Molly strange after giving birth

We can only give our best guess on what the situation could be, it very well may be something else. However, with the pictures and symptoms you gave it very much resembles TB. Parasites of some type would be my second guess. If you are loosing fish still, you may want to pick-up a parasitic medication and try treating the tank for a week to see if it helps, it certainly couldn't hurt at this point. I think ultimately the decision to do anything is yours, but I would suggest caution in handling anything associated with that tank, use gloves if necessary, until you can be sure one way or another. As you know, TB can be a very serious thing, so when in doubt assume the worst but hope for the best. And certainly get more than just my opinion before scrapping your tank.

Just keep in mind that this disease can be a slow progression, which means while some fish may appear healthy, they are in fact not. Here is another interesting mention;
Because of the slow progression of the disease, younger fish infected with mycobacteriosis show no external signs. As fish age or are stressed, the infection becomes more serious.
I certainly don’t want everyone to go home and think they may have TB in their tank. While it is a serious issue, it is not as common as one might think and that chance of getting it yourself is also uncommon;
Mycobacteriosis in fish is a disease caused by certain bacterial species within the genus Mycobacterium. There are many different species of Mycobacterium that cause diseases in animals. Some of these cause important diseases in humans. However, those species that cause Mycobacteriosis in fish are referred to as non-tuberculous mycobacteria and do not cause major disease in normal, healthy people.
These quotes can be found at http://edis.ifas.ufl.edu/VM055
 
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