Salah was forced to miss Egypt's 2021 Africa Cup of Nations qualifiers this month after testing positive for COVID-19, just days after he had been seen failing to apply social distancing at his brother's wedding.
Mido, who scored 14 goals in 45 appearances for the Pharaohs, has now slammed his countryman and accused him of gross negligence by taking part in the wedding celebrations.
"He showed great negligence with the steps taken to prevent coronavirus, and the result was that he was infected.
"The neglect of Mohamed Salah caused the Egyptian team to lose an important player in a very important match and time, and he also risked the health of his teammates. He should not have been present at his brother's wedding, especially at that time.
The former Ajax Amsterdam, Tottenham Hotspur and AS Roma star also took aim at the Egyptian Football Association, accusing of being hypocrites and showing a lack of leadership in the aftermath of Salah's results being released.
"The other point here is the silence of all those responsible for the player's negligence, which confirms the fact that the player is still bigger than the national team and this will lead to a great failure," Mido added.
"When I missed the 2006 Africa Cup of Nations, I was punished by missing the final and being excluded from the national team for six months, even if I played [at club level].
"The final we lost, I was young and I thought I was bigger than the team, but I confirm now that no one is bigger than the team, and if someone thinks this, this will be a great failure.
"Officials in Egypt did not direct any word of blame or reproach to Mohamed Salah and the harm caused by his negligence to the Egyptian team.
"And I name each of them: the Minister of Sports Ashraf Sobhi, chairman of the EFA Amr Al-Ganayni, the coach of the national team Hossam Al-Badri, and the national team director Mohamed Barakat, all are cowards and fear Mohamed Salah fans who love the Liverpool star.
"But here I am speaking without calculations or fear of anyone. No one can say that Salah did not make a mistake by going to his brother's wedding at that difficult time and in light of the coronavirus crisis.
"All the English newspapers speak against us negatively, Salah should have been blamed for what he did, but everyone feels fear."