| Chronic infection with S. stercoralis is often inapparent, but it can cause gastrointestinal, cutaneous, or pulmonary symptoms. |
| It has been estimated that 30 to 50 percent of the world's human population has been infected with Toxoplasma and harbors the clinically inapparent cyst form. |
| In animals, RVF may be inapparent in non-pregnant adults, but outbreaks are characterised by the onset of abortions and high neonatal mortality. |
| Infection with EIA tends to become inapparent if death does not result from one of the acute clinical attacks. |
| Reactivation occasionally progresses clinically inapparent or with low pathology in immune competent persons whereas severe clinical complications occur in immunocompromized patients. |
| In two of these establishments, there was an inapparent infection in indigenous cattle, while in the third establishment clinical signs were observed in five animals. |
