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#11213 - 02/18/04 09:12 AM Re: My chickens have Mycoplasma G and S, now what?
Raven Offline

Registered: 09/12/03
Posts: 121
Loc: Canada
Thanks mare and others!
Boy, I understand Croston's words about HATING to go into the coop, for fear of hearing the dreaded sneeze. Oh, isn't she EVER right!
I hold my breath every morning, listening...
And do I EVER understand those who say "all or nothing"- cull all and start again.
It's sure occured to me...but I NEED my laying hens!
Can't replace them, even stock bought in the spring won't lay till Nov or Dec. and we need those 6 or 7 or 15 eggs a day.
If it would just warm up- just for a few days, I'd get all the asymptomatic birds out of that coop, do a reverse quarantine and put all the healthy ones in one place, and watch for more signs.
Despite 5 days of i/m antibiotics, one of my laying hens continues to sneeze.
She also is one big pet, coming out and running around in the sun and snow, dusting in the horses stalls. She's certainly "healthy" for an unhealthy bird. Argh.
And there's 3 ravens (hence my name) taken up residence here in the trees by the barn. They think they are chickens, very friendly and just "one of the girls", lol. They keep hawks away, so I tolerate them in the yard. Could they be spreading this?
Well, enough for now, the saga continues.

#11214 - 02/26/04 04:49 AM Re: My chickens have Mycoplasma G and S, now what?
Spotted Crow Offline
Ruler of the Roost

Registered: 07/24/03
Posts: 855
Loc: Massachusetts
Unless your friendly neighbourhood ravens are in with your girls, I don't think that they would be spreading it. They're not usually friendly with chickens. My crows have a disappeared since I got my girls.(bummer) Keep us posted.

#11215 - 02/26/04 06:37 AM Re: My chickens have Mycoplasma G and S, now what?

The way wild bird populations spread disease to your flock, spottedcrow, isn't by visiting with them and chumming around with them.

Wild birds spread diseases by dropping in to eat some spilled grains and pooping there where your chickens are and leaving their feather dander around.

#11216 - 02/26/04 10:13 AM Re: My chickens have Mycoplasma G and S, now what?
Raven Offline

Registered: 09/12/03
Posts: 121
Loc: Canada
Thanks, Leee- that's exactly it.
We have a pretty large wild bird population, and they know where the free meals are. They'll go thru the litter and manure I've dumped, and of course when the chickens go out, they scratch thru that, too.
We're so snowed in, I can't dump the manure far enough away to prevent cross contamination...

To make matters worse- my rooster's tests came back positive for Newcastle disease- I'm assuming not a virulent strain, as nothing has died or even shown signs other than respiratory symptoms, never more than one or 2 at the same time. I thought he was vaccinated for it...
They haven't sent the cavalry in to destroy my flock, or even suggested it, so I'm not sure whether this is somewhat "normal" or not...

#102533 - 02/27/12 11:33 PM Re: My chickens have Mycoplasma G and S, now what? [Re: Raven]
kathyinmo Offline
New Egg

Registered: 11/02/10
Posts: 2
Loc: Missouri
I know this is an old thread. But, I am researching for a friend. Could you tell me the outcome of your experience, please.

Thank you.

#102534 - 02/28/12 03:10 PM Re: My chickens have Mycoplasma G and S, now what? [Re: kathyinmo]
Wieslaw Offline
Classroom Professor

Registered: 09/18/09
Posts: 3751
Loc: Denmark
Welcome to the coop. According to the member list, this member has not logged on in the past 8 years. It is not sure you will get an answer. Do not hold your breath.

#105914 - 10/08/12 03:32 PM MG [Re: KazJaps]
ChickenBittie Offline
New Egg

Registered: 10/08/12
Posts: 2
Loc: USA
Originally Posted By: KazJaps
I totally agree with Caveny in that the easiest way to proceed would be to destroy this flock & start again. But is the immediate destroying of positive flocks the only available option for disease management? Well of course, no! Is the eradication of positive flocks, in every situation, always the most practical & effective method of disease control? Once again no!

These are questions that immediately come to mind:
With the destroying of flocks:
1: Are you able to find clean replacement stock & of the genetic quality that you seek?
2: What is the probability of reinfection to a new flock?
And if you keep positive birds:
3: How prominent are Mycoplasmas in your area & where would YOU be spreading Mycoplasmas to, especially if many other small flocks are positive? Certainly not to others that practise biosecurity.
4: Is there a possibility of disease containment (ie quarantine)?
5: If there is little possibility of disease containment then what does this imply about the likelihood of reinfection of a clean flock?
6: Are there positive birds in the flock showing resistance to disease? These resistant birds are valuable in breeding programs. Part of the problem with eradication programs is that if All surviving birds are eradicated in a flock, genetic resistance is not allowed to develop in a population.

And this leads to the next question that keeps coming to mind. Why are some people once severely burned by diseases relying totally on other breeders to do all the hard work in establishing clean & resistant breeding stock? Why arenít they doing this themselves? Where are you going to get clean stock from if everyone keeps killing their flocks and passing the buck on to someone else? And will the few clean flocks available provide RESISTANT breeding stock or are all the tested resistant birds being killed in the process of positive flock eradication?

