Confirmamos la desparasitación antes de la esterilización.

Spanish often leaves out subject pronouns because the verb ending already shows who is doing the action.

Here, confirmamos tells you the subject is we. So:

• Confirmamos la desparasitación... = We confirm the deworming / parasite treatment...
• Nosotros confirmamos la desparasitación... is also possible, but it usually adds emphasis or contrast.

This is very normal in Spanish.

It can mean either one, because for -ar verbs, the nosotros form is the same in the present indicative and the preterite.

So confirmamos can be:

• we confirm
• we confirmed

You usually tell from context, time words, or the surrounding conversation.

For example:

• Hoy confirmamos la desparasitación = Today we confirm...
• Ayer confirmamos la desparasitación = Yesterday we confirmed...

Desparasitación is the noun meaning deworming or, more broadly, parasite treatment.

It comes from the verb desparasitar, which means to remove parasites from an animal.

In veterinary contexts, it can refer to treatment against:

• internal parasites, like worms
• external parasites, like fleas or ticks

So depending on the context, English might translate it as deworming, parasite treatment, or anti-parasite treatment.

Spanish often uses the definite article the more than English does, especially with procedures, processes, and abstract nouns.

So:

• la desparasitación
• la esterilización

sounds natural in Spanish, even if English might sometimes say:

• before sterilization
• before the sterilization
• before spaying/neutering

depending on context.

In this sentence, la makes both procedures sound like specific or understood processes.

Because antes needs de when it is followed by a noun or an infinitive.

So the pattern is:

• antes de + noun
• antes de + infinitive

Examples:

• antes de la esterilización
• antes del examen
• antes de salir

You can use antes by itself only when nothing follows it, or when the rest is already understood:

• Lo hicimos antes. = We did it earlier / before.

Often, yes, in a veterinary context.

Esterilización literally means sterilization, but when talking about animals, it often refers to the procedure that makes them unable to reproduce. In English, that is often expressed as:

• spaying for females
• neutering for males
• sometimes just sterilization as a general term

So the exact English choice depends on whether the animal’s sex is known and on how specific the translation wants to be.

Because del is only used when de + el come together.

Here the noun is la esterilización, which is feminine, so:

• de + la = de la
• de + el = del

Examples:

• antes de la esterilización
• antes del tratamiento

So there is no contraction with la.

Yes. Spanish word order is flexible, although the original sentence is very natural.

You could also say:

• Antes de la esterilización, confirmamos la desparasitación.

This puts more focus on the time sequence: before the sterilization.

The original version sounds straightforward and neutral: Confirmamos la desparasitación antes de la esterilización.

Because it is the thing being confirmed.

In the sentence:

• Confirmamos = the action
• la desparasitación = what is confirmed

So la desparasitación is the direct object of confirmamos.

That is also why there is no personal a here. The personal a is mainly used with specific people, and sometimes animals treated as individual beings, but not with a procedure or treatment like desparasitación.

The written accent in desparasitación shows where the stress goes: the final syllable -ción is stressed.

So it is pronounced roughly like:

dehs-pah-rah-see-ah-THYON in Peninsular Spanish
or
dehs-pah-rah-see-ah-SYON in many Latin American varieties

In Spain, ci is often pronounced with a th sound, which is why learners of Spanish from Spain may hear -thión.

The accent mark is important because it tells you the stress falls where it otherwise would not.

Yes, depending on the nuance.

For example:

• comprobamos = we check / verify
• verificamos = we verify
• confirmamos = we confirm

The difference is subtle:

• comprobar suggests checking whether something is true or done
• verificar sounds a bit more formal or technical
• confirmar suggests making sure or officially confirming it

In a clinic or veterinary setting, confirmamos sounds natural if the idea is that the parasite treatment is confirmed before the sterilization procedure.