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02-21-2015, 05:35 PM
I got my CAE/CL results back from WADDL today, and everyone's tests came back negative for everything (yay!) except Lilly's CL test. She came back with a positive result and a titer of 1:64. However, the note on the paper says,
"Titers of < 1:8 are considered negative. The predictive value of negative titers is enhanced if all herd mates also test negative. Titers between 1:8 and 1:256 are interpreted as evidence of infection, colostral immunity, or vaccination."
I'm quite sure Lilly has never been vaccinated for CL, and if she had then I imagine her past tests would have come back positive. I'm not sure about colostral immunity. She was dam-raised for the first couple weeks after she was born. But once again, her tests have come back negative the last two years. If Lilly had antibodies from her mother, is it possible they wouldn't show up in her blood until now?
If Lilly somehow got infected, is it possible for her to infect my other goats if she has no clinical signs at all? She's never had an abscess and has never had a cough. Is there any way results could have been skewed by factors other than CL? Should I get her tested again, perhaps by a different lab? Since she's technically still considered negative, is there any reason for me to be concerned at all?
I'd appreciate any thoughts or advice.
"Titers of < 1:8 are considered negative. The predictive value of negative titers is enhanced if all herd mates also test negative. Titers between 1:8 and 1:256 are interpreted as evidence of infection, colostral immunity, or vaccination."
I'm quite sure Lilly has never been vaccinated for CL, and if she had then I imagine her past tests would have come back positive. I'm not sure about colostral immunity. She was dam-raised for the first couple weeks after she was born. But once again, her tests have come back negative the last two years. If Lilly had antibodies from her mother, is it possible they wouldn't show up in her blood until now?
If Lilly somehow got infected, is it possible for her to infect my other goats if she has no clinical signs at all? She's never had an abscess and has never had a cough. Is there any way results could have been skewed by factors other than CL? Should I get her tested again, perhaps by a different lab? Since she's technically still considered negative, is there any reason for me to be concerned at all?
I'd appreciate any thoughts or advice.