Plate and slant swabbing

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Deo Vindice.
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Is it routine for private practice ophthalmologists to swab their own plates for culture? It seems like redundant lab tech work. One doc in town even swabs slants but that’s a 90s thing. Molecular has supplanted all that.

Any opinions? Thanks.
 
Micro slants? Still in use?

From the path forum. FYI.
 
I thought it was standard for us to swab and plate ourselves, given the nature of the site and the small inoculant volume.

I did this throughout residency and fellowship and still do this in private practice, and I've never once had the path lab push back at me - they have all been accustomed to ophthalmologists plating their bacterial cultures themselves. (Acanthamoeba is a different story.)

I could be misunderstanding what part of the process they're referring to over on the path forum.

I may also be especially finicky because of the number of specimens the micro labs have messed up or unilaterally changed without notifying me, despite my doing everything humanly possible to notify them of what I needed from the specimen.
 
In my residency we routinely perform our own cultures and plating ourselves. I thought this was standard in every residency program. This website taught me a lot. Cornea Culture

Curious what other programs do.
 
I think one problem is that anyone can swab technically, but how do you have a sterile loop etc., prevent contamination etc. in a clinic? How are you storing your agar plates in clinic (temp / humidity records daily? Logistics of shipping, labeling etc? I would presume the clinic would have to have a solid policy. For an ophthalmologist to swab is like having the surgeon mop the floor of the OR between cases, there is a much better use of your time honestly (my 0.02)

What are you doing about fastidious organisms? What if it is viral? Do you do viral culture? Foreskins still (a prod at slants still in use)?

Again, what about slants? I'm shocked in the age of molecular diagnostics ophthalmologists are still using slants. I don't even know if many buy slants commercially, I marvel if the big box labs send them prepackaged (do they?).

In the hospital lab, we are accustomed to small samples (imagine the cores and aspirates we get from IR etc). I think it is a moot point from earlier in the history of medicine that microbiology techs (many with master degrees in the subject) can't swab plates with very small samples. Literally they do it hundreds of times a day. At the very least big labs are accredited and reviewed, not so much with random clinics and practices.

I do recognize the labs can screw it up, but this is what they DO in microbiology labs, I would have to suggest the number of screw ups is very tiny or the whole medical staff would revolt. Given that I'm OCD and still probably do things I should let others do myself in the lab.

Just a fascinating topic I encountered on a weekend. Thank you very much for the input.
 
I legit never would have expected even the faintest hint of beef between us and the microbio lab, so let's make sure we're actually understanding each other.

Let me paint a picture of what us taking cultures actually looks like. We get a patient in the office or ER, they have a bad corneal ulcer. Or they have endophthalmitis. This is potentially an emergent situation. We need to culture this first before starting topical antimicrobials. We go to the lab, get a series of plates, swab the lesion (or perform a tap), and immediately plate it directly onto the plates. I'm not sure how else it can be done. Unless you mean putting the specimen in a generic bacterial culture tube and/or viral transport media and letting the lab techs plate that out?

When you say slants, do you mean actual slants, like L-J or Middlebrook? Or is "slants" a lab shorthand for any type of plating?

Again, I'm not sure we're understanding each other. Exactly what part of this process do you take issue with, and what would you like to see changed?

Our textbooks universally recommend this practice. We ALL have been taught to do it this way in residency. Our specimens are extraordinarily precious - we cannot easily obtain the specimen again, and we are only able to obtain a tiny amount of specimen. We are the only ones who can swab - our techs absolutely cannot do it for us. And we need to swab right when we see the patient, because the the serious nature of their conditions usually means they need antibiotics for these conditions, like, yesterday.

