Hallo,
meinst Du diesen Artikel? Ich lese diese zwar, verfalle jedoch nicht gleich in eine Paniksituation... weiß ich doch, wer sie geschrieben hat.
Eine Entwurmung, wie ich es bereits des öfteren gelesen habe, nämlich alle zwei Monate bei einem unveränderten, geringen Infektionsdruck halte ich persönlich für fahrlässig!! Meine persönliche Meinung: Lieber die Weide, Paddock und Box sauber halten sprich Kotabsammeln, Geilstellen ausmähen, Kotproben nehmen etc. als ständig den Pferden Gift verabreichen! Das schadet dem Imunsystem mehr als es nutzt!
Cushings horses more prone to parasite infection
May 29, 2010
Horses suffering from Cushings disease are more susceptible to parasitic infection, a study has revealed.
One of the PPID horses from the study showing the winter coat still present in summer. © Dr Dianne McFarlane
The findings of the research has implications for controlling worms in horses with the pituitary gland disorder. Affected animals could also pose a greater risk to pasture hygiene if not properly managed, the researchers said.
The study at Oklahoma State University looked at the effect of Cushings - pituitary pars intermedia dysfunction - and age on faecal worm egg counts and the time for eggs to reappear in dung after deworming.
Dr Dianne McFarlane and colleagues compared the response to dewormers on faecal egg counts in healthy horses and those with Cushing's disease.
Twenty-nine healthy horses, ranging 4 to 35 years, and 13 horses with Cushings, aged 13 to 33 years, were used in the study.
The presence or absence of Cushings was confirmed by clinical signs and a plasma test.
The researchers performed faecal egg counts at two-week intervals before and after treatment with ivermectin.
At two and four weeks after treatment with ivermectin, all horses in the study had negative faecal egg counts.
However, horses with Cushings had higher egg counts than did healthy horses, both before and at six to 12 weeks after treatment.
This difference could not be explained by the Cushings horses being older than the control horses, as the researchers found no correlation between age and faecal egg count.
A faecal egg count greater than 200 eggs per gram is often taken as an indication that deworming is required.
In this study, six of the 13 horses with Cushings reached the 200 eggs per gram threshold by 10 weeks after ivermectin treatment.
In contrast, only two of the 25 control horses had reached the threshold at the same time - a difference that was statistically significant.
"Given similar environmental conditions, horses with [Cushings] were more likely to have higher faecal egg counts than were healthy horses," McFarlane reports.
The findings suggest that horses with Cushings may pose a risk for pasture hygiene if not managed properly.
On the other hand, age alone does not appear to increase the horse's susceptibility to parasitism. However, the researchers pointed out that only a small number of horses were involved in that analysis.
More work is required to confirm that older horses do not need treating differently to younger horses when it comes to deworming.
Fecal egg counts after anthelmintic administration to aged horses and horses with pituitary pars intermedia dysfunction.
D.McFarlane, GM Hale, EM Johnson, LK Maxwell
J Am Vet Med Assoc (2010) 236, 330-334
Equine Science Update