literature search =[http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=Onchocerca&occuring1=title&rowId=2&options2=AND&q2=cattle&occuring2=od&rowId=3&options3=AND&q3=&occuring3=freetext&x=46&y=9&publishedstart=yyyy&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all ''Onchocerca'' spp. in cattle publications]
 
}}
 
 
 
 
 
{{OpenPages}}
 
 
 
[[Category:Filarioidea]]
 

Revision as of 21:14, 21 April 2010

  • Filarial nematode (white thread-like, <6cm long)
  • Found in ligamentum nuchae and gastrosplenic ligament (UK), skin and muscle (overseas)
  • Indirect life cycle (intermediate hosts: black fly, ‘’Simulium’’ species and biting midge, ‘’Culicoides’’ species)
  • Little or no significance (UK); subcutaneous and intramuscular nodules may cause economic loss due to carcass trimming (overseas).