"Laurie" <laurieTHE_t.RemoveThis@verizonTRASH.net> wrote in message
news:LxxAj.1924$HA3.924@trnddc02...
>Stewart is about 5 years old and is a spayed female diagnosed with
>tick-borne illness at age 2 prior to being adopted by bf.
After 2 mo of chronic diarrhea <snip>
> a diagnosis of GI histoplasmosis subject to a lab review based on his view
> of slides from bowel scraping.
He has treated
> regularly with Frontline and periodic doxycycline course to manage
erlicchia
> (sp?). Last vet JUST prescribed 100mg doxycycline 2x per day which
> specialist just reduced to 1x per day.
........I'm confused here. Dog was diagnosed with Ehrlichia 3 years ago? I
hope you went to the Tick List that Celeste suggested as you need some
expert answers on this question. Periodic administration of doxy won't do
it I think. Dog needs at least a month or more on doxy at appropriate dose,
which apparently is much higher than a lot of vets realize. Then there is
the issue of whether or not the dog still has Ehrlichia. What does your
dog weigh?
http://www.minden.com/nowhereelse/canine_tick_disease.htm
*Important! Here is the treatment your dog should be given for
Ehrlichiosis or Lyme disease.
Doxycycline, a semi-synthetic tetracycline, is the drug of choice, the most
effective against Ehrlichiosis and Lyme. It is given at 10 milligrams per
kilogram (1 kg = 2.2 lbs.) of the dog's body weight every twelve hours for
six to eight weeks. Another way to figure this, on the basis of pounds, is
5 mg. per pound of body weight. The result for the dog is exactly the same
as doxy comes in 100 mg. tabs and the result of figuring in milligrams is
usually adjusted up accordingly. If nausea is a problem, you can divide the
dose further, as long as the dog gets what he needs in any twelve hour
period.
This is twice the amount recommended in the Merck Veterinary Manual and is
given for a longer period of time than the VMM recommends; however, vets who
deal with tick disease all the time say that the higher doses and longer
administration are successful far more often in treating this disease and
preventing its recurrence.*
> In last week, dog has become progressively weaker and is now vomiting and
> experiencing back end weakness. No respiratory distress or findings.
> Abdominal sonogram found nothing. All blood work is within range EXCEPT
for
> severe anemia (count about 23) doctor does not feel warrants transfusion
> quite yet. Last night he put her on cottage cheese/white rice/chicken
diet
> 3-4x per day and 1/2 immmodium a-d tablet 2x/day.
Questions: does this sound like a "going to
> get worse before she gets better thing after changing diet" thing? Does
> anyone have experience with severe GI histoplasmosis treatment that might
be
> helpful?
.......If this dog has Histo she needs to be on an anti-fungal ASAP. Doxy is
not going to take care of a fungus. When is the path report due? Any way
you can hurry it up? A bit of research below on various topics. Other
questions I'd have which I didn't research: long term off and on doxy -
what are the side effects?; any chance dog also has concommitant infection
with Babesia or other infectious non-fungal organism?; does GI histo presume
systemic histo? I'd also do a good search on the drugs used for histo -
side effects, etc. Apparently these fungal drugs can be hard on the liver,
so frequent chem panels might be in order.
This dog had ehlichia, Histoplasmosis and lymphoma. Not meant to scare you
(as I doubt lymphoma is an issue), but since it came up on an initial search
on Ehrlichia and I was wondering about Ehrlichia weakening the system enough
for fungal infections to occur.
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1800954
B-cell lymphoma in a dog with ehrlichiosis (Ehrlichia canis) and systemic
histoplasmosis (Histoplasma capsulatum)
Fungal infection in dog with Ehrlichia:
http://www.vetpathology.org/cgi/content/full/43/6/988
Top paper on this page says (in first few months at least) immunosuppression
is not a problem with Ehrlichia. Don't know if that holds true if the
Ehrlichia is chronic:
http://lib.bioinfo.pl/pmid:16169601
I was really wondering if there was such a thing as GI Histo. Apparently it
can be primary infection site in dogs:
http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/51108.htm
Infection is commonly via aerosol contamination of the respiratory tract,
and the lungs and thoracic lymph nodes are the sites of primary infection,
although the GI tract may be a primary site of infection, especially in
dogs. The organisms enter the bloodstream from a primary focus and become
disseminated throughout the body;
I wonder if this dog still has Ehrlichia. The first paper I listed mentions
that due to antibody presence for a long time after infection , it's
impossible to tell from usual ELISA tests for this disease. It mentions
that systemic Histo and Ehrlichia can be definitively identified in the body
through bone marrow tests.
Or there is apparently a DNA test available. This site assumes lung
involvement.
http://www.healthgene.com/vet/d413.asp
Histoplasma capsulatum can be cultured from tissue specimens, fine-needle
aspirates, and body fluids by specialized laboratories but the process may
take anywhere from 7 to 10 days. The newest generation of DNA diagnostic
tests are much more rapid (2-3 days) then conventional methods, and avoid
the problems associated with serological testing since antibodies are not
used. A DNA test for the detection of Histoplasma capsulatum in a sample is
now available. This test offers veterinarians a sensitive, accurate and
rapid means of detecting Histoplasma capsulatum, and confirming infection
Here's a report of GI histo. I note that they say they find Histo like
organisms. I don't think a histopathology sample can definitively diagnosis
this without culturing. It can be highly presumed I guess:
http://www.tanuvas.tn.nic.in/tnjvas/vol2(4)/11.pdf
HISTOPLASMA COLITIS IN A DOG - A CASE REPORT*
Diagnosing bowel disease:
http://www.antechdiagnostics.com/clients/antechNews/1999/4-99.htm
Excellent paper describing Histo, symptoms, treatment. They cultured
fungus.
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1899848
The treatment of choice for disseminated histoplasmosis is itraconazole, but
ketoconazole can be used if the side effects of itraconazole preclude its
use. If the clinical signs are severe, debilitating, or life-threatening,
amphotericin B therapy can be combined with itraconazole for the first few
days for improved effect (4). Antifungal therapy should be continued for at
least 60 d, or until 1 mo past resolution of clinical signs (5). As with any
infectious disease, corticosteroid therapy is contraindicated in cases of
disseminated histoplasmosis, as the immunosuppressive effects of these drugs
may lead to worsening of the disease
A dog with cutaneous Histo took 6 months on anti-fungal meds to resolve:
http://www.ava.com.au/avj/may97/362.htm
Infectious causes of anemia (geez this vet's pix looks like a mug shot!):
http://www.vin.com/proceedings/Proceedings.plx?CID=WSAVA2002&PID=2594
........Would appreciate your posting back and keeping us up to date on
findings and treatment. Hope you can get proper diagnosis quickly and meds
to take care of it. If Ehrlichia, dog may need different meds if she has
had it for 3 years.
buglady
take out the dog before replying
>> Stay informed about: Urgent - histoplasmosis familiarity?