To answer your other questions:
- Fastidious organisms - not often what we're looking for, but if I'm suspecting one, I communicate with the lab ahead of time about these about how they want me to do the culture
- Viral culture - for us, most commonly it's going to be HSV or VZV; sometimes CMV. It'll be either a swab or an aspirate obtained by needle aspirate from the eyeball, and it goes into viral transport medium for PCR
- Plate storage - all clinics have protocols for this. Fridge temps have external thermometers that are monitored. Often we're storing other critical temp-sensitive meds in there, so it has to be finely regulated
- Foreskins - if I'm understanding you correctly, this is where you actually break the surface of the medium when you plate? If so - even though this is the classic teaching, only one out of the dozens of hospitals I've worked at over the years actually wanted this. I typically streak

This is absolutely NOT the equivalent of the surgeon doing non-surgical tasks. This is ophthalmologists recognizing that the samples we get cannot be re-obtained and that we need to make sure the cultures are getting done how we need them to be done. It is absolutely a good use of our time - a LOT rides on the results of those cultures. Making sure our treatments are targeting the correct organism can mean the difference between permanent blindness and sight.

Again, I'm curious about exactly what part of this process you disagree with and exactly how you'd like to see it done differently. I'm open to recommendations on how we can improve our process, but I'm not interested in a flame war with the lab.. that would just be really weird. The hospital has enough of these useless "we know how to do this better, what is this service even thinking, these guys are so stupid" flexes, and I do not care for them one bit.
 
Well written and informative Incresence, I appreciate the time in this interesting matter. I tired to respond is a sensible fashion.

The doc in question calls me on Saturday afternoon and demands my hospital lab (I'm the medical director) supply plates and slants so they can do an outpatient culture. I am cautious because this was out of the ordinary, from what you say many clinics keep and monitor their own plates. Slants are a thing of the past, I can't imagine big box labs providing these, but who knows. The rare times our hospital based lab has supplied plates to ophthalmologists they are sent to a separate commercial lab. In this case there was not an option of the lab being involved intimately as you mention is common above.

I completely recognize the need for swift culture in these cases, but cannot a swab in culture media for transport not be good enough (seems good enough for viral media)? I chortle when I have an ophthalmologist telling me they streak better than my micro techs who literally probably do 300 plate streaks a day (I would argue that it is an art - plate streaking). It sounds like in your case at your institution, you work closely with the microlab and that is understandable. From my perspective, I would not want my lab accepting random plates from a clinic that says they streaked them and we are responsible for them (my techs are trained and paid for that), it sort of loosens us from the control of analytic errors which streaking falls into and laboratorian responsibility (i.e. Pre-analytic / analytic / post analytic categories of errors).

In this case, the saturday streak job, I don't see how a clinic is going to perform such tasks adequately or effectively. When they started mentioning they need slants, I don't know who their main supplier of such things are, but it wasn't anyone from this decade, that's why I really bored down on them (they still wouldn't tell me what lab was providing slants). I would argue that slants are redundant and would be impressed if anyone is using them in the age of Microscan analyzers etc.

So, in essence, the process I had offense to, was basically being told to fork over the plates and informed that a MD was better than my microtechs who have degrees and decades of experience in this stuff and get in a huff when outdated procedures are demanded (slants....comical). In the end, the ophthalmologist said the patient was a child of a physician and that physician would supply the plates for culture (I stopped asking questions because it sounds like a bad ending). Who knows. Even if cultured for commercial lab, it would sit around on a FedEx plane somewhere until Monday, which is why I guess we were called versus big box lab.

From a legal perspective (since I'm on the look out) would most ophthalmologists have a log of how many cultures you swab yourself a year? Plantiff pathologists would highlight this and compare it to the tens of thousands a general microbiology lab tech does a year. If you see where I am going with this and why my radar popped up. Pathology litigation and defense is unfortunately, my hobby.

Foreskin statement was a joke, that is rarely used for viral culture in modern labs, just a historical throwback when there was a jar sitting around in the mircolab with foreskins.
 
If we could punt this task to pathology we definitely would, especially on a Saturday. Most swabs I've seen are way bigger than the corneal lesion we're swabbing, and so sometimes we're using the edge of a scalpel to obtain specimen from the cornea. There's often no swab being used at all..

I am a little surprised this private practice doc didn't punt the case to the nearest academic center though.
 
I fail to see why one can't swab the lesion and stick it in transport media? It just seems by streaking plates the physician is doing redundant laboratorian work.
 
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