Unfortunately it WAS by culling that commercial flocks were cleared of this disease.
But you see, all commercial flocks are NOT clean of Mycoplasmas. The eradication programs worked well with commercial breeder flocks, but Mycoplasmas still occur in production birds (& Caveny mentioned previously it still occurs in breeding stock). Do all commercial operations immediately kill off production flocks when found positive to Mycoplasmas? No!!! If keeping flocks clean of Mycoplasmas is difficult for commercial operations, what are your chances of keeping your flocks clean? Now apply this to your own situation and take a realistic look at the likelihood of providing such strict biosecurity to your own flock. Remembering here, that you are literally putting all your eggs in one basket, relying totally on isolation as a defence mechanism. One slip up means destroying your flock & starting again.

Successful eradication of Mycoplasmas in breeding flocks was not achieved by the immediate killing of all breeding flocks found positive to MS & MG. Why would you do this when it is known that a high percentage of flocks are positive? You would be losing valuable breeding stock & eradicating a large percentage of the gene pool, including proven RESISTANT stock. Such eradication programs of well-established & wide spread diseases are not achieved overnight. It is my understanding that part of the eradication program entailed segregation (isolation) of breeding stock, treating breeder eggs, gradually eradicating infected parent stock & keeping the clean (isolated) offspring for the next breeding generation.

I do not see where the eradication of all small flocks found positive to Mycoplasmas will achieve anything productive, in situations where it is known the likelihood of reinfection is very high & when such a high percentage of the population is positive. Be realistic here. What are you achieving? Yes, if you know you have a high probability of successfully isolating your stock from Mycoplasmas, by all means, buy TESTED CLEAN stock & keep in strict quarantine. But if you are contemplating exhibiting any stock, well forget about relying on biosecurity alone, unless it is a one-way trip to the show, and forget about free ranging if there is the slightest possibility of contact with wild animals. The risks are just too high. There are no commercial flocks in Australia positive to virulent Newcastle Disease. So why has the government decision been made for the compulsory vaccination of all commercial flocks? What, isnít the quarantine practises enough?

Take this into consideration. The majority of small flocks are positive to Mycoplasmas. Are all of the birds in these flocks showing signs of disease? NO!!!! It is the misconception I keep reading that if an animal is positive to a pathogen or is positive to antigens, it must be diseased. WRONG!!! I canít remember now where I read this but I think it is that a large percentage of the human population carry the herpes virus responsible for the common cold sore. But it is only a minority of people that ever develop cold sores (disease). Now put this into a poultry perspective. Would you eradicate all individuals found positive to the virus or would you use the large percentage of individuals found resistant, in breeding programs? In a wild bird breeding program, would you prefer to have wild birds from the UK (found positive to antigens of the West Nile virus, therefore signs of resistance) or wild birds in the USA tested negative to West Nile virus antigens but found susceptible to the disease? The ideal would be breeding stock negative to pathogens & tested resistant to disease. But how many backyard breeders have the resources & money to do this sort of lab work?

In my situation, the reliance on biosecurity alone is such an unrealistic gamble on the health of my flock, that if I did this I would be totally irresponsible. It is much more sensible for me to prepare for the likelihood of exposure to common diseases in my area. I do this by selection/breeding of birds found to have resistance to low mortality diseases & vaccinating for the virulent diseases in my area. Here is a link to Brian Reederís website, where you can read of his endeavours to develop disease resistant lines (including Mycoplasmas):

If anyone wants to read up on genetic disease resistance ďPoultry Breeding & GeneticsĒ has a lot of information on the topic.

I do know someone personally who is in the process of eradicating Infectious Coryza from his breeding stock. He is achieving this by setting up a quarantine area for infected parent stock & artificially incubating eggs, rearing young stock in another quarantine area. He doesnít buy birds anymore, never exhibits birds & lives on large enough acreage for a quarantine system to be successful.

If my cat or dog became ill with a disease that would infect every other cat or dog they met then yes I would definately have them culled.I would expect everyone to do the same.
Why would you kill your cats, dogs over some disease that has such a low mortality rate? Why do you believe you would HAVE to kill your pet & why would you be letting a positive animal have contact with other animals? Ever thought of vaccines? Does your vet advocate killing all pets found positive to infectious diseases or advocate the vaccination of all animals? Wouldnít he/she be doing everything to save the life of an infectious animal?
Why arenít you upset that people DO NOT kill off all flocks found positive to Marekís Disease? Why arenít you upset that no one is doing anything about eradicating coccidia? Why people have been letting protozoa spread everywhere! I donít know, I hope Iím not the only one out there that doesnít immediately think about gathering a possie together & stringing someone elseís neck because OUR birds have contracted a disease. Unless someone has intentionally come in to my chook yard carrying an infectious disease with the sole intention of infecting my flock, the sole responsibility of my flockís health is ALL MINE!

So what would your recommendation be to eradicate some that show symptoms even though they have been treated with tylosin and tetracycline and take the rest that showed no symptoms and try to breed it out with the next gen. and would you vaccinate the next gen. against it to try to eradicate the virus that way.Small farms alot of times are caught in between the commercial end and the smallest dose vaccines are 1000 doses,there would almost certainly be away to breed it out for the simple reason is the recommended vacc. is @ 9wks its a live virus now I understand that it is a lower exposure non the less they have been exposed no antibiotics 5 days before or 3 wks after vaccine....Why? so they can build anti-bodies the strong live and the week dont..If the Poultry industry would help the small farm this would not be a problem eradication of entire flocks would be a great loss to the farmer financially and to the breed itself this is why we have birds on the Critical and Threatened List... would just like to here your take on it and anyone else that may have some small farm knowledge...because MG is everywhere!!!

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