Changes

{{Taxobox

{{Taxobox

|name               =Ostertagia spp.

|name =Ostertagia spp.              

|kingdom           =Animalia

|kingdom =Animalia            

|sub-kingdom       =

|sub-kingdom =        

|phylum             =Nematoda

|phylum =Nematoda            

|super-class       =

|super-class =        

|class             =

|class =              

|sub-class         =

|sub-class =          

|super-order       =

|super-order =        

|order             =

|order =              

|sub-order         =

|sub-order =          

|super-family       =[[Trichostrongyloidea]]

|super-family =[[Trichostrongyloidea]]      

|family             =

|family =            

|sub-family         =

|sub-family =        

|genus             =Ostertagia

|genus =Ostertagia              

|species           =''O. osteragi''

|species =''O. osteragi''            

}}

}}

==''Ostertagia ostertagi''==

==''Ostertagia ostertagi''==

{| cellpadding="5" cellspacing="0" border="1"  

{| cellpadding="5" cellspacing="0" border="1"  

| Also known as:

| Also known as:

| ''O. ostertagi''

| ''O. ostertagi''

|-

|-

|}

|}

These worms are found throughout the world, and are considered the most important parasite of cattle, especially in temperate regions. The primary host is cattle but they can also be found in deer and goats occasionally.  

These worms are found throughout the world, and are considered the most important parasite of cattle, especially in temperate regions. The primary host is cattle but they can also be found in deer and goats occasionally.  

====Identification====

====Identification====

==''Teladorsagia (Ostertagia) circumcincta''==

==''Teladorsagia (Ostertagia) circumcincta''==

{| cellpadding="5" cellspacing="0" border="1"  

{| cellpadding="5" cellspacing="0" border="1"  

| Also known as:

| Also known as:

| Sheep brown stomach worm

| Sheep brown stomach worm

====Identification====

====Identification====

Adult worms have a common ostertagia appearance, slender, reddish in colour with a short buccal capsule. The worms are very short, males 6-8mm, female 8-10mm. Microscopically male ''T. circumcincta'' worms have well developed lateral lobes of the bursa and long thin spicules. In females a vulval flap is present, the tail is transversely striated and tapers to a fine rounded tip.

Adult worms have a common ostertagia appearance, slender, reddish in colour with a short buccal capsule. The worms are very short, males 6-8mm, female 8-10mm. Microscopically male ''T. circumcincta'' worms have well developed lateral lobes of the bursa and long thin spicules. In females a vulval flap is present, the tail is transversely striated and tapers to a fine rounded tip.  

There are two morph species of ''T. circumcincta''; ''T. davtiani'' and ''Ostertagia trifurcata'', both of which have slightly different microscopic appearances to the ''T. circumcincta''. In males the bursa is longer in both species and the spicules, shorter and broader.  

There are two morph species of ''T. circumcincta''; ''T. davtiani'' and ''Ostertagia trifurcata'', both of which have slightly different microscopic appearances to the ''T. circumcincta''. In males the bursa is longer in both species and the spicules, shorter and broader.  

====Life Cycle====

====Life Cycle====

[[Category:Trichostrongyloidea]]

[[Category:Trichostrongyloidea]]

[[Category:Cattle Nematodes]]

[[Category:Cattle Nematodes]]

[[Category:To_Do_-_NickJ]]

[[Category:To_Do_-_NickJ]]