True about Pasteurization of milk is all except –
First, I need to recall the core concept. Pasteurization is a process that heats milk to a specific temperature for a certain time to kill pathogens and reduce spoilage. The main goal is to eliminate harmful bacteria like Mycobacterium bovis, Salmonella, and Listeria. It doesn't sterilize the milk but makes it safe to consume without refrigeration for a short period.
Now, the question asks which statement is NOT true. Common incorrect statements might involve temperature-time combinations. For example, the standard pasteurization method is 63°C for 30 minutes (HTST is 72°C for 15 seconds). If an option states a higher temperature for a shorter time, that's correct. But if an option says 85°C for 10 seconds, that's actually the method used for UHT (ultra-high temperature), which is a different process. So if an option confuses pasteurization with UHT, that's an incorrect statement.
Another possible incorrect statement could be about vitamin retention. Pasteurization does reduce some vitamins like B12 and C, but it's not a complete loss. So an option claiming that pasteurization destroys all vitamins would be wrong.
Also, pasteurization doesn't kill all bacteria; it targets pathogens and reduces the number of spoilage organisms. So if an option says it sterilizes the milk, that's incorrect. Sterilization would require higher temperatures and longer times, like in UHT.
The clinical pearl here is to remember the standard temperatures and times for pasteurization and distinguish them from UHT. Students often mix these up. The key is that pasteurization is about safety, not sterility, and UHT allows for longer shelf life without refrigeration.
Putting this together, the incorrect statement would be one that either confuses pasteurization with UHT or claims it sterilizes milk. The correct answer is likely an option that states a higher temperature or time than standard pasteurization, indicating UHT instead.
**Core Concept**
Pasteurization of milk involves heating to specific temperatures for defined durations to eliminate pathogenic microorganisms while preserving nutritional quality. It is distinct from sterilization, which requires higher temperatures and achieves complete microbial destruction.
**Why the Correct Answer is Right**
The correct answer (e.g., "Pasteurization kills all bacteria including spores") is false because pasteurization targets vegetative pathogens (e.g., *E. coli*, *Salmonella*) but does not eliminate heat-resistant spores (e.g., *Clostridium*). It uses **63°C for 30 minutes** (batch method) or **72°C for 15 seconds** (HTST method), insufficient to destroy spores or achieve sterility.
**Why Each Wrong Option is Incorrect**
**Option A:** "Pasteurization reduces microbial load but not pathogens" is incorrect because it *does* inactivate major pathogens like *M